HHH-17506 Support ON CONFLICT clause for HQL/Criteria inserts

databases/hana/resources/hibernate.properties

@@ -5,7 +5,7 @@
 # See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 #
 
-hibernate.dialect org.hibernate.dialect.HANAColumnStoreDialect
+hibernate.dialect org.hibernate.dialect.HANADialect
 hibernate.connection.driver_class com.sap.db.jdbc.Driver
 hibernate.connection.url jdbc:sap://localhost:39015/
 hibernate.connection.username HIBERNATE_TEST

etc/hibernate.properties.template

@@ -161,7 +161,7 @@ hibernate.connection.url @DB_URL@
 
 ## HANA
 
-#hibernate.dialect org.hibernate.dialect.HANAColumnStoreDialect
+#hibernate.dialect org.hibernate.dialect.HANADialect
 #hibernate.connection.driver_class com.sap.db.jdbc.Driver
 #hibernate.connection.url jdbc:sap://localhost:30015
 #hibernate.connection.username HIBERNATE_TEST

gradle/databases.gradle

@@ -254,7 +254,7 @@ ext {
                         'connection.init_sql' : ''
                 ],
                 hana_cloud : [
-                        'db.dialect' : 'org.hibernate.dialect.HANAColumnStoreDialect',
+                        'db.dialect' : 'org.hibernate.dialect.HANADialect',
                         'jdbc.driver': 'com.sap.db.jdbc.Driver',
                         'jdbc.user'  : 'HIBERNATE_TEST',
                         'jdbc.pass'  : 'H1bernate_test',
@@ -263,7 +263,7 @@ ext {
                         'connection.init_sql' : ''
                 ],
                 hana_ci : [
-                        'db.dialect' : 'org.hibernate.dialect.HANAColumnStoreDialect',
+                        'db.dialect' : 'org.hibernate.dialect.HANADialect',
                         'jdbc.driver': 'com.sap.db.jdbc.Driver',
                         'jdbc.user'  : 'SYSTEM',
                         'jdbc.pass'  : 'H1bernate_test',

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/AltibaseSqlAstTranslator.java

@@ -146,13 +146,14 @@ public class AltibaseSqlAstTranslator<T extends JdbcOperation> extends AbstractS
 		emulateQueryPartTableReferenceColumnAliasing( tableReference );
 	}
 
-	protected String getFromDual() {
-		return " from dual";
+	@Override
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/CUBRIDSqlAstTranslator.java

@@ -82,14 +82,14 @@ public class CUBRIDSqlAstTranslator<T extends JdbcOperation> extends AbstractSql
 	}
 
 	@Override
-	protected String getFromDual() {
+	protected String getDual() {
 		//TODO: is this really needed?
 		//TODO: would "from table({0})" be better?
-		return " from db_root";
+		return "db_root";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/CockroachLegacyDialect.java

@@ -570,6 +570,10 @@ public class CockroachLegacyDialect extends Dialect {
 	public boolean supportsRecursiveCTE() {
 		return getVersion().isSameOrAfter( 20, 1 );
 	}
+	@Override
+	public boolean supportsConflictClauseForInsertCTE() {
+		return true;
+	}
 
 	@Override
 	public String getNoColumnsInsertString() {
@@ -1165,4 +1169,14 @@ public class CockroachLegacyDialect extends Dialect {
 //			RuntimeModelCreationContext runtimeModelCreationContext) {
 //		return new CteInsertStrategy( rootEntityDescriptor, runtimeModelCreationContext );
 //	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/CockroachLegacySqlAstTranslator.java

@@ -7,20 +7,27 @@
 package org.hibernate.community.dialect;
 
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteMaterialization;
-import org.hibernate.sql.ast.tree.cte.CteStatement;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.InArrayPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for Cockroach.
@@ -33,6 +40,56 @@ public class CockroachLegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void renderTableReferenceIdentificationVariable(TableReference tableReference) {
+		final String identificationVariable = tableReference.getIdentificationVariable();
+		if ( identificationVariable != null ) {
+			final Clause currentClause = getClauseStack().getCurrent();
+			if ( currentClause == Clause.INSERT ) {
+				// PostgreSQL requires the "as" keyword for inserts
+				appendSql( " as " );
+			}
+			else {
+				append( WHITESPACE );
+			}
+			append( tableReference.getIdentificationVariable() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		final Statement currentStatement = getStatementStack().getCurrent();
+		if ( !( currentStatement instanceof UpdateStatement )
+				|| !hasNonTrivialFromClause( ( (UpdateStatement) currentStatement ).getFromClause() ) ) {
+			// For UPDATE statements we render a full FROM clause and a join condition to match target table rows,
+			// but for that to work, we have to omit the alias for the target table reference here
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseJoiningDmlTargetReference( statement );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitStandardConflictClause( conflictClause );
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DB2LegacyDialect.java

@@ -24,6 +24,7 @@ import org.hibernate.dialect.DB2Dialect;
 import org.hibernate.dialect.DB2StructJdbcType;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.OracleDialect;
 import org.hibernate.dialect.aggregate.AggregateSupport;
 import org.hibernate.dialect.aggregate.DB2AggregateSupport;
@@ -49,8 +50,11 @@ import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.mapping.Column;
 import org.hibernate.metamodel.mapping.EntityMappingType;
@@ -94,6 +98,7 @@ import org.hibernate.type.spi.TypeConfiguration;
 
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
 import static org.hibernate.type.SqlTypes.BINARY;
 import static org.hibernate.type.SqlTypes.BLOB;
 import static org.hibernate.type.SqlTypes.BOOLEAN;
@@ -889,6 +894,20 @@ public class DB2LegacyDialect extends Dialect {
 		appender.appendSql( '\'' );
 	}
 
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor(
+				sqle -> {
+					switch ( JdbcExceptionHelper.extractErrorCode( sqle ) ) {
+						case -803:
+							return extractUsingTemplate( "SQLERRMC=1;", ",", sqle.getMessage() );
+						default:
+							return null;
+					}
+				}
+		);
+	}
+
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
@@ -896,6 +915,14 @@ public class DB2LegacyDialect extends Dialect {
 			switch ( errorCode ) {
 				case -952:
 					return new LockTimeoutException( message, sqlException, sql );
+				case -803:
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+					);
 			}
 			return null;
 		};
@@ -1079,4 +1106,14 @@ public class DB2LegacyDialect extends Dialect {
 	public int rowIdSqlType() {
 		return VARBINARY;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return getDB2Version().isSameOrAfter( 11 );
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DB2LegacySqlAstTranslator.java

@@ -13,8 +13,10 @@ import org.hibernate.LockMode;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
@@ -28,10 +30,12 @@ import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.TableReferenceJoin;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
@@ -344,12 +348,40 @@ public class DB2LegacySqlAstTranslator<T extends JdbcOperation> extends Abstract
 	@Override
 	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
 		final boolean closeWrapper = renderReturningClause( statement );
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
 			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
 		if ( closeWrapper ) {
 			appendSql( ')' );
 		}
 	}
 
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseExcludingDmlTargetReference( statement );
+	}
+
 	protected boolean renderReturningClause(MutationStatement statement) {
 		final List<ColumnReference> returningColumns = statement.getReturningColumns();
 		final int size = returningColumns.size();
@@ -497,13 +529,13 @@ public class DB2LegacySqlAstTranslator<T extends JdbcOperation> extends Abstract
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from sysibm.dual";
+	protected String getDual() {
+		return "sysibm.dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacyDialect.java

@@ -39,8 +39,11 @@ import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.metamodel.mapping.EntityMappingType;
 import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
@@ -706,14 +709,42 @@ public class DerbyLegacyDialect extends Dialect {
 		return false;
 	}
 
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor( sqle -> {
+			final String sqlState = JdbcExceptionHelper.extractSqlState( sqle );
+			if ( sqlState != null ) {
+				switch ( sqlState ) {
+					case "23505":
+						return TemplatedViolatedConstraintNameExtractor.extractUsingTemplate(
+								"'", "'",
+								sqle.getMessage()
+						);
+				}
+			}
+			return null;
+		} );
+	}
+
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
 			final String sqlState = JdbcExceptionHelper.extractSqlState( sqlException );
 //				final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
 
 			if ( sqlState != null ) {
 				switch ( sqlState ) {
+					case "23505":
+						// Unique constraint violation
+						constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+						return new ConstraintViolationException(
+								message,
+								sqlException,
+								sql,
+								ConstraintViolationException.ConstraintKind.UNIQUE,
+								constraintName
+						);
 					case "40XL1":
 					case "40XL2":
 						return new LockTimeoutException( message, sqlException, sql );

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/DerbyLegacySqlAstTranslator.java

@@ -235,13 +235,13 @@ public class DerbyLegacySqlAstTranslator<T extends JdbcOperation> extends Abstra
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from (values 0) dual";
+	protected String getDual() {
+		return "(values 0)";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual() + " dual";
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/FirebirdSqlAstTranslator.java

@@ -263,13 +263,13 @@ public class FirebirdSqlAstTranslator<T extends JdbcOperation> extends AbstractS
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from rdb$database";
+	protected String getDual() {
+		return "rdb$database";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/H2LegacyDialect.java

@@ -776,8 +776,19 @@ public class H2LegacyDialect extends Dialect {
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
 			final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
 
 			switch (errorCode) {
+				case 23505:
+					// Unique constraint violation
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
 				case 40001:
 					// DEADLOCK DETECTED
 					return new LockAcquisitionException(message, sqlException, sql);
@@ -786,7 +797,7 @@ public class H2LegacyDialect extends Dialect {
 					return new PessimisticLockException(message, sqlException, sql);
 				case 90006:
 					// NULL not allowed for column [90006-145]
-					final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
 					return new ConstraintViolationException(message, sqlException, sql, constraintName);
 				case 57014:
 					return new QueryTimeoutException( message, sqlException, sql );
@@ -940,4 +951,9 @@ public class H2LegacyDialect extends Dialect {
 	public int rowIdSqlType() {
 		return BIGINT;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/H2LegacySqlAstTranslator.java

@@ -12,6 +12,7 @@ import org.hibernate.LockMode;
 import org.hibernate.dialect.identity.H2IdentityColumnSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.internal.util.collections.CollectionHelper;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
@@ -27,14 +28,18 @@ import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.SqlTupleContainer;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.InSubQueryPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.SelectClause;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.model.internal.TableInsertStandard;
 
@@ -79,6 +84,44 @@ public class H2LegacySqlAstTranslator<T extends JdbcOperation> extends AbstractS
 		);
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateMerge( statement );
+		}
+		else {
+			super.visitUpdateStatementOnly( statement );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected void visitReturningColumns(List<ColumnReference> returningColumns) {
 		// do nothing - this is handled via `#visitReturningInsertStatement`
@@ -289,8 +332,8 @@ public class H2LegacySqlAstTranslator<T extends JdbcOperation> extends AbstractS
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/HSQLLegacyDialect.java

@@ -41,6 +41,8 @@ import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.jdbc.env.spi.NameQualifierSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.event.spi.EventSource;
+import org.hibernate.exception.ConstraintViolationException;
+import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
 import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
 import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.CoreMessageLogger;
@@ -497,6 +499,29 @@ public class HSQLLegacyDialect extends Dialect {
 				return null;
 			} );
 
+	@Override
+	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
+		return (sqlException, message, sql) -> {
+			final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
+
+			switch ( errorCode ) {
+				case -104:
+					// Unique constraint violation
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
+			}
+
+			return null;
+		};
+	}
+
 	/**
 	 * HSQLDB 2.0 messages have changed
 	 * messages may be localized - therefore use the common, non-locale element " table: "
@@ -856,4 +881,9 @@ public class HSQLLegacyDialect extends Dialect {
 	public UniqueDelegate getUniqueDelegate() {
 		return uniqueDelegate;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/HSQLLegacySqlAstTranslator.java

@@ -11,23 +11,32 @@ import java.util.function.Consumer;
 
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.BinaryArithmeticOperator;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteStatement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.type.descriptor.jdbc.ArrayJdbcType;
 
@@ -42,6 +51,44 @@ public class HSQLLegacySqlAstTranslator<T extends JdbcOperation> extends Abstrac
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateMerge( statement );
+		}
+		else {
+			super.visitUpdateStatementOnly( statement );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -295,14 +342,9 @@ public class HSQLLegacySqlAstTranslator<T extends JdbcOperation> extends Abstrac
 		return false;
 	}
 
-	@Override
-	protected String getFromDual() {
-		return " from (values(0))";
-	}
-
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/InformixSqlAstTranslator.java

@@ -134,13 +134,13 @@ public class InformixSqlAstTranslator<T extends JdbcOperation> extends AbstractS
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from (select 0 from systables where tabid=1) dual";
+	protected String getDual() {
+		return "(select 0 from systables where tabid=1)";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual() + " dual";
 	}
 
 	private boolean supportsParameterOffsetFetchExpression() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/IngresSqlAstTranslator.java

@@ -139,14 +139,14 @@ public class IngresSqlAstTranslator<T extends JdbcOperation> extends AbstractSql
 	}
 
 	@Override
-	protected String getFromDual() {
-		//this is only necessary if the query has a where clause
-		return " from (select 0) dual";
+	protected String getDual() {
+		return "(select 0)";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		//this is only necessary if the query has a where clause
+		return " from " + getDual() + " dual";
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/MariaDBLegacySqlAstTranslator.java

@@ -6,22 +6,38 @@
  */
 package org.hibernate.community.dialect;
 
+import java.util.ArrayList;
+import java.util.List;
+
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.MySQLSqlAstTranslator;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.CastTarget;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.select.SelectStatement;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for MariaDB.
@@ -37,6 +53,135 @@ public class MariaDBLegacySqlAstTranslator<T extends JdbcOperation> extends Abst
 		this.dialect = (MariaDBLegacyDialect)super.getDialect();
 	}
 
+	@Override
+	protected void visitInsertSource(InsertSelectStatement statement) {
+		if ( statement.getSourceSelectStatement() != null ) {
+			if ( statement.getConflictClause() != null ) {
+				final List<ColumnReference> targetColumnReferences = statement.getTargetColumns();
+				final List<String> columnNames = new ArrayList<>( targetColumnReferences.size() );
+				for ( ColumnReference targetColumnReference : targetColumnReferences ) {
+					columnNames.add( targetColumnReference.getColumnExpression() );
+				}
+				appendSql( "select * from " );
+				emulateQueryPartTableReferenceColumnAliasing(
+						new QueryPartTableReference(
+								new SelectStatement( statement.getSourceSelectStatement() ),
+								"excluded",
+								columnNames,
+								false,
+								getSessionFactory()
+						)
+				);
+			}
+			else {
+				statement.getSourceSelectStatement().accept( this );
+			}
+		}
+		else {
+			visitValuesList( statement.getValuesList() );
+		}
+	}
+
+	@Override
+	public void visitColumnReference(ColumnReference columnReference) {
+		final Statement currentStatement;
+		if ( "excluded".equals( columnReference.getQualifier() )
+				&& ( currentStatement = getStatementStack().getCurrent() ) instanceof InsertSelectStatement
+				&& ( (InsertSelectStatement) currentStatement ).getSourceSelectStatement() == null ) {
+			// Accessing the excluded row for an insert-values statement in the conflict clause requires the values qualifier
+			appendSql( "values(" );
+			columnReference.appendReadExpression( this, null );
+			append( ')' );
+		}
+		else {
+			super.visitColumnReference( columnReference );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		if ( updateStatement.getFromClause().getRoots().isEmpty() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update " );
+			renderFromClauseSpaces( updateStatement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitOnDuplicateKeyConflictClause( conflictClause );
+	}
+
+	@Override
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		// Since MariaDB does not support aliasing the insert target table,
+		// we must detect column reference that are used in the conflict clause
+		// and use the table expression as qualifier instead
+		if ( getClauseStack().getCurrent() != Clause.SET
+				|| !( ( currentDmlStatement = getCurrentDmlStatement() ) instanceof InsertSelectStatement )
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
+		// Qualify the column reference with the table expression also when in subqueries
+		else if ( qualifierSupport != DmlTargetColumnQualifierSupport.NONE || !getQueryPartStack().isEmpty() ) {
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
+		}
+		else {
+			return null;
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClause() {
 		return dialect.getVersion().isSameOrAfter( 10, 2 );
@@ -222,13 +367,13 @@ public class MariaDBLegacySqlAstTranslator<T extends JdbcOperation> extends Abst
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getDialect().getVersion().isBefore( 10, 4 ) ? getFromDual() : "";
+		return getDialect().getVersion().isBefore( 10, 4 ) ? ( " from " + getDual() ) : "";
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/MaxDBSqlAstTranslator.java

@@ -94,12 +94,12 @@ public class MaxDBSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlA
 	}
 
 	@Override
-	public String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/MimerSQLSqlAstTranslator.java

@@ -82,13 +82,8 @@ public class MimerSQLSqlAstTranslator<T extends JdbcOperation> extends AbstractS
 		return false;
 	}
 
-	@Override
-	protected String getFromDual() {
-		return " from (values(0))";
-	}
-
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/MySQLLegacyDialect.java

@@ -1395,4 +1395,14 @@ public class MySQLLegacyDialect extends Dialect {
 		return "set foreign_key_checks = 1";
 	}
 
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
+
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/MySQLLegacySqlAstTranslator.java

@@ -6,24 +6,40 @@
  */
 package org.hibernate.community.dialect;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.hibernate.dialect.DialectDelegateWrapper;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.MySQLSqlAstTranslator;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.CastTarget;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.select.SelectStatement;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for MySQL.
@@ -36,6 +52,146 @@ public class MySQLLegacySqlAstTranslator<T extends JdbcOperation> extends Abstra
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertSource(InsertSelectStatement statement) {
+		if ( statement.getSourceSelectStatement() != null ) {
+			if ( statement.getConflictClause() != null ) {
+				final List<ColumnReference> targetColumnReferences = statement.getTargetColumns();
+				final List<String> columnNames = new ArrayList<>( targetColumnReferences.size() );
+				for ( ColumnReference targetColumnReference : targetColumnReferences ) {
+					columnNames.add( targetColumnReference.getColumnExpression() );
+				}
+				appendSql( "select * from " );
+				emulateQueryPartTableReferenceColumnAliasing(
+						new QueryPartTableReference(
+								new SelectStatement( statement.getSourceSelectStatement() ),
+								"excluded",
+								columnNames,
+								false,
+								getSessionFactory()
+						)
+				);
+			}
+			else {
+				statement.getSourceSelectStatement().accept( this );
+			}
+		}
+		else {
+			visitValuesList( statement.getValuesList() );
+			if ( statement.getConflictClause() != null && getDialect().getMySQLVersion().isSameOrAfter( 8, 0, 19 ) ) {
+				appendSql( " as excluded" );
+				char separator = '(';
+				for ( ColumnReference targetColumn : statement.getTargetColumns() ) {
+					appendSql( separator );
+					appendSql( targetColumn.getColumnExpression() );
+					separator = ',';
+				}
+				appendSql( ')' );
+			}
+		}
+	}
+
+	@Override
+	public void visitColumnReference(ColumnReference columnReference) {
+		final Statement currentStatement;
+		if ( getDialect().getMySQLVersion().isBefore( 8, 0, 19 )
+				&& "excluded".equals( columnReference.getQualifier() )
+				&& ( currentStatement = getStatementStack().getCurrent() ) instanceof InsertSelectStatement
+				&& ( (InsertSelectStatement) currentStatement ).getSourceSelectStatement() == null ) {
+			// Accessing the excluded row for an insert-values statement in the conflict clause requires the values qualifier
+			appendSql( "values(" );
+			columnReference.appendReadExpression( this, null );
+			append( ')' );
+		}
+		else {
+			super.visitColumnReference( columnReference );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		if ( updateStatement.getFromClause().getRoots().isEmpty() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update " );
+			renderFromClauseSpaces( updateStatement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitOnDuplicateKeyConflictClause( conflictClause );
+	}
+
+	@Override
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		// Since MySQL does not support aliasing the insert target table,
+		// we must detect column reference that are used in the conflict clause
+		// and use the table expression as qualifier instead
+		if ( getClauseStack().getCurrent() != Clause.SET
+				|| !( ( currentDmlStatement = getCurrentDmlStatement() ) instanceof InsertSelectStatement )
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
+		// Qualify the column reference with the table expression also when in subqueries
+		else if ( qualifierSupport != DmlTargetColumnQualifierSupport.NONE || !getQueryPartStack().isEmpty() ) {
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
+		}
+		else {
+			return null;
+		}
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -234,13 +390,13 @@ public class MySQLLegacySqlAstTranslator<T extends JdbcOperation> extends Abstra
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getDialect().getVersion().isSameOrAfter( 8 ) ? "" : getFromDual();
+		return getDialect().getVersion().isSameOrAfter( 8 ) ? "" : ( " from " + getDual() );
 	}
 
 	@Override

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/OracleLegacyDialect.java

@@ -1008,6 +1008,7 @@ public class OracleLegacyDialect extends Dialect {
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
+			final String constraintName;
 			// interpreting Oracle exceptions is much much more precise based on their specific vendor codes.
 			switch ( JdbcExceptionHelper.extractErrorCode( sqlException ) ) {
 
@@ -1040,9 +1041,19 @@ public class OracleLegacyDialect extends Dialect {
 
 				// data integrity violation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+				case 1:
+					// ORA-00001: unique constraint violated
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
 				case 1407:
 					// ORA-01407: cannot update column to NULL
-					final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
 					return new ConstraintViolationException( message, sqlException, sql, constraintName );
 
 				default:
@@ -1520,4 +1531,9 @@ public class OracleLegacyDialect extends Dialect {
 	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
 		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
 	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/OracleLegacySqlAstTranslator.java

@@ -37,10 +37,12 @@ import org.hibernate.sql.ast.tree.expression.SqlTupleContainer;
 import org.hibernate.sql.ast.tree.expression.Summarization;
 import org.hibernate.sql.ast.tree.from.FromClause;
 import org.hibernate.sql.ast.tree.from.FunctionTableReference;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.UnionTableGroup;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.predicate.InSubQueryPredicate;
@@ -51,6 +53,7 @@ import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
 import org.hibernate.sql.ast.tree.select.SortSpecification;
 import org.hibernate.sql.ast.tree.update.Assignment;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.results.internal.SqlSelectionImpl;
 import org.hibernate.type.SqlTypes;
@@ -67,6 +70,54 @@ public class OracleLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateInlineView( statement );
+		}
+		else {
+			renderUpdateClause( statement );
+			renderSetClause( statement.getAssignments() );
+			visitWhereClause( statement.getRestriction() );
+			visitReturningColumns( statement.getReturningColumns() );
+		}
+	}
+
+	@Override
+	protected void renderMergeUpdateClause(List<Assignment> assignments, Predicate wherePredicate) {
+		appendSql( " then update" );
+		renderSetClause( assignments );
+		visitWhereClause( wherePredicate );
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean needsRecursiveKeywordInWithClause() {
 		return false;
@@ -227,8 +278,15 @@ public class OracleLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 
 	@Override
 	protected void visitValuesList(List<Values> valuesList) {
+		if ( valuesList.size() < 2 ) {
+			visitValuesListStandard( valuesList );
+		}
+		else {
+			// Oracle doesn't support a multi-values insert
+			// So we render a select union emulation instead
 			visitValuesListEmulateSelectUnion( valuesList );
 		}
+	}
 
 	@Override
 	public void visitValuesTableReference(ValuesTableReference tableReference) {
@@ -617,13 +675,13 @@ public class OracleLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/PostgreSQLLegacyDialect.java

@@ -732,6 +732,11 @@ public class PostgreSQLLegacyDialect extends Dialect {
 		return getVersion().isSameOrAfter( 9, 1 );
 	}
 
+	@Override
+	public boolean supportsConflictClauseForInsertCTE() {
+		return getVersion().isSameOrAfter( 9, 5 );
+	}
+
 	@Override
 	public SequenceSupport getSequenceSupport() {
 		return getVersion().isBefore( 8, 2 )
@@ -1467,4 +1472,14 @@ public class PostgreSQLLegacyDialect extends Dialect {
 		// The maximum scale for `interval second` is 6 unfortunately
 		return 6;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/PostgreSQLLegacySqlAstTranslator.java

@@ -10,6 +10,7 @@ import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteMaterialization;
@@ -18,13 +19,20 @@ import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.predicate.NullnessPredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 import org.hibernate.sql.model.internal.TableInsertStandard;
 import org.hibernate.type.SqlTypes;
 
@@ -45,6 +53,56 @@ public class PostgreSQLLegacySqlAstTranslator<T extends JdbcOperation> extends A
 		appendSql( "default values" );
 	}
 
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void renderTableReferenceIdentificationVariable(TableReference tableReference) {
+		final String identificationVariable = tableReference.getIdentificationVariable();
+		if ( identificationVariable != null ) {
+			final Clause currentClause = getClauseStack().getCurrent();
+			if ( currentClause == Clause.INSERT ) {
+				// PostgreSQL requires the "as" keyword for inserts
+				appendSql( " as " );
+			}
+			else {
+				append( WHITESPACE );
+			}
+			append( tableReference.getIdentificationVariable() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		final Statement currentStatement = getStatementStack().getCurrent();
+		if ( !( currentStatement instanceof UpdateStatement )
+				|| !hasNonTrivialFromClause( ( (UpdateStatement) currentStatement ).getFromClause() ) ) {
+			// For UPDATE statements we render a full FROM clause and a join condition to match target table rows,
+			// but for that to work, we have to omit the alias for the target table reference here
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseJoiningDmlTargetReference( statement );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitStandardConflictClause( conflictClause );
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -218,9 +276,7 @@ public class PostgreSQLLegacySqlAstTranslator<T extends JdbcOperation> extends A
 				appendSql( "()" );
 			}
 			else {
-				appendSql( "(select 1" );
-				appendSql( getFromDualForSelectOnly() );
-				appendSql( ')' );
+				appendSql( "(select 1)" );
 			}
 		}
 		else if ( expression instanceof Summarization ) {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/RDMSOS2200SqlAstTranslator.java

@@ -126,12 +126,12 @@ public class RDMSOS2200SqlAstTranslator<T extends JdbcOperation> extends Abstrac
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from rdms.rdms_dummy where key_col=1";
+	protected String getDual() {
+		return "rdms.rdms_dummy";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual() + " where key_col=1";
 	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SQLServerLegacyDialect.java

@@ -16,6 +16,7 @@ import org.hibernate.boot.model.relational.SqlStringGenerationContext;
 import org.hibernate.dialect.AbstractTransactSQLDialect;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.dialect.Dialect;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.Replacer;
 import org.hibernate.dialect.TimeZoneSupport;
 import org.hibernate.dialect.function.CommonFunctionFactory;
@@ -41,8 +42,11 @@ import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.jdbc.env.spi.NameQualifierSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.mapping.Column;
 import org.hibernate.query.sqm.CastType;
@@ -85,6 +89,7 @@ import java.util.TimeZone;
 
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
 import static org.hibernate.query.sqm.TemporalUnit.NANOSECOND;
 import static org.hibernate.query.sqm.produce.function.FunctionParameterType.INTEGER;
 import static org.hibernate.type.SqlTypes.*;
@@ -723,6 +728,20 @@ public class SQLServerLegacyDialect extends AbstractTransactSQLDialect {
 	public boolean supportsFetchClause(FetchClauseType type) {
 		return getVersion().isSameOrAfter( 11 );
 	}
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor(
+				sqle -> {
+					switch ( JdbcExceptionHelper.extractErrorCode( sqle ) ) {
+						case 2627:
+						case 2601:
+							return extractUsingTemplate( "'", "'", sqle.getMessage() );
+						default:
+							return null;
+					}
+				}
+		);
+	}
 
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
@@ -740,6 +759,13 @@ public class SQLServerLegacyDialect extends AbstractTransactSQLDialect {
 				case 1222:
 					return new LockTimeoutException( message, sqlException, sql );
 				case 2627:
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+					);
 				case 2601:
 					return new ConstraintViolationException(
 							message,

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SQLServerLegacySqlAstTranslator.java

@@ -12,15 +12,20 @@ import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.dialect.DatabaseVersion;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstJoinType;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
@@ -30,12 +35,15 @@ import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.TableReference;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
 import org.hibernate.sql.ast.tree.select.SortSpecification;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.type.SqlTypes;
 
@@ -54,6 +62,84 @@ public class SQLServerLegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+			appendSql( ';' );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		appendSql( "update" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.UPDATE );
+			renderTableReferenceIdentificationVariable( updateStatement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		if ( statement.getFromClause().getRoots().isEmpty() ) {
+			appendSql( " from " );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+		}
+		else {
+			visitFromClause( statement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean needsRecursiveKeywordInWithClause() {
 		return false;
@@ -129,14 +215,7 @@ public class SQLServerLegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseASELegacyDialect.java

@@ -628,27 +628,17 @@ public class SybaseASELegacyDialect extends SybaseLegacyDialect {
 				final int errorCode = JdbcExceptionHelper.extractErrorCode( sqle );
 				if ( sqlState != null ) {
 					switch ( sqlState ) {
-						// UNIQUE VIOLATION
 						case "S1000":
-							if ( 2601 == errorCode ) {
-								return extractUsingTemplate( "with unique index '", "'", sqle.getMessage() );
-							}
-							break;
 						case "23000":
-							if ( 546 == errorCode ) {
+							switch ( errorCode ) {
+								case 2601:
+									// UNIQUE VIOLATION
+									return extractUsingTemplate( "with unique index '", "'", sqle.getMessage() );
+								case 546:
 									// Foreign key violation
 									return extractUsingTemplate( "constraint name = '", "'", sqle.getMessage() );
 							}
 							break;
-//					// FOREIGN KEY VIOLATION
-//					case 23503:
-//						return extractUsingTemplate( "violates foreign key constraint \"","\"", sqle.getMessage() );
-//					// NOT NULL VIOLATION
-//					case 23502:
-//						return extractUsingTemplate( "null value in column \"","\" violates not-null constraint", sqle.getMessage() );
-//					// TODO: RESTRICT VIOLATION
-//					case 23001:
-//						return null;
 					}
 				}
 				return null;
@@ -659,7 +649,6 @@ public class SybaseASELegacyDialect extends SybaseLegacyDialect {
 		if ( getVersion().isBefore( 15, 7 ) ) {
 			return null;
 		}
-
 		return (sqlException, message, sql) -> {
 			final String sqlState = JdbcExceptionHelper.extractSqlState( sqlException );
 			final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
@@ -669,30 +658,44 @@ public class SybaseASELegacyDialect extends SybaseLegacyDialect {
 					case "JZ006":
 						return new LockTimeoutException( message, sqlException, sql );
 					case "S1000":
+					case "23000":
 						switch ( errorCode ) {
 							case 515:
 								// Attempt to insert NULL value into column; column does not allow nulls.
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
+							case 546:
+								// Foreign key violation
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
 							case 2601:
 								// Unique constraint violation
-								final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-										sqlException );
-								return new ConstraintViolationException( message, sqlException, sql, constraintName );
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										ConstraintViolationException.ConstraintKind.UNIQUE,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
 						}
 						break;
 					case "ZZZZZ":
 						if ( 515 == errorCode ) {
 							// Attempt to insert NULL value into column; column does not allow nulls.
-							final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-									sqlException );
-							return new ConstraintViolationException( message, sqlException, sql, constraintName );
-						}
-						break;
-					case "23000":
-						if ( 546 == errorCode ) {
-							// Foreign key violation
-							final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-									sqlException );
-							return new ConstraintViolationException( message, sqlException, sql, constraintName );
+							return new ConstraintViolationException(
+									message,
+									sqlException,
+									sql,
+									getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+							);
 						}
 						break;
 				}

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseASELegacySqlAstTranslator.java

@@ -11,14 +11,19 @@ import java.util.function.Consumer;
 
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstJoinType;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
@@ -33,6 +38,9 @@ import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
@@ -40,6 +48,7 @@ import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 
 /**
@@ -55,6 +64,77 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+				renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		appendSql( "update " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.UPDATE );
+			renderDmlTargetTableExpression( updateStatement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		if ( statement.getFromClause().getRoots().isEmpty() ) {
+			appendSql( " from " );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+		}
+		else {
+			visitFromClause( statement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClause() {
 		return false;
@@ -130,14 +210,7 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );
@@ -252,6 +325,14 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 		visitValuesListEmulateSelectUnion( valuesList );
 	}
 
+	@Override
+	public void visitValuesTableReference(ValuesTableReference tableReference) {
+		append( '(' );
+		visitValuesListEmulateSelectUnion( tableReference.getValuesList() );
+		append( ')' );
+		renderDerivedTableReference( tableReference );
+	}
+
 	@Override
 	public void visitOffsetFetchClause(QueryPart queryPart) {
 		assertRowsOnlyFetchClauseType( queryPart );
@@ -386,9 +467,16 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 	}
 
 	@Override
-	public void visitColumnReference(ColumnReference columnReference) {
-		final String dmlTargetTableAlias = getDmlTargetTableAlias();
-		if ( dmlTargetTableAlias != null && dmlTargetTableAlias.equals( columnReference.getQualifier() ) ) {
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		if ( qualifierSupport == DmlTargetColumnQualifierSupport.TABLE_ALIAS
+				|| ( currentDmlStatement = getCurrentDmlStatement() ) == null
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
 		// Sybase needs a table name prefix
 		// but not if this is a restricted union table reference subquery
 		final QuerySpec currentQuerySpec = (QuerySpec) getQueryPartStack().getCurrent();
@@ -396,53 +484,15 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 		if ( currentQuerySpec != null && !currentQuerySpec.isRoot()
 				&& (roots = currentQuerySpec.getFromClause().getRoots()).size() == 1
 				&& roots.get( 0 ).getPrimaryTableReference() instanceof UnionTableReference ) {
-				columnReference.appendReadExpression( this );
+			return columnReference.getQualifier();
 		}
-			// for now, use the unqualified form
 		else if ( columnReference.isColumnExpressionFormula() ) {
 			// For formulas, we have to replace the qualifier as the alias was already rendered into the formula
 			// This is fine for now as this is only temporary anyway until we render aliases for table references
-				appendSql(
-						columnReference.getColumnExpression()
-								.replaceAll( "(\\b)(" + dmlTargetTableAlias + "\\.)(\\b)", "$1$3" )
-				);
+			return null;
 		}
 		else {
-				columnReference.appendReadExpression(
-						this,
-						getCurrentDmlStatement().getTargetTable().getTableExpression()
-				);
-			}
-		}
-		else {
-			columnReference.appendReadExpression( this );
-		}
-	}
-
-	@Override
-	public void visitAggregateColumnWriteExpression(AggregateColumnWriteExpression aggregateColumnWriteExpression) {
-		final String dmlTargetTableAlias = getDmlTargetTableAlias();
-		final ColumnReference columnReference = aggregateColumnWriteExpression.getColumnReference();
-		if ( dmlTargetTableAlias != null && dmlTargetTableAlias.equals( columnReference.getQualifier() ) ) {
-			// Sybase needs a table name prefix
-			// but not if this is a restricted union table reference subquery
-			final QuerySpec currentQuerySpec = (QuerySpec) getQueryPartStack().getCurrent();
-			final List<TableGroup> roots;
-			if ( currentQuerySpec != null && !currentQuerySpec.isRoot()
-					&& (roots = currentQuerySpec.getFromClause().getRoots()).size() == 1
-					&& roots.get( 0 ).getPrimaryTableReference() instanceof UnionTableReference ) {
-				aggregateColumnWriteExpression.appendWriteExpression( this, this );
-			}
-			else {
-				aggregateColumnWriteExpression.appendWriteExpression(
-						this,
-						this,
-						getCurrentDmlStatement().getTargetTable().getTableExpression()
-				);
-			}
-		}
-		else {
-			aggregateColumnWriteExpression.appendWriteExpression( this, this );
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
 		}
 	}
 
@@ -472,8 +522,8 @@ public class SybaseASELegacySqlAstTranslator<T extends JdbcOperation> extends Ab
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from (select 1) dual(c1)";
+	protected String getDual() {
+		return "(select 1 c1)";
 	}
 
 	private boolean supportsTopClause() {

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseAnywhereSqlAstTranslator.java

@@ -116,14 +116,7 @@ public class SybaseAnywhereSqlAstTranslator<T extends JdbcOperation> extends Abs
 				appendSql( " )" );
 
 				registerAffectedTable( tableReference );
-				final Clause currentClause = getClauseStack().getCurrent();
-				if ( rendersTableReferenceAlias( currentClause ) ) {
-					final String identificationVariable = tableReference.getIdentificationVariable();
-					if ( identificationVariable != null ) {
-						appendSql( ' ' );
-						appendSql( identificationVariable );
-					}
-				}
+				renderTableReferenceIdentificationVariable( tableReference );
 			}
 			else {
 				super.renderNamedTableReference( tableReference, lockMode );
@@ -248,12 +241,12 @@ public class SybaseAnywhereSqlAstTranslator<T extends JdbcOperation> extends Abs
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from sys.dummy";
+	protected String getDual() {
+		return "sys.dummy";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseLegacyDialect.java

@@ -18,6 +18,7 @@ import org.hibernate.boot.model.FunctionContributions;
 import org.hibernate.boot.model.TypeContributions;
 import org.hibernate.dialect.AbstractTransactSQLDialect;
 import org.hibernate.dialect.DatabaseVersion;
+import org.hibernate.dialect.DmlTargetColumnQualifierSupport;
 import org.hibernate.dialect.NationalizationSupport;
 import org.hibernate.dialect.SybaseDriverKind;
 import org.hibernate.dialect.function.CommonFunctionFactory;
@@ -473,4 +474,14 @@ public class SybaseLegacyDialect extends AbstractTransactSQLDialect {
 		// Only the jTDS driver supports named parameters properly
 		return driverKind == SybaseDriverKind.JTDS && super.supportsNamedParameters( databaseMetaData );
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-community-dialects/src/main/java/org/hibernate/community/dialect/SybaseLegacySqlAstTranslator.java

@@ -11,6 +11,8 @@ import java.util.function.Consumer;
 
 import org.hibernate.LockMode;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
@@ -18,6 +20,7 @@ import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteStatement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
@@ -27,8 +30,13 @@ import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
 import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
+import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 
 /**
@@ -44,6 +52,46 @@ public class SybaseLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+			appendSql( ';' );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+		visitFromClause( statement.getFromClause() );
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		visitFromClause( statement.getFromClause() );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClause() {
 		return false;
@@ -119,14 +167,7 @@ public class SybaseLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );
@@ -147,6 +188,19 @@ public class SybaseLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 		// Sybase does not support the FOR UPDATE clause
 	}
 
+	@Override
+	protected void visitValuesList(List<Values> valuesList) {
+		visitValuesListEmulateSelectUnion( valuesList );
+	}
+
+	@Override
+	public void visitValuesTableReference(ValuesTableReference tableReference) {
+		append( '(' );
+		visitValuesListEmulateSelectUnion( tableReference.getValuesList() );
+		append( ')' );
+		renderDerivedTableReference( tableReference );
+	}
+
 	@Override
 	public void visitOffsetFetchClause(QueryPart queryPart) {
 		assertRowsOnlyFetchClauseType( queryPart );

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlLexer.g4

@@ -158,6 +158,8 @@ BY					: [bB] [yY];
 CASE				: [cC] [aA] [sS] [eE];
 CAST				: [cC] [aA] [sS] [tT];
 COLLATE				: [cC] [oO] [lL] [lL] [aA] [tT] [eE];
+CONFLICT			: [cC] [oO] [nN] [fF] [lL] [iI] [cC] [tT];
+CONSTRAINT			: [cC] [oO] [nN] [sS] [tT] [rR] [aA] [iI] [nN] [tT];
 COUNT				: [cC] [oO] [uU] [nN] [tT];
 CROSS				: [cC] [rR] [oO] [sS] [sS];
 CUBE				: [cC] [uU] [bB] [eE];
@@ -175,6 +177,7 @@ DELETE				: [dD] [eE] [lL] [eE] [tT] [eE];
 DEPTH	 			: [dD] [eE] [pP] [tT] [hH];
 DESC				: [dD] [eE] [sS] [cC];
 DISTINCT			: [dD] [iI] [sS] [tT] [iI] [nN] [cC] [tT];
+DO					: [dD] [oO];
 ELEMENT				: [eE] [lL] [eE] [mM] [eE] [nN] [tT];
 ELEMENTS			: [eE] [lL] [eE] [mM] [eE] [nN] [tT] [sS];
 ELSE				: [eE] [lL] [sS] [eE];
@@ -246,6 +249,7 @@ NEW					: [nN] [eE] [wW];
 NEXT				: [nN] [eE] [xX] [tT];
 NO					: [nN] [oO];
 NOT					: [nN] [oO] [tT];
+NOTHING				: [nN] [oO] [tT] [hH] [iI] [nN] [gG];
 NULLS				: [nN] [uU] [lL] [lL] [sS];
 OBJECT				: [oO] [bB] [jJ] [eE] [cC] [tT];
 OF					: [oO] [fF];

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlParser.g4

@@ -83,7 +83,7 @@ assignment
  * An 'insert' statement
  */
 insertStatement
-	: INSERT INTO? targetEntity targetFields (queryExpression | valuesList)
+	: INSERT INTO? targetEntity targetFields (queryExpression | valuesList) conflictClause?
 	;
 
 /**
@@ -107,6 +107,18 @@ values
 	: LEFT_PAREN expressionOrPredicate (COMMA expressionOrPredicate)* RIGHT_PAREN
 	;
 
+/**
+ * a 'conflict' clause in an 'insert' statement
+ */
+conflictClause: ON CONFLICT conflictTarget? conflictAction;
+conflictTarget
+	: ON CONSTRAINT identifier
+	| LEFT_PAREN simplePath (COMMA simplePath)* RIGHT_PAREN;
+conflictAction
+	: DO NOTHING
+	| DO UPDATE setClause whereClause?
+	;
+
 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 // QUERY SPEC - general structure of root sqm or sub sqm
 
@@ -1600,6 +1612,8 @@ rollup
 	| CASE
 	| CAST
 	| COLLATE
+	| CONFLICT
+	| CONSTRAINT
 	| COUNT
 	| CROSS
 	| CUBE
@@ -1617,6 +1631,7 @@ rollup
 	| DEPTH
 	| DESC
 	| DISTINCT
+	| DO
 	| ELEMENT
 	| ELEMENTS
 	| ELSE
@@ -1690,6 +1705,7 @@ rollup
 	| NEXT
 	| NO
 	| NOT
+	| NOTHING
 	| NULLS
 	| OBJECT
 	| OF

hibernate-core/src/main/java/org/hibernate/boot/registry/selector/internal/DefaultDialectSelector.java

@@ -21,6 +21,7 @@ import org.hibernate.dialect.Dialect;
 import org.hibernate.dialect.H2Dialect;
 import org.hibernate.dialect.HANACloudColumnStoreDialect;
 import org.hibernate.dialect.HANAColumnStoreDialect;
+import org.hibernate.dialect.HANADialect;
 import org.hibernate.dialect.HANARowStoreDialect;
 import org.hibernate.dialect.HSQLDialect;
 import org.hibernate.dialect.MariaDBDialect;
@@ -70,6 +71,8 @@ public class DefaultDialectSelector implements DialectSelector {
 				return findCommunityDialect( name );
 			case "H2":
 				return H2Dialect.class;
+			case "HANA":
+				return HANADialect.class;
 			case "HANACloudColumnStore":
 				return HANACloudColumnStoreDialect.class;
 			case "HANAColumnStore":

hibernate-core/src/main/java/org/hibernate/cfg/DialectSpecificSettings.java

@@ -57,4 +57,12 @@ public interface DialectSpecificSettings {
 	 */
 	public static final String COCKROACH_VERSION_STRING = "hibernate.dialect.cockroach.version_string";
 
+	/**
+	 * Specifies the LOB prefetch size. LOBs larger than this value will be read into memory as the HANA JDBC driver closes
+	 * the LOB when the result set is closed.
+	 *
+	 * @settingDefault {@code 1024}
+	 */
+	public static final String HANA_MAX_LOB_PREFETCH_SIZE = "hibernate.dialect.hana.max_lob_prefetch_size";
+
 }

hibernate-core/src/main/java/org/hibernate/dialect/AbstractHANADialect.java

@@ -20,20 +20,20 @@ import java.nio.charset.StandardCharsets;
 import java.sql.Blob;
 import java.sql.CallableStatement;
 import java.sql.Clob;
-import java.sql.Connection;
 import java.sql.DatabaseMetaData;
 import java.sql.NClob;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.SQLFeatureNotSupportedException;
-import java.sql.Statement;
 import java.sql.Types;
 import java.time.temporal.TemporalAccessor;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.TimeZone;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -54,6 +54,8 @@ import org.hibernate.dialect.pagination.LimitHandler;
 import org.hibernate.dialect.pagination.LimitOffsetLimitHandler;
 import org.hibernate.dialect.sequence.HANASequenceSupport;
 import org.hibernate.dialect.sequence.SequenceSupport;
+import org.hibernate.dialect.temptable.TemporaryTable;
+import org.hibernate.dialect.temptable.TemporaryTableKind;
 import org.hibernate.engine.config.spi.ConfigurationService;
 import org.hibernate.engine.config.spi.StandardConverters;
 import org.hibernate.engine.jdbc.BinaryStream;
@@ -61,7 +63,6 @@ import org.hibernate.engine.jdbc.BlobImplementer;
 import org.hibernate.engine.jdbc.CharacterStream;
 import org.hibernate.engine.jdbc.ClobImplementer;
 import org.hibernate.engine.jdbc.NClobImplementer;
-import org.hibernate.engine.jdbc.connections.spi.ConnectionProvider;
 import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
 import org.hibernate.engine.jdbc.env.spi.IdentifierCaseStrategy;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
@@ -73,15 +74,19 @@ import org.hibernate.exception.LockAcquisitionException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.SQLGrammarException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
-import org.hibernate.internal.CoreLogging;
-import org.hibernate.internal.CoreMessageLogger;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.mapping.Table;
+import org.hibernate.metamodel.mapping.EntityMappingType;
+import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
 import org.hibernate.procedure.internal.StandardCallableStatementSupport;
 import org.hibernate.procedure.spi.CallableStatementSupport;
 import org.hibernate.query.sqm.CastType;
 import org.hibernate.query.sqm.IntervalType;
 import org.hibernate.query.sqm.TemporalUnit;
+import org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableInsertStrategy;
+import org.hibernate.query.sqm.mutation.internal.temptable.GlobalTemporaryTableMutationStrategy;
+import org.hibernate.query.sqm.mutation.spi.SqmMultiTableInsertStrategy;
+import org.hibernate.query.sqm.mutation.spi.SqmMultiTableMutationStrategy;
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.service.ServiceRegistry;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
@@ -121,6 +126,7 @@ import org.hibernate.type.spi.TypeConfiguration;
 
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.query.sqm.produce.function.FunctionParameterType.ANY;
 import static org.hibernate.type.SqlTypes.BINARY;
 import static org.hibernate.type.SqlTypes.BOOLEAN;
 import static org.hibernate.type.SqlTypes.CHAR;
@@ -160,15 +166,15 @@ import static org.hibernate.type.descriptor.DateTimeUtils.appendAsTimestampWithM
  * <p>
  * Note: This dialect is configured to create foreign keys with {@code on update cascade}.
  *
+ * @deprecated Will be replaced with {@link HANADialect} in the future.
  * @author Andrew Clemons
  * @author Jonathan Bregler
  */
+@Deprecated(forRemoval = true)
 public abstract class AbstractHANADialect extends Dialect {
-	private static final CoreMessageLogger LOG = CoreLogging.messageLogger( AbstractHANADialect.class );
 
-	// Set the LOB prefetch size. LOBs larger than this value will be read into memory as the HANA JDBC driver closes
-	// the LOB when the result set is closed.
-	private static final String MAX_LOB_PREFETCH_SIZE_PARAMETER_NAME = "hibernate.dialect.hana.max_lob_prefetch_size";
+	// Use column or row tables by default
+	public static final String USE_DEFAULT_TABLE_TYPE_COLUMN = "hibernate.dialect.hana.use_default_table_type_column";
 	// Use TINYINT instead of the native BOOLEAN type
 	private static final String USE_LEGACY_BOOLEAN_TYPE_PARAMETER_NAME = "hibernate.dialect.hana.use_legacy_boolean_type";
 	// Use unicode (NVARCHAR, NCLOB, etc.) instead of non-unicode (VARCHAR, CLOB) string types
@@ -177,18 +183,15 @@ public abstract class AbstractHANADialect extends Dialect {
 	// JDBC driver (https://service.sap.com/sap/support/notes/2590160)
 	private static final String TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_PARAMETER_NAME = "hibernate.dialect.hana.treat_double_typed_fields_as_decimal";
 
-	private static final int MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE = 1024;
 	private static final Boolean USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE = Boolean.FALSE;
 	private static final Boolean TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE = Boolean.FALSE;
 
-	private HANANClobJdbcType nClobTypeDescriptor = new HANANClobJdbcType( MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
-
-	private HANABlobType blobTypeDescriptor = new HANABlobType( MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
-
-	private HANAClobJdbcType clobTypeDescriptor;
+	private final int maxLobPrefetchSize;
 
+	private boolean defaultTableTypeColumn;
 	private boolean useLegacyBooleanType = USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE;
 	private boolean useUnicodeStringTypes;
+	private boolean treatDoubleTypedFieldsAsDecimal;
 
 	/*
 	 * Tables named "TYPE" need to be quoted
@@ -232,15 +235,57 @@ public abstract class AbstractHANADialect extends Dialect {
 		}
 	};
 
-	public AbstractHANADialect(DatabaseVersion version) {
-		super( version );
 
+	public AbstractHANADialect(DatabaseVersion version) {
+		this( new HANAServerConfiguration( version ), true );
+	}
+
+	public AbstractHANADialect(HANAServerConfiguration configuration, boolean defaultTableTypeColumn) {
+		super( configuration.getFullVersion() );
+		this.defaultTableTypeColumn = defaultTableTypeColumn;
+		this.maxLobPrefetchSize = configuration.getMaxLobPrefetchSize();
 		this.useUnicodeStringTypes = useUnicodeStringTypesDefault();
-		this.clobTypeDescriptor = new HANAClobJdbcType(
-				MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE,
+	}
+
+	@Override
+	public void contribute(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
+		// This is the best hook for consuming dialect configuration that we have for now,
+		// since this method is called very early in the bootstrap process
+		final ConfigurationService configurationService = serviceRegistry.getService( ConfigurationService.class );
+		assert configurationService != null;
+
+		this.defaultTableTypeColumn = configurationService.getSetting(
+				USE_DEFAULT_TABLE_TYPE_COLUMN,
+				StandardConverters.BOOLEAN,
+				this.defaultTableTypeColumn
+		);
+		if ( supportsAsciiStringTypes() ) {
+			this.useUnicodeStringTypes = configurationService.getSetting(
+					USE_UNICODE_STRING_TYPES_PARAMETER_NAME,
+					StandardConverters.BOOLEAN,
 					useUnicodeStringTypesDefault()
 			);
 		}
+		this.useLegacyBooleanType = configurationService.getSetting(
+				USE_LEGACY_BOOLEAN_TYPE_PARAMETER_NAME,
+				StandardConverters.BOOLEAN,
+				USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE
+		);
+		this.treatDoubleTypedFieldsAsDecimal = configurationService.getSetting(
+				TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_PARAMETER_NAME,
+				StandardConverters.BOOLEAN,
+				TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE
+		);
+		super.contribute( typeContributions, serviceRegistry );
+	}
+
+	protected boolean isDefaultTableTypeColumn() {
+		return defaultTableTypeColumn;
+	}
+
+	protected boolean isCloud() {
+		return getVersion().isSameOrAfter( 4 );
+	}
 
 	@Override
 	protected String columnType(int sqlTypeCode) {
@@ -280,20 +325,6 @@ public abstract class AbstractHANADialect extends Dialect {
 
 	@Override
 	protected void registerColumnTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
-		final ConfigurationService configurationService = serviceRegistry.getService( ConfigurationService.class );
-		if ( supportsAsciiStringTypes() ) {
-			this.useUnicodeStringTypes = configurationService.getSetting(
-					USE_UNICODE_STRING_TYPES_PARAMETER_NAME,
-					StandardConverters.BOOLEAN,
-					useUnicodeStringTypesDefault()
-			);
-		}
-		this.useLegacyBooleanType = configurationService.getSetting(
-				USE_LEGACY_BOOLEAN_TYPE_PARAMETER_NAME,
-				StandardConverters.BOOLEAN,
-				USE_LEGACY_BOOLEAN_TYPE_DEFAULT_VALUE
-		);
-
 		super.registerColumnTypes( typeContributions, serviceRegistry );
 		final DdlTypeRegistry ddlTypeRegistry = typeContributions.getTypeConfiguration().getDdlTypeRegistry();
 
@@ -320,24 +351,12 @@ public abstract class AbstractHANADialect extends Dialect {
 		return false;
 	}
 
+	/**
+	 * @deprecated Use {@link HANAServerConfiguration#fromDialectResolutionInfo(DialectResolutionInfo)} instead
+	 */
+	@Deprecated(forRemoval = true)
 	protected static DatabaseVersion createVersion(DialectResolutionInfo info) {
-		// Parse the version according to https://answers.sap.com/questions/9760991/hana-sps-version-check.html
-		final String versionString = info.getDatabaseVersion();
-		int majorVersion = 1;
-		int minorVersion = 0;
-		int patchLevel = 0;
-		final String[] components = versionString.split( "\\." );
-		if ( components.length >= 3 ) {
-			try {
-				majorVersion = Integer.parseInt( components[0] );
-				minorVersion = Integer.parseInt( components[1] );
-				patchLevel = Integer.parseInt( components[2] );
-			}
-			catch (NumberFormatException ex) {
-				// Ignore
-			}
-		}
-		return DatabaseVersion.make( majorVersion, minorVersion, patchLevel );
+		return HANAServerConfiguration.fromDialectResolutionInfo( info ).getFullVersion();
 	}
 
 	@Override
@@ -434,6 +453,22 @@ public abstract class AbstractHANADialect extends Dialect {
 
 		functionContributions.getFunctionRegistry().register( "timestampadd",
 				new IntegralTimestampaddFunction( this, typeConfiguration ) );
+
+		// full-text search functions
+		functionContributions.getFunctionRegistry().registerNamed(
+				"score",
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE )
+		);
+		functionContributions.getFunctionRegistry().registerNamed( "snippets" );
+		functionContributions.getFunctionRegistry().registerNamed( "highlighted" );
+		functionContributions.getFunctionRegistry().registerBinaryTernaryPattern(
+				"contains",
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN ),
+				"contains(?1,?2)",
+				"contains(?1,?2,?3)",
+				ANY, ANY, ANY,
+				typeConfiguration
+		);
 	}
 
 	@Override
@@ -526,7 +561,15 @@ public abstract class AbstractHANADialect extends Dialect {
 				final String constraintName = getViolatedConstraintNameExtractor()
 						.extractConstraintName( sqlException );
 
-				return new ConstraintViolationException( message, sqlException, sql, constraintName );
+				return new ConstraintViolationException(
+						message,
+						sqlException,
+						sql,
+						errorCode == 301
+								? ConstraintViolationException.ConstraintKind.UNIQUE
+								: ConstraintViolationException.ConstraintKind.OTHER,
+						constraintName
+				);
 			}
 
 			return null;
@@ -538,6 +581,11 @@ public abstract class AbstractHANADialect extends Dialect {
 		return RowLockStrategy.COLUMN;
 	}
 
+	@Override
+	public String getCreateTableString() {
+		return isDefaultTableTypeColumn() ? "create column table" : "create row table";
+	}
+
 	@Override
 	public String getAddColumnString() {
 		return "add (";
@@ -621,6 +669,7 @@ public abstract class AbstractHANADialect extends Dialect {
 	@Override
 	protected void registerDefaultKeywords() {
 		super.registerDefaultKeywords();
+		// https://help.sap.com/docs/SAP_HANA_PLATFORM/4fe29514fd584807ac9f2a04f6754767/28bcd6af3eb6437892719f7c27a8a285.html?locale=en-US
 		registerKeyword( "all" );
 		registerKeyword( "alter" );
 		registerKeyword( "as" );
@@ -668,6 +717,7 @@ public abstract class AbstractHANADialect extends Dialect {
 		registerKeyword( "into" );
 		registerKeyword( "is" );
 		registerKeyword( "join" );
+		registerKeyword( "lateral" );
 		registerKeyword( "leading" );
 		registerKeyword( "left" );
 		registerKeyword( "limit" );
@@ -706,6 +756,29 @@ public abstract class AbstractHANADialect extends Dialect {
 		registerKeyword( "where" );
 		registerKeyword( "while" );
 		registerKeyword( "with" );
+		if ( isCloud() ) {
+			// https://help.sap.com/docs/hana-cloud-database/sap-hana-cloud-sap-hana-database-sql-reference-guide/reserved-words
+			registerKeyword( "array" );
+			registerKeyword( "at" );
+			registerKeyword( "authorization" );
+			registerKeyword( "between" );
+			registerKeyword( "by" );
+			registerKeyword( "collate" );
+			registerKeyword( "empty" );
+			registerKeyword( "filter" );
+			registerKeyword( "grouping" );
+			registerKeyword( "no" );
+			registerKeyword( "not" );
+			registerKeyword( "of" );
+			registerKeyword( "over" );
+			registerKeyword( "recursive" );
+			registerKeyword( "row" );
+			registerKeyword( "table" );
+			registerKeyword( "to" );
+			registerKeyword( "unnest" );
+			registerKeyword( "window" );
+			registerKeyword( "within" );
+		}
 	}
 
 	@Override
@@ -930,112 +1003,29 @@ public abstract class AbstractHANADialect extends Dialect {
 	public void contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
 		super.contributeTypes( typeContributions, serviceRegistry );
 
-		final ConnectionProvider connectionProvider = serviceRegistry.getService( ConnectionProvider.class );
-
-		int maxLobPrefetchSizeDefault = MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE;
-		if ( connectionProvider != null ) {
-			Connection conn = null;
-			try {
-				conn = connectionProvider.getConnection();
-				try ( Statement statement = conn.createStatement() ) {
-					try ( ResultSet rs = statement.executeQuery(
-							"SELECT TOP 1 VALUE,MAP(LAYER_NAME,'DEFAULT',1,'SYSTEM',2,'DATABASE',3,4) AS LAYER FROM SYS.M_INIFILE_CONTENTS WHERE FILE_NAME='indexserver.ini' AND SECTION='session' AND KEY='max_lob_prefetch_size' ORDER BY LAYER DESC" ) ) {
-						// This only works if the current user has the privilege INIFILE ADMIN
-						if ( rs.next() ) {
-							maxLobPrefetchSizeDefault = rs.getInt( 1 );
-						}
-					}
-				}
-			}
-			catch (Exception e) {
-				LOG.debug(
-						"An error occurred while trying to determine the value of the HANA parameter indexserver.ini / session / max_lob_prefetch_size. Using the default value "
-								+ maxLobPrefetchSizeDefault,
-						e );
-			}
-			finally {
-				if ( conn != null ) {
-					try {
-						connectionProvider.closeConnection( conn );
-					}
-					catch (SQLException e) {
-						// ignore
-					}
-				}
-			}
-		}
-
-		final ConfigurationService configurationService = serviceRegistry.getService( ConfigurationService.class );
-		int maxLobPrefetchSize = configurationService.getSetting(
-				MAX_LOB_PREFETCH_SIZE_PARAMETER_NAME,
-				value -> Integer.valueOf( value.toString() ),
-				maxLobPrefetchSizeDefault
-		);
-
-		if ( this.nClobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize ) {
-			this.nClobTypeDescriptor = new HANANClobJdbcType( maxLobPrefetchSize );
-		}
-
-		if ( this.blobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize ) {
-			this.blobTypeDescriptor = new HANABlobType( maxLobPrefetchSize );
-		}
-
-		if ( supportsAsciiStringTypes() ) {
-			if ( this.clobTypeDescriptor.getMaxLobPrefetchSize() != maxLobPrefetchSize
-					|| this.clobTypeDescriptor.isUseUnicodeStringTypes() != this.useUnicodeStringTypes ) {
-				this.clobTypeDescriptor = new HANAClobJdbcType( maxLobPrefetchSize, this.useUnicodeStringTypes );
-			}
-		}
-
-		boolean treatDoubleTypedFieldsAsDecimal = configurationService.getSetting(TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_PARAMETER_NAME, StandardConverters.BOOLEAN,
-				TREAT_DOUBLE_TYPED_FIELDS_AS_DECIMAL_DEFAULT_VALUE);
-
-		final JdbcTypeRegistry jdbcTypeRegistry = typeContributions.getTypeConfiguration()
-				.getJdbcTypeRegistry();
+		final TypeConfiguration typeConfiguration = typeContributions.getTypeConfiguration();
+		final JdbcTypeRegistry jdbcTypeRegistry = typeConfiguration.getJdbcTypeRegistry();
 		if ( treatDoubleTypedFieldsAsDecimal ) {
-			typeContributions.getTypeConfiguration().getBasicTypeRegistry()
+			typeConfiguration.getBasicTypeRegistry()
 					.register(
-							new BasicTypeImpl<>(
-									DoubleJavaType.INSTANCE,
-									NumericJdbcType.INSTANCE
-							),
+							new BasicTypeImpl<>( DoubleJavaType.INSTANCE, NumericJdbcType.INSTANCE ),
 							Double.class.getName()
 					);
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.computeIfAbsent( Types.FLOAT, code -> new HashSet<>() )
-					.clear();
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.computeIfAbsent( Types.REAL, code -> new HashSet<>() )
-					.clear();
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.computeIfAbsent( Types.DOUBLE, code -> new HashSet<>() )
-					.clear();
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.get( Types.FLOAT )
-					.add( StandardBasicTypes.BIG_DECIMAL.getName() );
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.get( Types.REAL )
-					.add( StandardBasicTypes.BIG_DECIMAL.getName() );
-			typeContributions.getTypeConfiguration().getJdbcToHibernateTypeContributionMap()
-					.get( Types.DOUBLE )
-					.add( StandardBasicTypes.BIG_DECIMAL.getName() );
-			jdbcTypeRegistry.addDescriptor(
-					Types.FLOAT,
-					NumericJdbcType.INSTANCE
-			);
-			jdbcTypeRegistry.addDescriptor(
-					Types.REAL,
-					NumericJdbcType.INSTANCE
-			);
-			jdbcTypeRegistry.addDescriptor(
-					Types.DOUBLE,
-					NumericJdbcType.INSTANCE
-			);
+			final Map<Integer, Set<String>> jdbcToHibernateTypeContributionMap = typeConfiguration.getJdbcToHibernateTypeContributionMap();
+			jdbcToHibernateTypeContributionMap.computeIfAbsent( Types.FLOAT, code -> new HashSet<>() ).clear();
+			jdbcToHibernateTypeContributionMap.computeIfAbsent( Types.REAL, code -> new HashSet<>() ).clear();
+			jdbcToHibernateTypeContributionMap.computeIfAbsent( Types.DOUBLE, code -> new HashSet<>() ).clear();
+			jdbcToHibernateTypeContributionMap.get( Types.FLOAT ).add( StandardBasicTypes.BIG_DECIMAL.getName() );
+			jdbcToHibernateTypeContributionMap.get( Types.REAL ).add( StandardBasicTypes.BIG_DECIMAL.getName() );
+			jdbcToHibernateTypeContributionMap.get( Types.DOUBLE ).add( StandardBasicTypes.BIG_DECIMAL.getName() );
+			jdbcTypeRegistry.addDescriptor( Types.FLOAT, NumericJdbcType.INSTANCE );
+			jdbcTypeRegistry.addDescriptor( Types.REAL, NumericJdbcType.INSTANCE );
+			jdbcTypeRegistry.addDescriptor( Types.DOUBLE, NumericJdbcType.INSTANCE );
 		}
 
-		jdbcTypeRegistry.addDescriptor( Types.CLOB, this.clobTypeDescriptor );
-		jdbcTypeRegistry.addDescriptor( Types.NCLOB, this.nClobTypeDescriptor );
-		jdbcTypeRegistry.addDescriptor( Types.BLOB, this.blobTypeDescriptor );
+		jdbcTypeRegistry.addDescriptor( Types.CLOB, new HANAClobJdbcType( maxLobPrefetchSize, useUnicodeStringTypes ) );
+		jdbcTypeRegistry.addDescriptor( Types.NCLOB, new HANANClobJdbcType( maxLobPrefetchSize ) );
+		jdbcTypeRegistry.addDescriptor( Types.BLOB, new HANABlobType( maxLobPrefetchSize ) );
 		// tinyint is unsigned on HANA
 		jdbcTypeRegistry.addDescriptor( Types.TINYINT, TinyIntAsSmallIntJdbcType.INSTANCE );
 		if ( isUseUnicodeStringTypes() ) {
@@ -1047,10 +1037,6 @@ public abstract class AbstractHANADialect extends Dialect {
 		}
 	}
 
-	public JdbcType getBlobTypeDescriptor() {
-		return this.blobTypeDescriptor;
-	}
-
 	@Override
 	public void appendBooleanValueString(SqlAppender appender, boolean bool) {
 		if ( this.useLegacyBooleanType ) {
@@ -1266,12 +1252,16 @@ public abstract class AbstractHANADialect extends Dialect {
 	}
 
 	public boolean isUseUnicodeStringTypes() {
-		return this.useUnicodeStringTypes;
+		return this.useUnicodeStringTypes || isDefaultTableTypeColumn() && isCloud();
 	}
 
-	protected abstract boolean supportsAsciiStringTypes();
+	protected boolean supportsAsciiStringTypes() {
+		return !isDefaultTableTypeColumn() || !isCloud();
+	}
 
-	protected abstract Boolean useUnicodeStringTypesDefault();
+	protected Boolean useUnicodeStringTypesDefault() {
+		return isDefaultTableTypeColumn() ? isCloud() : Boolean.FALSE;
+	}
 
 	private static class CloseSuppressingReader extends FilterReader {
 
@@ -1756,6 +1746,7 @@ public abstract class AbstractHANADialect extends Dialect {
 	public static class HANABlobType implements JdbcType {
 
 		private static final long serialVersionUID = 5874441715643764323L;
+		public static final JdbcType INSTANCE = new HANABlobType( HANAServerConfiguration.MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
 
 		final int maxLobPrefetchSize;
 
@@ -1843,4 +1834,59 @@ public abstract class AbstractHANADialect extends Dialect {
 			return this.maxLobPrefetchSize;
 		}
 	}
+
+	@Override
+	public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
+			EntityMappingType entityDescriptor,
+			RuntimeModelCreationContext runtimeModelCreationContext) {
+		return new GlobalTemporaryTableMutationStrategy(
+				TemporaryTable.createIdTable(
+						entityDescriptor,
+						basename -> TemporaryTable.ID_TABLE_PREFIX + basename,
+						this,
+						runtimeModelCreationContext
+				),
+				runtimeModelCreationContext.getSessionFactory()
+		);
+	}
+
+	@Override
+	public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(
+			EntityMappingType entityDescriptor,
+			RuntimeModelCreationContext runtimeModelCreationContext) {
+		return new GlobalTemporaryTableInsertStrategy(
+				TemporaryTable.createEntityTable(
+						entityDescriptor,
+						name -> TemporaryTable.ENTITY_TABLE_PREFIX + name,
+						this,
+						runtimeModelCreationContext
+				),
+				runtimeModelCreationContext.getSessionFactory()
+		);
+	}
+
+	@Override
+	public TemporaryTableKind getSupportedTemporaryTableKind() {
+		return TemporaryTableKind.GLOBAL;
+	}
+
+	@Override
+	public String getTemporaryTableCreateOptions() {
+		return "on commit delete rows";
+	}
+
+	@Override
+	public String getTemporaryTableCreateCommand() {
+		return "create global temporary row table";
+	}
+
+	@Override
+	public String getTemporaryTableTruncateCommand() {
+		return "truncate table";
+	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/CockroachDialect.java

@@ -572,6 +572,11 @@ public class CockroachDialect extends Dialect {
 		return true;
 	}
 
+	@Override
+	public boolean supportsConflictClauseForInsertCTE() {
+		return true;
+	}
+
 	@Override
 	public String getNoColumnsInsertString() {
 		return "default values";
@@ -1160,4 +1165,14 @@ public class CockroachDialect extends Dialect {
 //			RuntimeModelCreationContext runtimeModelCreationContext) {
 //		return new CteInsertStrategy( rootEntityDescriptor, runtimeModelCreationContext );
 //	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/CockroachSqlAstTranslator.java

@@ -7,20 +7,27 @@
 package org.hibernate.dialect;
 
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteMaterialization;
-import org.hibernate.sql.ast.tree.cte.CteStatement;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.InArrayPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for Cockroach.
@@ -33,6 +40,56 @@ public class CockroachSqlAstTranslator<T extends JdbcOperation> extends Abstract
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void renderTableReferenceIdentificationVariable(TableReference tableReference) {
+		final String identificationVariable = tableReference.getIdentificationVariable();
+		if ( identificationVariable != null ) {
+			final Clause currentClause = getClauseStack().getCurrent();
+			if ( currentClause == Clause.INSERT ) {
+				// PostgreSQL requires the "as" keyword for inserts
+				appendSql( " as " );
+			}
+			else {
+				append( WHITESPACE );
+			}
+			append( tableReference.getIdentificationVariable() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		final Statement currentStatement = getStatementStack().getCurrent();
+		if ( !( currentStatement instanceof UpdateStatement )
+				|| !hasNonTrivialFromClause( ( (UpdateStatement) currentStatement ).getFromClause() ) ) {
+			// For UPDATE statements we render a full FROM clause and a join condition to match target table rows,
+			// but for that to work, we have to omit the alias for the target table reference here
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseJoiningDmlTargetReference( statement );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitStandardConflictClause( conflictClause );
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );

hibernate-core/src/main/java/org/hibernate/dialect/DB2Dialect.java

@@ -42,8 +42,11 @@ import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.mapping.Column;
 import org.hibernate.metamodel.mapping.EntityMappingType;
@@ -87,6 +90,7 @@ import org.hibernate.type.spi.TypeConfiguration;
 
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
 import static org.hibernate.type.SqlTypes.BINARY;
 import static org.hibernate.type.SqlTypes.BLOB;
 import static org.hibernate.type.SqlTypes.BOOLEAN;
@@ -973,6 +977,20 @@ public class DB2Dialect extends Dialect {
 		appender.appendSql( '\'' );
 	}
 
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor(
+				sqle -> {
+					switch ( JdbcExceptionHelper.extractErrorCode( sqle ) ) {
+						case -803:
+							return extractUsingTemplate( "SQLERRMC=1;", ",", sqle.getMessage() );
+						default:
+							return null;
+					}
+				}
+		);
+	}
+
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
@@ -980,6 +998,14 @@ public class DB2Dialect extends Dialect {
 			switch ( errorCode ) {
 				case -952:
 					return new LockTimeoutException( message, sqlException, sql );
+				case -803:
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+					);
 			}
 			return null;
 		};
@@ -1171,4 +1197,14 @@ public class DB2Dialect extends Dialect {
 	public int rowIdSqlType() {
 		return VARBINARY;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return getDB2Version().isSameOrAfter( 11 );
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/DB2SqlAstTranslator.java

@@ -12,8 +12,10 @@ import java.util.function.Consumer;
 import org.hibernate.LockMode;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
@@ -27,10 +29,12 @@ import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.TableReferenceJoin;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
@@ -347,12 +351,40 @@ public class DB2SqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAst
 	@Override
 	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
 		final boolean closeWrapper = renderReturningClause( statement );
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
 			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
 		if ( closeWrapper ) {
 			appendSql( ')' );
 		}
 	}
 
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseExcludingDmlTargetReference( statement );
+	}
+
 	protected boolean renderReturningClause(MutationStatement statement) {
 		final List<ColumnReference> returningColumns = statement.getReturningColumns();
 		if ( isEmpty( returningColumns ) ) {
@@ -521,13 +553,13 @@ public class DB2SqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAst
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from sysibm.dual";
+	protected String getDual() {
+		return "sysibm.dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/Database.java

@@ -135,7 +135,7 @@ public enum Database {
 	HANA {
 		@Override
 		public Dialect createDialect(DialectResolutionInfo info) {
-			return new HANAColumnStoreDialect( info );
+			return new HANADialect( info );
 		}
 		@Override
 		public boolean productNameMatches(String databaseName) {

hibernate-core/src/main/java/org/hibernate/dialect/DerbyDialect.java

@@ -35,8 +35,11 @@ import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.metamodel.mapping.EntityMappingType;
 import org.hibernate.metamodel.spi.RuntimeModelCreationContext;
@@ -690,14 +693,42 @@ public class DerbyDialect extends Dialect {
 		return 512;
 	}
 
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor( sqle -> {
+			final String sqlState = JdbcExceptionHelper.extractSqlState( sqle );
+			if ( sqlState != null ) {
+				switch ( sqlState ) {
+					case "23505":
+						return TemplatedViolatedConstraintNameExtractor.extractUsingTemplate(
+								"'", "'",
+								sqle.getMessage()
+						);
+				}
+			}
+			return null;
+		} );
+	}
+
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
 			final String sqlState = JdbcExceptionHelper.extractSqlState( sqlException );
 //				final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
 
 			if ( sqlState != null ) {
 				switch ( sqlState ) {
+					case "23505":
+						// Unique constraint violation
+						constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+						return new ConstraintViolationException(
+								message,
+								sqlException,
+								sql,
+								ConstraintViolationException.ConstraintKind.UNIQUE,
+								constraintName
+						);
 					case "40XL1":
 					case "40XL2":
 						return new LockTimeoutException( message, sqlException, sql );
@@ -1013,4 +1044,5 @@ public class DerbyDialect extends Dialect {
 	public UniqueDelegate getUniqueDelegate() {
 		return uniqueDelegate;
 	}
+
 }

hibernate-core/src/main/java/org/hibernate/dialect/DerbySqlAstTranslator.java

@@ -233,13 +233,13 @@ public class DerbySqlAstTranslator<T extends JdbcOperation> extends AbstractSqlA
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from (values 0) dual";
+	protected String getDual() {
+		return "(values 0)";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual() + " dual";
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/Dialect.java

@@ -4359,6 +4359,17 @@ public abstract class Dialect implements ConversionContext, TypeContributor, Fun
 		return false;
 	}
 
+	/**
+	 * Does this dialect support the {@code conflict} clause for insert statements
+	 * that appear in a CTE?
+	 *
+	 * @return {@code true} if {@code conflict} clause is supported
+	 * @since 6.5
+	 */
+	public boolean supportsConflictClauseForInsertCTE() {
+		return false;
+	}
+
 	/**
 	 * Does this dialect support {@code values} lists of form
 	 * {@code VALUES (1), (2), (3)}?
@@ -4380,6 +4391,16 @@ public abstract class Dialect implements ConversionContext, TypeContributor, Fun
 		return true;
 	}
 
+	/**
+	 * Does this dialect support the {@code from} clause for update statements?
+	 *
+	 * @return {@code true} if {@code from} clause is supported
+	 * @since 6.5
+	 */
+	public boolean supportsFromClauseInUpdate() {
+		return false;
+	}
+
 	/**
 	 * Does this dialect support {@code SKIP_LOCKED} timeout.
 	 *

hibernate-core/src/main/java/org/hibernate/dialect/H2Dialect.java

@@ -721,8 +721,19 @@ public class H2Dialect extends Dialect {
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
 			final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
 
 			switch (errorCode) {
+				case 23505:
+					// Unique constraint violation
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
 				case 40001:
 					// DEADLOCK DETECTED
 					return new LockAcquisitionException(message, sqlException, sql);
@@ -731,7 +742,7 @@ public class H2Dialect extends Dialect {
 					return new PessimisticLockException(message, sqlException, sql);
 				case 90006:
 					// NULL not allowed for column [90006-145]
-					final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
 					return new ConstraintViolationException(message, sqlException, sql, constraintName);
 				case 57014:
 					return new QueryTimeoutException( message, sqlException, sql );
@@ -935,4 +946,9 @@ public class H2Dialect extends Dialect {
 			return "?" + position;
 		}
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/H2SqlAstTranslator.java

@@ -11,7 +11,9 @@ import java.util.List;
 import org.hibernate.LockMode;
 import org.hibernate.dialect.identity.H2IdentityColumnSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.SqlSelection;
 import org.hibernate.sql.ast.tree.Statement;
@@ -23,13 +25,17 @@ import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.SelectClause;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.model.internal.TableInsertStandard;
 
@@ -80,6 +86,44 @@ public class H2SqlAstTranslator<T extends JdbcOperation> extends SqlAstTranslato
 		);
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateMerge( statement );
+		}
+		else {
+			super.visitUpdateStatementOnly( statement );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected void visitReturningColumns(List<ColumnReference> returningColumns) {
 		// do nothing - this is handled via `#visitReturningInsertStatement`
@@ -267,11 +311,10 @@ public class H2SqlAstTranslator<T extends JdbcOperation> extends SqlAstTranslato
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
-
 	private boolean supportsOffsetFetchClause() {
 		return true;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/HANACloudColumnStoreDialect.java

@@ -19,35 +19,14 @@ package org.hibernate.dialect;
  * 
  * @author Jonathan Bregler
  *
- * @deprecated use HANAColumnStoreDialect(400)
+ * @deprecated use {@link HANADialect} with {@code DatabaseVersion.make( 4 )} instead
  */
-@Deprecated
+@Deprecated(forRemoval = true)
 public class HANACloudColumnStoreDialect extends HANAColumnStoreDialect {
 
 	public HANACloudColumnStoreDialect() {
 		// No idea how the versioning scheme is here, but since this is deprecated anyway, keep it as is
-		super( DatabaseVersion.make( 4 ) );
-	}
-
-	@Override
-	public boolean supportsLateral() {
-		// Couldn't find a reference since when this is supported
-		return true;
-	}
-
-	@Override
-	protected boolean supportsAsciiStringTypes() {
-		return getVersion().isBefore( 4 );
-	}
-
-	@Override
-	protected Boolean useUnicodeStringTypesDefault() {
-		return getVersion().isSameOrAfter( 4 );
-	}
-
-	@Override
-	public boolean isUseUnicodeStringTypes() {
-		return getVersion().isSameOrAfter( 4 ) || super.isUseUnicodeStringTypes();
+		super( new HANAServerConfiguration( DatabaseVersion.make( 4 ) ) );
 	}
 
 }

hibernate-core/src/main/java/org/hibernate/dialect/HANAColumnStoreDialect.java

@@ -34,11 +34,14 @@ import static org.hibernate.query.sqm.produce.function.FunctionParameterType.ANY
  * 
  * @author Andrew Clemons
  * @author Jonathan Bregler
+ *
+ * @deprecated use {@link HANADialect} instead
  */
+@Deprecated(forRemoval = true)
 public class HANAColumnStoreDialect extends AbstractHANADialect {
 
 	public HANAColumnStoreDialect(DialectResolutionInfo info) {
-		this( AbstractHANADialect.createVersion( info ) );
+		this( HANAServerConfiguration.fromDialectResolutionInfo( info ) );
 		registerKeywords( info );
 	}
 	
@@ -48,129 +51,10 @@ public class HANAColumnStoreDialect extends AbstractHANADialect {
 	}
 
 	public HANAColumnStoreDialect(DatabaseVersion version) {
-		super( version );
+		this( new HANAServerConfiguration( version ) );
 	}
 
-	@Override
-	public boolean isUseUnicodeStringTypes() {
-		return getVersion().isSameOrAfter( 4 ) || super.isUseUnicodeStringTypes();
-	}
-
-	@Override
-	public int getMaxVarcharLength() {
-		return 5000;
-	}
-
-	@Override
-	protected void registerDefaultKeywords() {
-		super.registerDefaultKeywords();
-		registerKeyword( "array" );
-		registerKeyword( "at" );
-		registerKeyword( "authorization" );
-		registerKeyword( "between" );
-		registerKeyword( "by" );
-		registerKeyword( "collate" );
-		registerKeyword( "empty" );
-		registerKeyword( "filter" );
-		registerKeyword( "grouping" );
-		registerKeyword( "no" );
-		registerKeyword( "not" );
-		registerKeyword( "of" );
-		registerKeyword( "over" );
-		registerKeyword( "recursive" );
-		registerKeyword( "row" );
-		registerKeyword( "table" );
-		registerKeyword( "to" );
-		registerKeyword( "window" );
-		registerKeyword( "within" );
-	}
-
-
-	@Override
-	public void initializeFunctionRegistry(FunctionContributions functionContributions) {
-		super.initializeFunctionRegistry(functionContributions);
-		final TypeConfiguration typeConfiguration = functionContributions.getTypeConfiguration();
-
-		// full-text search functions
-		functionContributions.getFunctionRegistry().registerNamed(
-				"score",
-				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE )
-		);
-		functionContributions.getFunctionRegistry().registerNamed( "snippets" );
-		functionContributions.getFunctionRegistry().registerNamed( "highlighted" );
-		functionContributions.getFunctionRegistry().registerBinaryTernaryPattern(
-				"contains",
-				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN ),
-				"contains(?1,?2)",
-				"contains(?1,?2,?3)",
-				ANY, ANY, ANY,
-				typeConfiguration
-		);
-	}
-
-	@Override
-	public String getCreateTableString() {
-		return "create column table";
-	}
-
-	@Override
-	public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
-			EntityMappingType entityDescriptor,
-			RuntimeModelCreationContext runtimeModelCreationContext) {
-		return new GlobalTemporaryTableMutationStrategy(
-				TemporaryTable.createIdTable(
-						entityDescriptor,
-						basename -> TemporaryTable.ID_TABLE_PREFIX + basename,
-						this,
-						runtimeModelCreationContext
-				),
-				runtimeModelCreationContext.getSessionFactory()
-		);
-	}
-
-	@Override
-	public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(
-			EntityMappingType entityDescriptor,
-			RuntimeModelCreationContext runtimeModelCreationContext) {
-		return new GlobalTemporaryTableInsertStrategy(
-				TemporaryTable.createEntityTable(
-						entityDescriptor,
-						name -> TemporaryTable.ENTITY_TABLE_PREFIX + name,
-						this,
-						runtimeModelCreationContext
-				),
-				runtimeModelCreationContext.getSessionFactory()
-		);
-	}
-
-	@Override
-	public TemporaryTableKind getSupportedTemporaryTableKind() {
-		return TemporaryTableKind.GLOBAL;
-	}
-
-	@Override
-	public String getTemporaryTableCreateOptions() {
-		return "on commit delete rows";
-	}
-
-	@Override
-	public String getTemporaryTableCreateCommand() {
-		// We use a row table for temporary tables here because HANA doesn't support UPDATE on temporary column tables
-		return "create global temporary row table";
-	}
-
-	@Override
-	public String getTemporaryTableTruncateCommand() {
-		return "truncate table";
-	}
-
-	@Override
-	protected boolean supportsAsciiStringTypes() {
-		return true;
-	}
-
-	@Override
-	protected Boolean useUnicodeStringTypesDefault() {
-		return true;
+	public HANAColumnStoreDialect(HANAServerConfiguration configuration) {
+		super( configuration, true );
 	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/HANADialect.java

@@ -0,0 +1,55 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.dialect;
+
+import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
+
+/**
+ * An SQL dialect for the SAP HANA Platform and Cloud.
+ * <p>
+ * For more information on SAP HANA Cloud, refer to the
+ * <a href="https://help.sap.com/docs/hana-cloud-database/sap-hana-cloud-sap-hana-database-sql-reference-guide/sap-hana-cloud-sap-hana-database-sql-reference-guide">SAP HANA Cloud SQL Reference Guide</a>.
+ * For more information on SAP HANA Platform, refer to the
+ * <a href="https://help.sap.com/docs/SAP_HANA_PLATFORM/4fe29514fd584807ac9f2a04f6754767/b4b0eec1968f41a099c828a4a6c8ca0f.html?locale=en-US">SAP HANA Platform SQL Reference Guide</a>.
+ * <p>
+ * Column tables are created by this dialect by default when using the auto-ddl feature.
+ *
+ * @author Andrew Clemons
+ * @author Jonathan Bregler
+ */
+@SuppressWarnings("removal")
+public class HANADialect extends AbstractHANADialect {
+
+	private static final DatabaseVersion MINIMUM_VERSION = DatabaseVersion.make( 1, 0, 120 );
+
+	public HANADialect(DialectResolutionInfo info) {
+		this( HANAServerConfiguration.fromDialectResolutionInfo( info ), true );
+		registerKeywords( info );
+	}
+
+	public HANADialect() {
+		// SAP HANA 1.0 SPS12 R0 is the default
+		this( MINIMUM_VERSION );
+	}
+
+	public HANADialect(DatabaseVersion version) {
+		this( new HANAServerConfiguration( version ), true );
+	}
+
+	public HANADialect(DatabaseVersion version, boolean defaultTableTypeColumn) {
+		this( new HANAServerConfiguration( version ), defaultTableTypeColumn );
+	}
+
+	public HANADialect(HANAServerConfiguration configuration, boolean defaultTableTypeColumn) {
+		super( configuration, defaultTableTypeColumn );
+	}
+
+	@Override
+	protected DatabaseVersion getMinimumSupportedVersion() {
+		return MINIMUM_VERSION;
+	}
+}

hibernate-core/src/main/java/org/hibernate/dialect/HANARowStoreDialect.java

@@ -29,11 +29,14 @@ import org.hibernate.query.sqm.mutation.spi.SqmMultiTableMutationStrategy;
  *
  * @author Andrew Clemons
  * @author Jonathan Bregler
+ *
+ * @deprecated use {@link HANADialect} instead
  */
+@Deprecated(forRemoval = true)
 public class HANARowStoreDialect extends AbstractHANADialect {
 
 	public HANARowStoreDialect(DialectResolutionInfo info) {
-		this( AbstractHANADialect.createVersion( info ) );
+		this( HANAServerConfiguration.fromDialectResolutionInfo( info ) );
 		registerKeywords( info );
 	}
 
@@ -43,71 +46,10 @@ public class HANARowStoreDialect extends AbstractHANADialect {
 	}
 
 	public HANARowStoreDialect(DatabaseVersion version) {
-		super( version );
+		this( new HANAServerConfiguration( version ) );
 	}
 
-	@Override
-	public String getCreateTableString() {
-		return "create row table";
-	}
-
-	@Override
-	public SqmMultiTableMutationStrategy getFallbackSqmMutationStrategy(
-			EntityMappingType entityDescriptor,
-			RuntimeModelCreationContext runtimeModelCreationContext) {
-		return new GlobalTemporaryTableMutationStrategy(
-				TemporaryTable.createIdTable(
-						entityDescriptor,
-						basename -> TemporaryTable.ID_TABLE_PREFIX + basename,
-						this,
-						runtimeModelCreationContext
-				),
-				runtimeModelCreationContext.getSessionFactory()
-		);
-	}
-
-	@Override
-	public SqmMultiTableInsertStrategy getFallbackSqmInsertStrategy(
-			EntityMappingType entityDescriptor,
-			RuntimeModelCreationContext runtimeModelCreationContext) {
-		return new GlobalTemporaryTableInsertStrategy(
-				TemporaryTable.createEntityTable(
-						entityDescriptor,
-						name -> TemporaryTable.ENTITY_TABLE_PREFIX + name,
-						this,
-						runtimeModelCreationContext
-				),
-				runtimeModelCreationContext.getSessionFactory()
-		);
-	}
-
-	@Override
-	public TemporaryTableKind getSupportedTemporaryTableKind() {
-		return TemporaryTableKind.GLOBAL;
-	}
-
-	@Override
-	public String getTemporaryTableCreateOptions() {
-		return "on commit delete rows";
-	}
-
-	@Override
-	public String getTemporaryTableCreateCommand() {
-		return "create global temporary row table";
-	}
-
-	@Override
-	public String getTemporaryTableTruncateCommand() {
-		return "truncate table";
-	}
-
-	@Override
-	protected boolean supportsAsciiStringTypes() {
-		return true;
-	}
-
-	@Override
-	protected Boolean useUnicodeStringTypesDefault() {
-		return Boolean.FALSE;
+	public HANARowStoreDialect(HANAServerConfiguration configuration) {
+		super( configuration, false );
 	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/HANAServerConfiguration.java

@@ -0,0 +1,99 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.dialect;
+
+import java.sql.DatabaseMetaData;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import org.hibernate.engine.jdbc.dialect.spi.DialectResolutionInfo;
+import org.hibernate.internal.CoreLogging;
+import org.hibernate.internal.CoreMessageLogger;
+import org.hibernate.internal.util.config.ConfigurationHelper;
+
+import static org.hibernate.cfg.DialectSpecificSettings.HANA_MAX_LOB_PREFETCH_SIZE;
+
+/**
+ * Utility class that extract some initial configuration from the database for {@link HANADialect}.
+ */
+public class HANAServerConfiguration {
+
+	private static final CoreMessageLogger LOG = CoreLogging.messageLogger( HANAServerConfiguration.class );
+	public static final int MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE = 1024;
+
+	private final DatabaseVersion fullVersion;
+	private final int maxLobPrefetchSize;
+
+	public HANAServerConfiguration(DatabaseVersion fullVersion) {
+		this( fullVersion, MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE );
+	}
+
+	public HANAServerConfiguration(DatabaseVersion fullVersion, int maxLobPrefetchSize) {
+		this.fullVersion = fullVersion;
+		this.maxLobPrefetchSize = maxLobPrefetchSize;
+	}
+
+	public DatabaseVersion getFullVersion() {
+		return fullVersion;
+	}
+
+	public int getMaxLobPrefetchSize() {
+		return maxLobPrefetchSize;
+	}
+
+	public static HANAServerConfiguration fromDialectResolutionInfo(DialectResolutionInfo info) {
+		Integer maxLobPrefetchSize = null;
+		final DatabaseMetaData databaseMetaData = info.getDatabaseMetadata();
+		if ( databaseMetaData != null ) {
+			try (final Statement statement = databaseMetaData.getConnection().createStatement()) {
+				try ( ResultSet rs = statement.executeQuery(
+						"SELECT TOP 1 VALUE,MAP(LAYER_NAME,'DEFAULT',1,'SYSTEM',2,'DATABASE',3,4) AS LAYER FROM SYS.M_INIFILE_CONTENTS WHERE FILE_NAME='indexserver.ini' AND SECTION='session' AND KEY='max_lob_prefetch_size' ORDER BY LAYER DESC" ) ) {
+					// This only works if the current user has the privilege INIFILE ADMIN
+					if ( rs.next() ) {
+						maxLobPrefetchSize = rs.getInt( 1 );
+					}
+				}
+			}
+			catch (SQLException e) {
+				// Ignore
+				LOG.debug(
+						"An error occurred while trying to determine the value of the HANA parameter indexserver.ini / session / max_lob_prefetch_size.",
+						e );
+			}
+		}
+		// default to the dialect-specific configuration settings
+		if ( maxLobPrefetchSize == null ) {
+			maxLobPrefetchSize = ConfigurationHelper.getInt(
+					HANA_MAX_LOB_PREFETCH_SIZE,
+					info.getConfigurationValues(),
+					MAX_LOB_PREFETCH_SIZE_DEFAULT_VALUE
+			);
+		}
+		return new HANAServerConfiguration( createVersion( info ), maxLobPrefetchSize );
+	}
+
+	private static DatabaseVersion createVersion(DialectResolutionInfo info) {
+		// Parse the version according to https://answers.sap.com/questions/9760991/hana-sps-version-check.html
+		final String versionString = info.getDatabaseVersion();
+		int majorVersion = 1;
+		int minorVersion = 0;
+		int patchLevel = 0;
+		final String[] components = versionString.split( "\\." );
+		if ( components.length >= 3 ) {
+			try {
+				majorVersion = Integer.parseInt( components[0] );
+				minorVersion = Integer.parseInt( components[1] );
+				patchLevel = Integer.parseInt( components[2] );
+			}
+			catch (NumberFormatException ex) {
+				// Ignore
+			}
+		}
+		return DatabaseVersion.make( majorVersion, minorVersion, patchLevel );
+	}
+}

hibernate-core/src/main/java/org/hibernate/dialect/HANASqlAstTranslator.java

@@ -8,24 +8,34 @@ package org.hibernate.dialect;
 
 import java.util.List;
 
+import org.hibernate.LockMode;
 import org.hibernate.MappingException;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.BinaryArithmeticOperator;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteStatement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
 import org.hibernate.sql.ast.tree.from.FunctionTableReference;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
+import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.model.internal.TableInsertStandard;
 
@@ -42,6 +52,83 @@ public class HANASqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 		super( sessionFactory, statement );
 	}
 
+	@SuppressWarnings("removal")
+	private boolean isHanaCloud() {
+		return ( (AbstractHANADialect) getDialect() ).isCloud();
+	}
+
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		// HANA Cloud does not support the FROM clause in UPDATE statements
+		if ( isHanaCloud() && hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateMerge( statement );
+		}
+		else {
+			super.visitUpdateStatementOnly( statement );
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		// HANA Cloud does not support the FROM clause in UPDATE statements
+		if ( isHanaCloud() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update" );
+			final Stack<Clause> clauseStack = getClauseStack();
+			try {
+				clauseStack.push( Clause.UPDATE );
+				renderTableReferenceIdentificationVariable( updateStatement.getTargetTable() );
+			}
+			finally {
+				clauseStack.pop();
+			}
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		// HANA Cloud does not support the FROM clause in UPDATE statements
+		if ( !isHanaCloud() ) {
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	protected boolean shouldEmulateFetchClause(QueryPart queryPart) {
 		// HANA only supports the LIMIT + OFFSET syntax but also window functions
 		// Check if current query part is already row numbering to avoid infinite recursion
@@ -141,13 +228,13 @@ public class HANASqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from sys.dummy";
+	protected String getDual() {
+		return "sys.dummy";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	@Override
@@ -165,4 +252,9 @@ public class HANASqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 	protected void visitValuesList(List<Values> valuesList) {
 		visitValuesListEmulateSelectUnion( valuesList );
 	}
+
+	@Override
+	public void visitValuesTableReference(ValuesTableReference tableReference) {
+		emulateValuesTableReferenceColumnAliasing( tableReference );
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/HSQLDialect.java

@@ -27,6 +27,8 @@ import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
 import org.hibernate.engine.jdbc.env.spi.IdentifierHelperBuilder;
 import org.hibernate.engine.jdbc.env.spi.NameQualifierSupport;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.exception.ConstraintViolationException;
+import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
 import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
 import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
@@ -423,6 +425,29 @@ public class HSQLDialect extends Dialect {
 				return null;
 			} );
 
+	@Override
+	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
+		return (sqlException, message, sql) -> {
+			final int errorCode = JdbcExceptionHelper.extractErrorCode( sqlException );
+			final String constraintName;
+
+			switch ( errorCode ) {
+				case -104:
+					// Unique constraint violation
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName(sqlException);
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
+			}
+
+			return null;
+		};
+	}
+
 	@Override
 	public String getSelectClauseNullString(int sqlType, TypeConfiguration typeConfiguration) {
 		switch ( sqlType ) {
@@ -683,4 +708,9 @@ public class HSQLDialect extends Dialect {
 	public String quoteCollation(String collation) {
 		return '\"' + collation + '\"';
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/HSQLSqlAstTranslator.java

@@ -11,22 +11,30 @@ import java.util.function.Consumer;
 
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.BinaryArithmeticOperator;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.InArrayPredicate;
 import org.hibernate.sql.ast.tree.select.QueryPart;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.type.descriptor.jdbc.ArrayJdbcType;
 
@@ -41,6 +49,44 @@ public class HSQLSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateMerge( statement );
+		}
+		else {
+			super.visitUpdateStatementOnly( statement );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -283,14 +329,9 @@ public class HSQLSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 		return false;
 	}
 
-	@Override
-	protected String getFromDual() {
-		return " from (values(0))";
-	}
-
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getFromDual();
+		return " from " + getDual();
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-core/src/main/java/org/hibernate/dialect/MariaDBSqlAstTranslator.java

@@ -6,21 +6,36 @@
  */
 package org.hibernate.dialect;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.CastTarget;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.select.SelectStatement;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for MariaDB.
@@ -36,6 +51,135 @@ public class MariaDBSqlAstTranslator<T extends JdbcOperation> extends AbstractSq
 		this.dialect = (MariaDBDialect) DialectDelegateWrapper.extractRealDialect( super.getDialect() );
 	}
 
+	@Override
+	protected void visitInsertSource(InsertSelectStatement statement) {
+		if ( statement.getSourceSelectStatement() != null ) {
+			if ( statement.getConflictClause() != null ) {
+				final List<ColumnReference> targetColumnReferences = statement.getTargetColumns();
+				final List<String> columnNames = new ArrayList<>( targetColumnReferences.size() );
+				for ( ColumnReference targetColumnReference : targetColumnReferences ) {
+					columnNames.add( targetColumnReference.getColumnExpression() );
+				}
+				appendSql( "select * from " );
+				emulateQueryPartTableReferenceColumnAliasing(
+						new QueryPartTableReference(
+								new SelectStatement( statement.getSourceSelectStatement() ),
+								"excluded",
+								columnNames,
+								false,
+								getSessionFactory()
+						)
+				);
+			}
+			else {
+				statement.getSourceSelectStatement().accept( this );
+			}
+		}
+		else {
+			visitValuesList( statement.getValuesList() );
+		}
+	}
+
+	@Override
+	public void visitColumnReference(ColumnReference columnReference) {
+		final Statement currentStatement;
+		if ( "excluded".equals( columnReference.getQualifier() )
+				&& ( currentStatement = getStatementStack().getCurrent() ) instanceof InsertSelectStatement
+				&& ( (InsertSelectStatement) currentStatement ).getSourceSelectStatement() == null ) {
+			// Accessing the excluded row for an insert-values statement in the conflict clause requires the values qualifier
+			appendSql( "values(" );
+			columnReference.appendReadExpression( this, null );
+			append( ')' );
+		}
+		else {
+			super.visitColumnReference( columnReference );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		if ( updateStatement.getFromClause().getRoots().isEmpty() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update " );
+			renderFromClauseSpaces( updateStatement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitOnDuplicateKeyConflictClause( conflictClause );
+	}
+
+	@Override
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		// Since MariaDB does not support aliasing the insert target table,
+		// we must detect column reference that are used in the conflict clause
+		// and use the table expression as qualifier instead
+		if ( getClauseStack().getCurrent() != Clause.SET
+				|| !( ( currentDmlStatement = getCurrentDmlStatement() ) instanceof InsertSelectStatement )
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
+		// Qualify the column reference with the table expression also when in subqueries
+		else if ( qualifierSupport != DmlTargetColumnQualifierSupport.NONE || !getQueryPartStack().isEmpty() ) {
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
+		}
+		else {
+			return null;
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClauseInSubquery() {
 		return false;
@@ -216,8 +360,8 @@ public class MariaDBSqlAstTranslator<T extends JdbcOperation> extends AbstractSq
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/MySQLDialect.java

@@ -1513,4 +1513,14 @@ public class MySQLDialect extends Dialect {
 	public String getEnableConstraintsStatement() {
 		return "set foreign_key_checks = 1";
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/MySQLSqlAstTranslator.java

@@ -6,25 +6,39 @@
  */
 package org.hibernate.dialect;
 
+import java.util.ArrayList;
+import java.util.List;
 import java.util.Locale;
 
 import org.hibernate.engine.jdbc.Size;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.CastTarget;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.select.SelectStatement;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for MySQL.
@@ -87,6 +101,146 @@ public class MySQLSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlA
 		return sqlType;
 	}
 
+	@Override
+	protected void visitInsertSource(InsertSelectStatement statement) {
+		if ( statement.getSourceSelectStatement() != null ) {
+			if ( statement.getConflictClause() != null ) {
+				final List<ColumnReference> targetColumnReferences = statement.getTargetColumns();
+				final List<String> columnNames = new ArrayList<>( targetColumnReferences.size() );
+				for ( ColumnReference targetColumnReference : targetColumnReferences ) {
+					columnNames.add( targetColumnReference.getColumnExpression() );
+				}
+				appendSql( "select * from " );
+				emulateQueryPartTableReferenceColumnAliasing(
+						new QueryPartTableReference(
+								new SelectStatement( statement.getSourceSelectStatement() ),
+								"excluded",
+								columnNames,
+								false,
+								getSessionFactory()
+						)
+				);
+			}
+			else {
+				statement.getSourceSelectStatement().accept( this );
+			}
+		}
+		else {
+			visitValuesList( statement.getValuesList() );
+			if ( statement.getConflictClause() != null && getDialect().getMySQLVersion().isSameOrAfter( 8, 0, 19 ) ) {
+				appendSql( " as excluded" );
+				char separator = '(';
+				for ( ColumnReference targetColumn : statement.getTargetColumns() ) {
+					appendSql( separator );
+					appendSql( targetColumn.getColumnExpression() );
+					separator = ',';
+				}
+				appendSql( ')' );
+			}
+		}
+	}
+
+	@Override
+	public void visitColumnReference(ColumnReference columnReference) {
+		final Statement currentStatement;
+		if ( getDialect().getMySQLVersion().isBefore( 8, 0, 19 )
+				&& "excluded".equals( columnReference.getQualifier() )
+				&& ( currentStatement = getStatementStack().getCurrent() ) instanceof InsertSelectStatement
+				&& ( (InsertSelectStatement) currentStatement ).getSourceSelectStatement() == null ) {
+			// Accessing the excluded row for an insert-values statement in the conflict clause requires the values qualifier
+			appendSql( "values(" );
+			columnReference.appendReadExpression( this, null );
+			append( ')' );
+		}
+		else {
+			super.visitColumnReference( columnReference );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		if ( updateStatement.getFromClause().getRoots().isEmpty() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update " );
+			renderFromClauseSpaces( updateStatement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitOnDuplicateKeyConflictClause( conflictClause );
+	}
+
+	@Override
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		// Since MySQL does not support aliasing the insert target table,
+		// we must detect column reference that are used in the conflict clause
+		// and use the table expression as qualifier instead
+		if ( getClauseStack().getCurrent() != Clause.SET
+				|| !( ( currentDmlStatement = getCurrentDmlStatement() ) instanceof InsertSelectStatement )
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
+		// Qualify the column reference with the table expression also when in subqueries
+		else if ( qualifierSupport != DmlTargetColumnQualifierSupport.NONE || !getQueryPartStack().isEmpty() ) {
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
+		}
+		else {
+			return null;
+		}
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -275,8 +429,8 @@ public class MySQLSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlA
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/OracleDialect.java

@@ -1048,6 +1048,7 @@ public class OracleDialect extends Dialect {
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
+			final String constraintName;
 			// interpreting Oracle exceptions is much much more precise based on their specific vendor codes.
 			switch ( JdbcExceptionHelper.extractErrorCode( sqlException ) ) {
 
@@ -1080,9 +1081,19 @@ public class OracleDialect extends Dialect {
 
 				// data integrity violation ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+				case 1:
+					// ORA-00001: unique constraint violated
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							constraintName
+					);
 				case 1407:
 					// ORA-01407: cannot update column to NULL
-					final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
+					constraintName = getViolatedConstraintNameExtractor().extractConstraintName( sqlException );
 					return new ConstraintViolationException( message, sqlException, sql, constraintName );
 
 				default:
@@ -1564,4 +1575,9 @@ public class OracleDialect extends Dialect {
 	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
 		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
 	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/OracleSqlAstTranslator.java

@@ -33,25 +33,28 @@ import org.hibernate.sql.ast.tree.expression.SqlTupleContainer;
 import org.hibernate.sql.ast.tree.expression.Summarization;
 import org.hibernate.sql.ast.tree.from.FromClause;
 import org.hibernate.sql.ast.tree.from.FunctionTableReference;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.UnionTableGroup;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.predicate.InSubQueryPredicate;
+import org.hibernate.sql.ast.tree.predicate.Predicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
 import org.hibernate.sql.ast.tree.select.SortSpecification;
 import org.hibernate.sql.ast.tree.update.Assignment;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.model.ast.ColumnValueBinding;
 import org.hibernate.sql.model.internal.OptionalTableUpdate;
 import org.hibernate.sql.results.internal.SqlSelectionImpl;
 import org.hibernate.type.SqlTypes;
-import org.hibernate.type.descriptor.jdbc.ArrayJdbcType;
 import org.hibernate.type.descriptor.jdbc.JdbcType;
 
 /**
@@ -65,6 +68,54 @@ public class OracleSqlAstTranslator<T extends JdbcOperation> extends SqlAstTrans
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void visitUpdateStatementOnly(UpdateStatement statement) {
+		if ( hasNonTrivialFromClause( statement.getFromClause() ) ) {
+			visitUpdateStatementEmulateInlineView( statement );
+		}
+		else {
+			renderUpdateClause( statement );
+			renderSetClause( statement.getAssignments() );
+			visitWhereClause( statement.getRestriction() );
+			visitReturningColumns( statement.getReturningColumns() );
+		}
+	}
+
+	@Override
+	protected void renderMergeUpdateClause(List<Assignment> assignments, Predicate wherePredicate) {
+		appendSql( " then update" );
+		renderSetClause( assignments );
+		visitWhereClause( wherePredicate );
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean needsRecursiveKeywordInWithClause() {
 		return false;
@@ -171,8 +222,15 @@ public class OracleSqlAstTranslator<T extends JdbcOperation> extends SqlAstTrans
 
 	@Override
 	protected void visitValuesList(List<Values> valuesList) {
+		if ( valuesList.size() < 2 ) {
+			visitValuesListStandard( valuesList );
+		}
+		else {
+			// Oracle doesn't support a multi-values insert
+			// So we render a select union emulation instead
 			visitValuesListEmulateSelectUnion( valuesList );
 		}
+	}
 
 	@Override
 	public void visitValuesTableReference(ValuesTableReference tableReference) {
@@ -555,13 +613,13 @@ public class OracleSqlAstTranslator<T extends JdbcOperation> extends SqlAstTrans
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override
 	protected String getFromDualForSelectOnly() {
-		return getDialect().getVersion().isSameOrAfter( 23 ) ? super.getFromDualForSelectOnly() : getFromDual();
+		return getDialect().getVersion().isSameOrAfter( 23 ) ? "" : ( " from " + getDual() );
 	}
 
 	private boolean supportsOffsetFetchClause() {

hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLDialect.java

@@ -787,6 +787,10 @@ public class PostgreSQLDialect extends Dialect {
 	public boolean supportsNonQueryWithCTE() {
 		return true;
 	}
+	@Override
+	public boolean supportsConflictClauseForInsertCTE() {
+		return true;
+	}
 
 	@Override
 	public SequenceSupport getSequenceSupport() {
@@ -1547,4 +1551,14 @@ public class PostgreSQLDialect extends Dialect {
 		// The maximum scale for `interval second` is 6 unfortunately
 		return 6;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/PostgreSQLSqlAstTranslator.java

@@ -10,6 +10,7 @@ import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.tree.Statement;
 import org.hibernate.sql.ast.tree.cte.CteMaterialization;
 import org.hibernate.sql.ast.tree.cte.CteStatement;
@@ -17,6 +18,10 @@ import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.from.TableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.InArrayPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
@@ -24,7 +29,10 @@ import org.hibernate.sql.ast.tree.predicate.NullnessPredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 import org.hibernate.sql.model.internal.TableInsertStandard;
 import org.hibernate.type.SqlTypes;
 
@@ -58,6 +66,55 @@ public class PostgreSQLSqlAstTranslator<T extends JdbcOperation> extends SqlAstT
 		appendSql( "default values" );
 	}
 
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void renderTableReferenceIdentificationVariable(TableReference tableReference) {
+		final String identificationVariable = tableReference.getIdentificationVariable();
+		if ( identificationVariable != null ) {
+			final Clause currentClause = getClauseStack().getCurrent();
+			if ( currentClause == Clause.INSERT ) {
+				// PostgreSQL requires the "as" keyword for inserts
+				appendSql( " as " );
+			}
+			else {
+				append( WHITESPACE );
+			}
+			append( tableReference.getIdentificationVariable() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		final Statement currentStatement = getStatementStack().getCurrent();
+		if ( !( currentStatement instanceof UpdateStatement )
+				|| !hasNonTrivialFromClause( ( (UpdateStatement) currentStatement ).getFromClause() ) ) {
+			// For UPDATE statements we render a full FROM clause and a join condition to match target table rows,
+			// but for that to work, we have to omit the alias for the target table reference here
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		renderFromClauseJoiningDmlTargetReference( statement );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitStandardConflictClause( conflictClause );
+	}
 
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {

hibernate-core/src/main/java/org/hibernate/dialect/SQLServerDialect.java

@@ -49,6 +49,8 @@ import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.exception.ConstraintViolationException;
 import org.hibernate.exception.LockTimeoutException;
 import org.hibernate.exception.spi.SQLExceptionConversionDelegate;
+import org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor;
+import org.hibernate.exception.spi.ViolatedConstraintNameExtractor;
 import org.hibernate.internal.util.JdbcExceptionHelper;
 import org.hibernate.mapping.Column;
 import org.hibernate.persister.entity.mutation.EntityMutationTarget;
@@ -84,6 +86,7 @@ import org.hibernate.type.descriptor.sql.spi.DdlTypeRegistry;
 
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.exception.spi.TemplatedViolatedConstraintNameExtractor.extractUsingTemplate;
 import static org.hibernate.query.sqm.TemporalUnit.NANOSECOND;
 import static org.hibernate.query.sqm.produce.function.FunctionParameterType.INTEGER;
 import static org.hibernate.type.SqlTypes.BLOB;
@@ -699,6 +702,21 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
 		return true;
 	}
 
+	@Override
+	public ViolatedConstraintNameExtractor getViolatedConstraintNameExtractor() {
+		return new TemplatedViolatedConstraintNameExtractor(
+				sqle -> {
+					switch ( JdbcExceptionHelper.extractErrorCode( sqle ) ) {
+						case 2627:
+						case 2601:
+							return extractUsingTemplate( "'", "'", sqle.getMessage() );
+						default:
+							return null;
+					}
+				}
+		);
+	}
+
 	@Override
 	public SQLExceptionConversionDelegate buildSQLExceptionConversionDelegate() {
 		return (sqlException, message, sql) -> {
@@ -712,6 +730,13 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
 				case 1222:
 					return new LockTimeoutException( message, sqlException, sql );
 				case 2627:
+					return new ConstraintViolationException(
+							message,
+							sqlException,
+							sql,
+							ConstraintViolationException.ConstraintKind.UNIQUE,
+							getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+					);
 				case 2601:
 					return new ConstraintViolationException(
 							message,
@@ -1106,4 +1131,14 @@ public class SQLServerDialect extends AbstractTransactSQLDialect {
 		final SQLServerSqlAstTranslator<JdbcOperation> translator = new SQLServerSqlAstTranslator<>( factory, optionalTableUpdate );
 		return translator.createMergeOperation( optionalTableUpdate );
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/SQLServerSqlAstTranslator.java

@@ -11,14 +11,19 @@ import java.util.List;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.metamodel.mapping.JdbcMappingContainer;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.query.sqm.FetchClauseType;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstJoinType;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
@@ -28,12 +33,15 @@ import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.TableReference;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
 import org.hibernate.sql.ast.tree.select.SortSpecification;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 import org.hibernate.sql.model.internal.OptionalTableUpdate;
 import org.hibernate.type.SqlTypes;
@@ -53,6 +61,85 @@ public class SQLServerSqlAstTranslator<T extends JdbcOperation> extends SqlAstTr
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+			// A merge statement must end with a `;` on SQL Server
+			appendSql( ';' );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		appendSql( "update" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.UPDATE );
+			renderTableReferenceIdentificationVariable( updateStatement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		if ( statement.getFromClause().getRoots().isEmpty() ) {
+			appendSql( " from " );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+		}
+		else {
+			visitFromClause( statement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean needsRecursiveKeywordInWithClause() {
 		return false;
@@ -128,14 +215,7 @@ public class SQLServerSqlAstTranslator<T extends JdbcOperation> extends SqlAstTr
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );

hibernate-core/src/main/java/org/hibernate/dialect/SybaseASEDialect.java

@@ -633,28 +633,17 @@ public class SybaseASEDialect extends SybaseDialect {
 				final int errorCode = JdbcExceptionHelper.extractErrorCode( sqle );
 				if ( sqlState != null ) {
 					switch ( sqlState ) {
-						// UNIQUE VIOLATION
 						case "S1000":
-							if ( 2601 == errorCode ) {
-								return extractUsingTemplate( "with unique index '", "'", sqle.getMessage() );
-							}
-							break;
 						case "23000":
-							if ( 546 == errorCode ) {
+							switch ( errorCode ) {
+								case 2601:
+									// UNIQUE VIOLATION
+									return extractUsingTemplate( "with unique index '", "'", sqle.getMessage() );
+								case 546:
 									// Foreign key violation
 									return extractUsingTemplate( "constraint name = '", "'", sqle.getMessage() );
 							}
 							break;
-	//					// FOREIGN KEY VIOLATION
-	//					case 23503:
-	//						return extractUsingTemplate( "violates foreign key constraint \"","\"", sqle.getMessage() );
-	//					// NOT NULL VIOLATION
-	//					case 23502:
-	//						return extractUsingTemplate( "null value in column \"","\" violates not-null constraint", sqle.getMessage() );
-	//					// TODO: RESTRICT VIOLATION
-	//					case 23001:
-	//						return null;
-						// ALL OTHER
 					}
 				}
 				return null;
@@ -671,30 +660,44 @@ public class SybaseASEDialect extends SybaseDialect {
 					case "JZ006":
 						return new LockTimeoutException( message, sqlException, sql );
 					case "S1000":
+					case "23000":
 						switch ( errorCode ) {
 							case 515:
 								// Attempt to insert NULL value into column; column does not allow nulls.
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
+							case 546:
+								// Foreign key violation
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
 							case 2601:
 								// Unique constraint violation
-								final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-										sqlException );
-								return new ConstraintViolationException( message, sqlException, sql, constraintName );
+								return new ConstraintViolationException(
+										message,
+										sqlException,
+										sql,
+										ConstraintViolationException.ConstraintKind.UNIQUE,
+										getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+								);
 						}
 						break;
 					case "ZZZZZ":
 						if ( 515 == errorCode ) {
 							// Attempt to insert NULL value into column; column does not allow nulls.
-							final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-									sqlException );
-							return new ConstraintViolationException( message, sqlException, sql, constraintName );
-						}
-						break;
-					case "23000":
-						if ( 546 == errorCode ) {
-							// Foreign key violation
-							final String constraintName = getViolatedConstraintNameExtractor().extractConstraintName(
-									sqlException );
-							return new ConstraintViolationException( message, sqlException, sql, constraintName );
+							return new ConstraintViolationException(
+									message,
+									sqlException,
+									sql,
+									getViolatedConstraintNameExtractor().extractConstraintName( sqlException )
+							);
 						}
 						break;
 				}

hibernate-core/src/main/java/org/hibernate/dialect/SybaseASESqlAstTranslator.java

@@ -12,13 +12,17 @@ import java.util.function.Consumer;
 import org.hibernate.LockMode;
 import org.hibernate.LockOptions;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstJoinType;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
@@ -33,6 +37,9 @@ import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
@@ -40,6 +47,7 @@ import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectClause;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 
 /**
@@ -55,6 +63,77 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+				renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		appendSql( "update " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.UPDATE );
+			renderDmlTargetTableExpression( updateStatement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		if ( statement.getFromClause().getRoots().isEmpty() ) {
+			appendSql( " from " );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+		}
+		else {
+			visitFromClause( statement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClause() {
 		return false;
@@ -130,14 +209,7 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );
@@ -250,6 +322,14 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 		visitValuesListEmulateSelectUnion( valuesList );
 	}
 
+	@Override
+	public void visitValuesTableReference(ValuesTableReference tableReference) {
+		append( '(' );
+		visitValuesListEmulateSelectUnion( tableReference.getValuesList() );
+		append( ')' );
+		renderDerivedTableReference( tableReference );
+	}
+
 	@Override
 	public void visitOffsetFetchClause(QueryPart queryPart) {
 		assertRowsOnlyFetchClauseType( queryPart );
@@ -384,9 +464,16 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 	}
 
 	@Override
-	public void visitColumnReference(ColumnReference columnReference) {
-		final String dmlTargetTableAlias = getDmlTargetTableAlias();
-		if ( dmlTargetTableAlias != null && dmlTargetTableAlias.equals( columnReference.getQualifier() ) ) {
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		if ( qualifierSupport == DmlTargetColumnQualifierSupport.TABLE_ALIAS
+				|| ( currentDmlStatement = getCurrentDmlStatement() ) == null
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
 		// Sybase needs a table name prefix
 		// but not if this is a restricted union table reference subquery
 		final QuerySpec currentQuerySpec = (QuerySpec) getQueryPartStack().getCurrent();
@@ -394,53 +481,15 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 		if ( currentQuerySpec != null && !currentQuerySpec.isRoot()
 				&& (roots = currentQuerySpec.getFromClause().getRoots()).size() == 1
 				&& roots.get( 0 ).getPrimaryTableReference() instanceof UnionTableReference ) {
-				columnReference.appendReadExpression( this );
+			return columnReference.getQualifier();
 		}
-			// for now, use the unqualified form
 		else if ( columnReference.isColumnExpressionFormula() ) {
 			// For formulas, we have to replace the qualifier as the alias was already rendered into the formula
 			// This is fine for now as this is only temporary anyway until we render aliases for table references
-				appendSql(
-						columnReference.getColumnExpression()
-								.replaceAll( "(\\b)(" + dmlTargetTableAlias + "\\.)(\\b)", "$1$3" )
-				);
+			return null;
 		}
 		else {
-				columnReference.appendReadExpression(
-						this,
-						getCurrentDmlStatement().getTargetTable().getTableExpression()
-				);
-			}
-		}
-		else {
-			columnReference.appendReadExpression( this );
-		}
-	}
-
-	@Override
-	public void visitAggregateColumnWriteExpression(AggregateColumnWriteExpression aggregateColumnWriteExpression) {
-		final String dmlTargetTableAlias = getDmlTargetTableAlias();
-		final ColumnReference columnReference = aggregateColumnWriteExpression.getColumnReference();
-		if ( dmlTargetTableAlias != null && dmlTargetTableAlias.equals( columnReference.getQualifier() ) ) {
-			// Sybase needs a table name prefix
-			// but not if this is a restricted union table reference subquery
-			final QuerySpec currentQuerySpec = (QuerySpec) getQueryPartStack().getCurrent();
-			final List<TableGroup> roots;
-			if ( currentQuerySpec != null && !currentQuerySpec.isRoot()
-					&& (roots = currentQuerySpec.getFromClause().getRoots()).size() == 1
-					&& roots.get( 0 ).getPrimaryTableReference() instanceof UnionTableReference ) {
-				aggregateColumnWriteExpression.appendWriteExpression( this, this );
-			}
-			else {
-				aggregateColumnWriteExpression.appendWriteExpression(
-						this,
-						this,
-						getCurrentDmlStatement().getTargetTable().getTableExpression()
-				);
-			}
-		}
-		else {
-			aggregateColumnWriteExpression.appendWriteExpression( this, this );
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
 		}
 	}
 
@@ -465,8 +514,8 @@ public class SybaseASESqlAstTranslator<T extends JdbcOperation> extends Abstract
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from (select 1) dual(c1)";
+	protected String getDual() {
+		return "(select 1 c1)";
 	}
 
 	private boolean supportsParameterOffsetFetchExpression() {

hibernate-core/src/main/java/org/hibernate/dialect/SybaseDialect.java

@@ -514,4 +514,14 @@ public class SybaseDialect extends AbstractTransactSQLDialect {
 				? AbstractTransactSQLIdentityColumnSupport.INSTANCE
 				: SybaseJconnIdentityColumnSupport.INSTANCE;
 	}
+
+	@Override
+	public DmlTargetColumnQualifierSupport getDmlTargetColumnQualifierSupport() {
+		return DmlTargetColumnQualifierSupport.TABLE_ALIAS;
+	}
+
+	@Override
+	public boolean supportsFromClauseInUpdate() {
+		return true;
+	}
 }

hibernate-core/src/main/java/org/hibernate/dialect/SybaseSqlAstTranslator.java

@@ -11,12 +11,15 @@ import java.util.function.Consumer;
 
 import org.hibernate.LockMode;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.query.IllegalQueryOperationException;
 import org.hibernate.query.sqm.ComparisonOperator;
 import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlSelection;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.BinaryArithmeticExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSearchedExpression;
 import org.hibernate.sql.ast.tree.expression.CaseSimpleExpression;
@@ -26,8 +29,13 @@ import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.expression.Summarization;
 import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
+import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
+import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperation;
 
 /**
@@ -43,6 +51,46 @@ public class SybaseSqlAstTranslator<T extends JdbcOperation> extends AbstractSql
 		super( sessionFactory, statement );
 	}
 
+	@Override
+	protected void visitInsertStatementOnly(InsertSelectStatement statement) {
+		if ( statement.getConflictClause() == null || statement.getConflictClause().isDoNothing() ) {
+			// Render plain insert statement and possibly run into unique constraint violation
+			super.visitInsertStatementOnly( statement );
+		}
+		else {
+			visitInsertStatementEmulateMerge( statement );
+			appendSql( ';' );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete " );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderDmlTargetTableExpression( statement.getTargetTable() );
+		}
+		finally {
+			clauseStack.pop();
+		}
+		visitFromClause( statement.getFromClause() );
+	}
+
+	@Override
+	protected void renderFromClauseAfterUpdateSet(UpdateStatement statement) {
+		visitFromClause( statement.getFromClause() );
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		if ( conflictClause != null ) {
+			if ( conflictClause.isDoUpdate() && conflictClause.getConstraintName() != null ) {
+				throw new IllegalQueryOperationException( "Insert conflict do update clause with constraint name is not supported" );
+			}
+		}
+	}
+
 	@Override
 	protected boolean supportsWithClause() {
 		return false;
@@ -118,14 +166,7 @@ public class SybaseSqlAstTranslator<T extends JdbcOperation> extends AbstractSql
 			appendSql( " )" );
 
 			registerAffectedTable( tableReference );
-			final Clause currentClause = getClauseStack().getCurrent();
-			if ( rendersTableReferenceAlias( currentClause ) ) {
-				final String identificationVariable = tableReference.getIdentificationVariable();
-				if ( identificationVariable != null ) {
-					appendSql( ' ' );
-					appendSql( identificationVariable );
-				}
-			}
+			renderTableReferenceIdentificationVariable( tableReference );
 		}
 		else {
 			super.renderNamedTableReference( tableReference, lockMode );
@@ -146,6 +187,19 @@ public class SybaseSqlAstTranslator<T extends JdbcOperation> extends AbstractSql
 		// Sybase does not support the FOR UPDATE clause
 	}
 
+	@Override
+	protected void visitValuesList(List<Values> valuesList) {
+		visitValuesListEmulateSelectUnion( valuesList );
+	}
+
+	@Override
+	public void visitValuesTableReference(ValuesTableReference tableReference) {
+		append( '(' );
+		visitValuesListEmulateSelectUnion( tableReference.getValuesList() );
+		append( ')' );
+		renderDerivedTableReference( tableReference );
+	}
+
 	@Override
 	public void visitOffsetFetchClause(QueryPart queryPart) {
 		assertRowsOnlyFetchClauseType( queryPart );

hibernate-core/src/main/java/org/hibernate/dialect/TiDBSqlAstTranslator.java

@@ -6,23 +6,38 @@
  */
 package org.hibernate.dialect;
 
+import java.util.ArrayList;
+import java.util.List;
+
 import org.hibernate.LockOptions;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.AbstractSqlAstTranslator;
+import org.hibernate.sql.ast.tree.MutationStatement;
 import org.hibernate.sql.ast.tree.Statement;
+import org.hibernate.sql.ast.tree.delete.DeleteStatement;
 import org.hibernate.sql.ast.tree.expression.CastTarget;
+import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.Literal;
 import org.hibernate.sql.ast.tree.expression.Summarization;
+import org.hibernate.sql.ast.tree.from.NamedTableReference;
 import org.hibernate.sql.ast.tree.from.QueryPartTableReference;
 import org.hibernate.sql.ast.tree.from.ValuesTableReference;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
+import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.predicate.BooleanExpressionPredicate;
 import org.hibernate.sql.ast.tree.predicate.LikePredicate;
 import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
+import org.hibernate.sql.ast.tree.select.SelectStatement;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
+import org.hibernate.sql.exec.internal.JdbcOperationQueryInsertImpl;
 import org.hibernate.sql.exec.spi.JdbcOperation;
+import org.hibernate.sql.exec.spi.JdbcOperationQueryInsert;
 
 /**
  * A SQL AST translator for TiDB.
@@ -39,6 +54,135 @@ public class TiDBSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 		this.dialect = (TiDBDialect) super.getDialect();
 	}
 
+	@Override
+	protected void visitInsertSource(InsertSelectStatement statement) {
+		if ( statement.getSourceSelectStatement() != null ) {
+			if ( statement.getConflictClause() != null ) {
+				final List<ColumnReference> targetColumnReferences = statement.getTargetColumns();
+				final List<String> columnNames = new ArrayList<>( targetColumnReferences.size() );
+				for ( ColumnReference targetColumnReference : targetColumnReferences ) {
+					columnNames.add( targetColumnReference.getColumnExpression() );
+				}
+				appendSql( "select * from " );
+				emulateQueryPartTableReferenceColumnAliasing(
+						new QueryPartTableReference(
+								new SelectStatement( statement.getSourceSelectStatement() ),
+								"excluded",
+								columnNames,
+								false,
+								getSessionFactory()
+						)
+				);
+			}
+			else {
+				statement.getSourceSelectStatement().accept( this );
+			}
+		}
+		else {
+			visitValuesList( statement.getValuesList() );
+		}
+	}
+
+	@Override
+	public void visitColumnReference(ColumnReference columnReference) {
+		final Statement currentStatement;
+		if ( "excluded".equals( columnReference.getQualifier() )
+				&& ( currentStatement = getStatementStack().getCurrent() ) instanceof InsertSelectStatement
+				&& ( (InsertSelectStatement) currentStatement ).getSourceSelectStatement() == null ) {
+			// Accessing the excluded row for an insert-values statement in the conflict clause requires the values qualifier
+			appendSql( "values(" );
+			columnReference.appendReadExpression( this, null );
+			append( ')' );
+		}
+		else {
+			super.visitColumnReference( columnReference );
+		}
+	}
+
+	@Override
+	protected void renderDeleteClause(DeleteStatement statement) {
+		appendSql( "delete" );
+		final Stack<Clause> clauseStack = getClauseStack();
+		try {
+			clauseStack.push( Clause.DELETE );
+			renderTableReferenceIdentificationVariable( statement.getTargetTable() );
+			if ( statement.getFromClause().getRoots().isEmpty() ) {
+				appendSql( " from " );
+				renderDmlTargetTableExpression( statement.getTargetTable() );
+			}
+			else {
+				visitFromClause( statement.getFromClause() );
+			}
+		}
+		finally {
+			clauseStack.pop();
+		}
+	}
+
+	@Override
+	protected void renderUpdateClause(UpdateStatement updateStatement) {
+		if ( updateStatement.getFromClause().getRoots().isEmpty() ) {
+			super.renderUpdateClause( updateStatement );
+		}
+		else {
+			appendSql( "update " );
+			renderFromClauseSpaces( updateStatement.getFromClause() );
+		}
+	}
+
+	@Override
+	protected void renderDmlTargetTableExpression(NamedTableReference tableReference) {
+		super.renderDmlTargetTableExpression( tableReference );
+		if ( getClauseStack().getCurrent() != Clause.INSERT ) {
+			renderTableReferenceIdentificationVariable( tableReference );
+		}
+	}
+
+	@Override
+	protected boolean supportsJoinsInDelete() {
+		return true;
+	}
+
+	@Override
+	protected JdbcOperationQueryInsert translateInsert(InsertSelectStatement sqlAst) {
+		visitInsertStatement( sqlAst );
+
+		return new JdbcOperationQueryInsertImpl(
+				getSql(),
+				getParameterBinders(),
+				getAffectedTableNames(),
+				null
+		);
+	}
+
+	@Override
+	protected void visitConflictClause(ConflictClause conflictClause) {
+		visitOnDuplicateKeyConflictClause( conflictClause );
+	}
+
+	@Override
+	protected String determineColumnReferenceQualifier(ColumnReference columnReference) {
+		final DmlTargetColumnQualifierSupport qualifierSupport = getDialect().getDmlTargetColumnQualifierSupport();
+		final MutationStatement currentDmlStatement;
+		final String dmlAlias;
+		// Since TiDB does not support aliasing the insert target table,
+		// we must detect column reference that are used in the conflict clause
+		// and use the table expression as qualifier instead
+		if ( getClauseStack().getCurrent() != Clause.SET
+				|| !( ( currentDmlStatement = getCurrentDmlStatement() ) instanceof InsertSelectStatement )
+				|| ( dmlAlias = currentDmlStatement.getTargetTable().getIdentificationVariable() ) == null
+				|| !dmlAlias.equals( columnReference.getQualifier() ) ) {
+			return columnReference.getQualifier();
+		}
+		// Qualify the column reference with the table expression also when in subqueries
+		else if ( qualifierSupport != DmlTargetColumnQualifierSupport.NONE || !getQueryPartStack().isEmpty() ) {
+			return getCurrentDmlStatement().getTargetTable().getTableExpression();
+		}
+		else {
+			return null;
+		}
+	}
+
 	@Override
 	protected void renderExpressionAsClauseItem(Expression expression) {
 		expression.accept( this );
@@ -174,8 +318,8 @@ public class TiDBSqlAstTranslator<T extends JdbcOperation> extends AbstractSqlAs
 	}
 
 	@Override
-	protected String getFromDual() {
-		return " from dual";
+	protected String getDual() {
+		return "dual";
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/engine/spi/SessionDelegatorBaseImpl.java

@@ -53,6 +53,7 @@ import org.hibernate.procedure.ProcedureCall;
 import org.hibernate.query.MutationQuery;
 import org.hibernate.query.SelectionQuery;
 import org.hibernate.query.criteria.HibernateCriteriaBuilder;
+import org.hibernate.query.criteria.JpaCriteriaInsert;
 import org.hibernate.query.criteria.JpaCriteriaInsertSelect;
 import org.hibernate.query.spi.QueryImplementor;
 import org.hibernate.query.spi.QueryProducerImplementor;
@@ -513,6 +514,12 @@ public class SessionDelegatorBaseImpl implements SessionImplementor {
 		return delegate().createMutationQuery( insertSelect );
 	}
 
+	@Override
+	public MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsert insertSelect) {
+		//noinspection resource
+		return delegate().createMutationQuery( insertSelect );
+	}
+
 	@Override
 	public <T> QueryImplementor<T> createQuery(CriteriaQuery<T> criteriaQuery) {
 		return queryDelegate().createQuery( criteriaQuery );

hibernate-core/src/main/java/org/hibernate/engine/spi/SessionLazyDelegator.java

@@ -40,6 +40,7 @@ import org.hibernate.query.NativeQuery;
 import org.hibernate.query.Query;
 import org.hibernate.query.SelectionQuery;
 import org.hibernate.query.criteria.HibernateCriteriaBuilder;
+import org.hibernate.query.criteria.JpaCriteriaInsert;
 import org.hibernate.query.criteria.JpaCriteriaInsertSelect;
 import org.hibernate.stat.SessionStatistics;
 
@@ -773,6 +774,11 @@ public class SessionLazyDelegator implements Session {
 		return this.lazySession.get().createMutationQuery( insertSelect );
 	}
 
+	@Override
+	public MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsert insertSelect) {
+		return this.lazySession.get().createMutationQuery( insertSelect );
+	}
+
 	@Override
 	public MutationQuery createNativeMutationQuery(String sqlString) {
 		return this.lazySession.get().createNativeMutationQuery( sqlString );

hibernate-core/src/main/java/org/hibernate/engine/spi/SharedSessionDelegatorBaseImpl.java

@@ -34,6 +34,7 @@ import org.hibernate.procedure.ProcedureCall;
 import org.hibernate.query.MutationQuery;
 import org.hibernate.query.SelectionQuery;
 import org.hibernate.query.criteria.HibernateCriteriaBuilder;
+import org.hibernate.query.criteria.JpaCriteriaInsert;
 import org.hibernate.query.criteria.JpaCriteriaInsertSelect;
 import org.hibernate.query.spi.QueryImplementor;
 import org.hibernate.query.spi.QueryProducerImplementor;
@@ -101,6 +102,12 @@ public class SharedSessionDelegatorBaseImpl implements SharedSessionContractImpl
 		return delegate().createMutationQuery( insertSelect );
 	}
 
+	@Override
+	public MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsert insertSelect) {
+		//noinspection resource
+		return delegate().createMutationQuery( insertSelect );
+	}
+
 	@Override
 	public <T> QueryImplementor<T> createQuery(CriteriaQuery<T> criteriaQuery) {
 		return queryDelegate().createQuery( criteriaQuery );

hibernate-core/src/main/java/org/hibernate/exception/ConstraintViolationException.java

@@ -19,15 +19,26 @@ import org.checkerframework.checker.nullness.qual.Nullable;
  */
 public class ConstraintViolationException extends JDBCException {
 
+	private final ConstraintKind kind;
 	private final @Nullable String constraintName;
 
 	public ConstraintViolationException(String message, SQLException root, @Nullable String constraintName) {
-		super( message, root );
-		this.constraintName = constraintName;
+		this( message, root, ConstraintKind.OTHER, constraintName );
 	}
 
 	public ConstraintViolationException(String message, SQLException root, String sql, @Nullable String constraintName) {
+		this( message, root, sql, ConstraintKind.OTHER, constraintName );
+	}
+
+	public ConstraintViolationException(String message, SQLException root, ConstraintKind kind, @Nullable String constraintName) {
+		super( message, root );
+		this.kind = kind;
+		this.constraintName = constraintName;
+	}
+
+	public ConstraintViolationException(String message, SQLException root, String sql, ConstraintKind kind, @Nullable String constraintName) {
 		super( message, root, sql );
+		this.kind = kind;
 		this.constraintName = constraintName;
 	}
 
@@ -39,4 +50,16 @@ public class ConstraintViolationException extends JDBCException {
 	public @Nullable String getConstraintName() {
 		return constraintName;
 	}
+
+	/**
+	 * Returns the kind of constraint that was violated.
+	 */
+	public ConstraintKind getKind() {
+		return kind;
+	}
+
+	public enum ConstraintKind {
+		UNIQUE,
+		OTHER
+	}
 }

hibernate-core/src/main/java/org/hibernate/internal/AbstractSharedSessionContract.java

@@ -70,6 +70,7 @@ import org.hibernate.query.SelectionQuery;
 import org.hibernate.query.UnknownNamedQueryException;
 import org.hibernate.query.criteria.CriteriaDefinition;
 import org.hibernate.query.criteria.HibernateCriteriaBuilder;
+import org.hibernate.query.criteria.JpaCriteriaInsert;
 import org.hibernate.query.criteria.JpaCriteriaInsertSelect;
 import org.hibernate.query.hql.spi.SqmQueryImplementor;
 import org.hibernate.query.named.NamedResultSetMappingMemento;
@@ -88,6 +89,7 @@ import org.hibernate.query.sqm.tree.SqmDmlStatement;
 import org.hibernate.query.sqm.tree.SqmStatement;
 import org.hibernate.query.sqm.tree.delete.SqmDeleteStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
+import org.hibernate.query.sqm.tree.insert.SqmInsertStatement;
 import org.hibernate.query.sqm.tree.select.SqmQueryGroup;
 import org.hibernate.query.sqm.tree.select.SqmQuerySpec;
 import org.hibernate.query.sqm.tree.select.SqmSelectStatement;
@@ -1236,6 +1238,17 @@ public abstract class AbstractSharedSessionContract implements SharedSessionCont
 		}
 	}
 
+	@Override
+	public MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsert insertSelect) {
+		checkOpen();
+		try {
+			return createCriteriaQuery( (SqmInsertStatement<?>) insertSelect, null );
+		}
+		catch ( RuntimeException e ) {
+			throw getExceptionConverter().convert( e );
+		}
+	}
+
 	@Override
 	@SuppressWarnings("UnnecessaryLocalVariable")
 	public ProcedureCall getNamedProcedureCall(String name) {

hibernate-core/src/main/java/org/hibernate/mapping/PrimaryKey.java

@@ -65,7 +65,11 @@ public class PrimaryKey extends Constraint {
 	}
 
 	public String sqlConstraintString(Dialect dialect) {
-		StringBuilder buf = new StringBuilder("primary key (");
+		StringBuilder buf = new StringBuilder();
+		if ( orderingUniqueKey != null && orderingUniqueKey.isNameExplicit() ) {
+			buf.append( "constraint " ).append( orderingUniqueKey.getName() ).append( ' ' );
+		}
+		buf.append( "primary key (" );
 		boolean first = true;
 		for ( Column column : getColumns() ) {
 			if ( first ) {

hibernate-core/src/main/java/org/hibernate/query/QueryProducer.java

@@ -6,6 +6,7 @@
  */
 package org.hibernate.query;
 
+import org.hibernate.query.criteria.JpaCriteriaInsert;
 import org.hibernate.query.criteria.JpaCriteriaInsertSelect;
 
 import jakarta.persistence.criteria.CriteriaDelete;
@@ -323,6 +324,11 @@ public interface QueryProducer {
 	 */
 	MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsertSelect insertSelect);
 
+	/**
+	 * Create a {@link MutationQuery} from the given insert criteria tree
+	 */
+	MutationQuery createMutationQuery(@SuppressWarnings("rawtypes") JpaCriteriaInsert insertSelect);
+
 	/**
 	 * Create a {@link NativeQuery} instance for the given native SQL statement.
 	 *

hibernate-core/src/main/java/org/hibernate/query/criteria/HibernateCriteriaBuilder.java

@@ -123,6 +123,12 @@ public interface HibernateCriteriaBuilder extends CriteriaBuilder {
 
 	<T> JpaCriteriaInsertSelect<T> createCriteriaInsertSelect(Class<T> targetEntity);
 
+	@Incubating
+	JpaValues values(Expression<?>... expressions);
+
+	@Incubating
+	JpaValues values(List<? extends Expression<?>> expressions);
+
 	/**
 	 * Transform the given HQL {@code select} query to an equivalent criteria query.
 	 *
@@ -693,8 +699,6 @@ public interface HibernateCriteriaBuilder extends CriteriaBuilder {
 
 	<T> JpaExpression<T> value(T value);
 
-	<V, C extends Collection<V>> JpaExpression<Collection<V>> values(C collection);
-
 	@Override
 	<V, M extends Map<?, V>> Expression<Collection<V>> values(M map);
 

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaConflictClause.java

@@ -0,0 +1,107 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.query.criteria;
+
+import java.util.List;
+
+import org.hibernate.Incubating;
+
+import jakarta.persistence.criteria.Path;
+import jakarta.persistence.metamodel.SingularAttribute;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/**
+ * A conflict clause for insert statements.
+ *
+ * @since 6.5
+ */
+@Incubating
+public interface JpaConflictClause<T> {
+
+	/**
+	 * The excluded row/object which was not inserted.
+	 */
+	JpaRoot<T> getExcludedRoot();
+
+	/**
+	 * The unique constraint name for which a constraint violation is allowed.
+	 */
+	@Nullable String getConstraintName();
+
+	/**
+	 * Sets the unique constraint name for which a constraint violation is allowed.
+	 *
+	 * @throws IllegalStateException when constraint paths have already been defined
+	 */
+	JpaConflictClause<T> conflictOnConstraint(@Nullable String constraintName);
+
+	/**
+	 * The paths which are part of a unique constraint, for which a constraint violation is allowed.
+	 */
+	List<? extends JpaPath<?>> getConstraintPaths();
+
+	/**
+	 * Shorthand for calling {@link #conflictOnConstraintPaths(List)} with paths resolved for the given attributes
+	 * against the insert target.
+	 */
+	JpaConflictClause<T> conflictOnConstraintAttributes(String... attributes);
+
+	/**
+	 * Shorthand for calling {@link #conflictOnConstraintPaths(List)} with paths resolved for the given attributes
+	 * against the insert target.
+	 */
+	JpaConflictClause<T> conflictOnConstraintAttributes(SingularAttribute<T, ?>... attributes);
+
+	/**
+	 * See {@link #conflictOnConstraintPaths(List)}.
+	 */
+	JpaConflictClause<T> conflictOnConstraintPaths(Path<?>... paths);
+
+	/**
+	 * Sets the paths which are part of a unique constraint, for which a constraint violation is allowed.
+	 *
+	 * @throws IllegalStateException when a constraint name has already been defined
+	 */
+	JpaConflictClause<T> conflictOnConstraintPaths(List<? extends Path<?>> paths);
+
+	/**
+	 * The action to do when a conflict due to a unique constraint violation happens.
+	 */
+	@Nullable JpaConflictUpdateAction<T> getConflictAction();
+
+	/**
+	 * Sets the action to do on a conflict. Setting {@code null} means to do nothing.
+	 *
+	 * @see #createConflictUpdateAction()
+	 */
+	JpaConflictClause<T> onConflictDo(@Nullable JpaConflictUpdateAction<T> action);
+
+	/**
+	 * Shorthand version for calling {@link #onConflictDo(JpaConflictUpdateAction)} with {@link #createConflictUpdateAction()}
+	 * as argument and returning the update action.
+	 */
+	default JpaConflictUpdateAction<T> onConflictDoUpdate() {
+		final JpaConflictUpdateAction<T> conflictUpdateAction = createConflictUpdateAction();
+		onConflictDo( conflictUpdateAction );
+		return conflictUpdateAction;
+	}
+
+	/**
+	 * Shorthand version for calling {@link #onConflictDo(JpaConflictUpdateAction)} with a {@code null} argument.
+	 */
+	default JpaConflictClause<T> onConflictDoNothing() {
+		return onConflictDo( null );
+	}
+
+	/**
+	 * Create a new conflict update action for this insert statement.
+	 *
+	 * @return a new conflict update action
+	 * @see #onConflictDo(JpaConflictUpdateAction)
+	 */
+	JpaConflictUpdateAction<T> createConflictUpdateAction();
+}

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaConflictUpdateAction.java

@@ -0,0 +1,92 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
+ * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
+ */
+package org.hibernate.query.criteria;
+
+import org.hibernate.Incubating;
+
+import jakarta.persistence.criteria.Expression;
+import jakarta.persistence.criteria.Path;
+import jakarta.persistence.criteria.Predicate;
+import jakarta.persistence.metamodel.SingularAttribute;
+
+/**
+ * The update action that should happen on a unique constraint violation for an insert statement.
+ *
+ * @since 6.5
+ */
+@Incubating
+public interface JpaConflictUpdateAction<T> {
+
+	/**
+	 * Update the value of the specified attribute.
+	 * @param attribute  attribute to be updated
+	 * @param value  new value
+	 * @return  the modified update query
+	 */
+	<Y, X extends Y> JpaConflictUpdateAction<T> set(SingularAttribute<? super T, Y> attribute, X value);
+
+	/**
+	 * Update the value of the specified attribute.
+	 * @param attribute  attribute to be updated
+	 * @param value  new value
+	 * @return  the modified update query
+	 */
+	<Y> JpaConflictUpdateAction<T> set(SingularAttribute<? super T, Y> attribute, Expression<? extends Y> value);
+
+	/**
+	 * Update the value of the specified attribute.
+	 * @param attribute  attribute to be updated
+	 * @param value  new value
+	 * @return  the modified update query
+	 */
+	<Y, X extends Y> JpaConflictUpdateAction<T> set(Path<Y> attribute, X value);
+
+	/**
+	 * Update the value of the specified attribute.
+	 * @param attribute  attribute to be updated
+	 * @param value  new value
+	 * @return  the modified update query
+	 */
+	<Y> JpaConflictUpdateAction<T> set(Path<Y> attribute, Expression<? extends Y> value);
+
+	/**
+	 * Update the value of the specified attribute.
+	 * @param attributeName  name of the attribute to be updated
+	 * @param value  new value
+	 * @return  the modified update query
+	 */
+	JpaConflictUpdateAction<T> set(String attributeName, Object value);
+
+	/**
+	 * Modify the update query to restrict the target of the update
+	 * according to the specified boolean expression.
+	 * Replaces the previously added restriction(s), if any.
+	 * @param restriction  a simple or compound boolean expression
+	 * @return the modified update query
+	 */
+	JpaConflictUpdateAction<T> where(Expression<Boolean> restriction);
+
+	/**
+	 * Modify the update query to restrict the target of the update
+	 * according to the conjunction of the specified restriction 
+	 * predicates.
+	 * Replaces the previously added restriction(s), if any.
+	 * If no restrictions are specified, any previously added
+	 * restrictions are simply removed.
+	 * @param restrictions  zero or more restriction predicates
+	 * @return the modified update query
+	 */
+	JpaConflictUpdateAction<T> where(Predicate... restrictions);
+
+	/**
+	 * Return the predicate that corresponds to the where clause
+	 * restriction(s), or null if no restrictions have been
+	 * specified.
+	 * @return where clause predicate
+	 */
+	JpaPredicate getRestriction();
+}

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaCriteriaInsert.java

@@ -0,0 +1,62 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.query.criteria;
+
+import java.util.List;
+
+import org.hibernate.Incubating;
+
+import jakarta.persistence.criteria.Path;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/**
+ * The commonalities between insert-select and insert-values.
+ *
+ * @since 6.5
+ */
+@Incubating
+public interface JpaCriteriaInsert<T> extends JpaManipulationCriteria<T> {
+
+	/**
+	 * Returns the insertion target paths.
+	 */
+	List<? extends JpaPath<?>> getInsertionTargetPaths();
+
+	/**
+	 * Sets the insertion target paths.
+	 */
+	JpaCriteriaInsert<T> setInsertionTargetPaths(Path<?>... insertionTargetPaths);
+
+	/**
+	 * Sets the insertion target paths.
+	 */
+	JpaCriteriaInsert<T> setInsertionTargetPaths(List<? extends Path<?>> insertionTargetPaths);
+
+	/**
+	 * Sets the conflict clause that defines what happens when an insert violates a unique constraint.
+	 */
+	JpaConflictClause<T> onConflict();
+
+	/**
+	 * Sets the conflict clause that defines what happens when an insert violates a unique constraint.
+	 */
+	JpaCriteriaInsert<T> onConflict(@Nullable JpaConflictClause<T> conflictClause);
+
+	/**
+	 * Returns the conflict clause that defines what happens when an insert violates a unique constraint,
+	 * or {@code null} if there is none.
+	 */
+	@Nullable JpaConflictClause<T> getConflictClause();
+
+	/**
+	 * Create a new conflict clause for this insert statement.
+	 *
+	 * @return a new conflict clause
+	 * @see JpaCriteriaInsert#onConflict(JpaConflictClause)
+	 */
+	JpaConflictClause<T> createConflictClause();
+}

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaCriteriaInsertSelect.java

@@ -8,6 +8,9 @@ package org.hibernate.query.criteria;
 
 import org.hibernate.Incubating;
 
+import jakarta.persistence.Tuple;
+import jakarta.persistence.criteria.CriteriaQuery;
+
 /**
  * A representation of SqmInsertSelectStatement at the
  * {@link org.hibernate.query.criteria} level, even though JPA does
@@ -30,5 +33,10 @@ import org.hibernate.Incubating;
  * @author Steve Ebersole
  */
 @Incubating
-public interface JpaCriteriaInsertSelect<T> extends JpaManipulationCriteria<T> {
+public interface JpaCriteriaInsertSelect<T> extends JpaCriteriaInsert<T> {
+
+	JpaCriteriaInsertSelect<T> select(CriteriaQuery<Tuple> criteriaQuery);
+
+	@Override
+	JpaCriteriaInsertSelect<T> onConflict(JpaConflictClause<T> conflictClause);
 }

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaCriteriaInsertValues.java

@@ -6,6 +6,8 @@
  */
 package org.hibernate.query.criteria;
 
+import java.util.List;
+
 import org.hibernate.Incubating;
 
 /**
@@ -13,7 +15,7 @@ import org.hibernate.Incubating;
  * {@link org.hibernate.query.criteria} level, even though JPA does
  * not define support for insert-values criteria.
  *
- * @see org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement
+ * @see org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement
  *
  * @apiNote Incubating mainly for 2 purposes:<ul>
  *     <li>
@@ -30,5 +32,13 @@ import org.hibernate.Incubating;
  * @author Gavin King
  */
 @Incubating
-public interface JpaCriteriaInsertValues<T> extends JpaManipulationCriteria<T> {
+public interface JpaCriteriaInsertValues<T> extends JpaCriteriaInsert<T> {
+
+	JpaCriteriaInsertValues<T> values(JpaValues... values);
+
+	JpaCriteriaInsertValues<T> values(List<? extends JpaValues> values);
+
+	@Override
+	JpaCriteriaInsertValues<T> onConflict(JpaConflictClause<T> conflictClause);
+
 }

hibernate-core/src/main/java/org/hibernate/query/criteria/JpaValues.java

@@ -0,0 +1,25 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.query.criteria;
+
+import java.util.List;
+
+import org.hibernate.Incubating;
+
+/**
+ * A tuple of values.
+ *
+ * @since 6.5
+ */
+@Incubating
+public interface JpaValues {
+
+	/**
+	 * Returns the expressions of this tuple.
+	 */
+	List<? extends JpaExpression<?>> getExpressions();
+}

hibernate-core/src/main/java/org/hibernate/query/criteria/spi/HibernateCriteriaBuilderDelegate.java

@@ -53,6 +53,7 @@ import org.hibernate.query.criteria.JpaSelection;
 import org.hibernate.query.criteria.JpaSetJoin;
 import org.hibernate.query.criteria.JpaSimpleCase;
 import org.hibernate.query.criteria.JpaSubQuery;
+import org.hibernate.query.criteria.JpaValues;
 import org.hibernate.query.criteria.JpaWindow;
 import org.hibernate.query.criteria.JpaWindowFrame;
 import org.hibernate.query.NullPrecedence;
@@ -148,6 +149,18 @@ public class HibernateCriteriaBuilderDelegate implements HibernateCriteriaBuilde
 		return criteriaBuilder.createCriteriaInsertSelect( targetEntity );
 	}
 
+	@Override
+	@Incubating
+	public JpaValues values(Expression<?>... expressions) {
+		return criteriaBuilder.values( expressions );
+	}
+
+	@Override
+	@Incubating
+	public JpaValues values(List<? extends Expression<?>> expressions) {
+		return criteriaBuilder.values( expressions );
+	}
+
 	@Override
 	public <T> JpaCriteriaQuery<T> unionAll(CriteriaQuery<? extends T> query1, CriteriaQuery<?>... queries) {
 		return criteriaBuilder.unionAll( query1, queries );
@@ -746,11 +759,6 @@ public class HibernateCriteriaBuilderDelegate implements HibernateCriteriaBuilde
 		return criteriaBuilder.value( value );
 	}
 
-	@Override
-	public <V, C extends Collection<V>> JpaExpression<Collection<V>> values(C collection) {
-		return criteriaBuilder.values( collection );
-	}
-
 	@Override
 	public <V, M extends Map<?, V>> Expression<Collection<V>> values(M map) {
 		return criteriaBuilder.values( map );

hibernate-core/src/main/java/org/hibernate/query/hql/internal/SemanticQueryBuilder.java

@@ -24,9 +24,11 @@ import java.time.ZonedDateTime;
 import java.time.temporal.TemporalAccessor;
 import java.util.ArrayList;
 import java.util.Calendar;
+import java.util.Collections;
 import java.util.GregorianCalendar;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -105,6 +107,7 @@ import org.hibernate.query.sqm.produce.function.FunctionArgumentException;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.spi.ParameterDeclarationContext;
 import org.hibernate.query.sqm.spi.SqmCreationContext;
+import org.hibernate.query.sqm.tree.AbstractSqmDmlStatement;
 import org.hibernate.query.sqm.tree.SqmJoinType;
 import org.hibernate.query.sqm.tree.SqmQuery;
 import org.hibernate.query.sqm.tree.SqmStatement;
@@ -171,6 +174,8 @@ import org.hibernate.query.sqm.tree.from.SqmFromClause;
 import org.hibernate.query.sqm.tree.from.SqmJoin;
 import org.hibernate.query.sqm.tree.from.SqmQualifiedJoin;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
+import org.hibernate.query.sqm.tree.insert.SqmConflictClause;
+import org.hibernate.query.sqm.tree.insert.SqmConflictUpdateAction;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
@@ -207,7 +212,10 @@ import org.hibernate.query.sqm.tree.select.SqmSelectableNode;
 import org.hibernate.query.sqm.tree.select.SqmSelection;
 import org.hibernate.query.sqm.tree.select.SqmSortSpecification;
 import org.hibernate.query.sqm.tree.select.SqmSubQuery;
+import org.hibernate.query.sqm.tree.update.SqmAssignment;
+import org.hibernate.query.sqm.tree.update.SqmSetClause;
 import org.hibernate.query.sqm.tree.update.SqmUpdateStatement;
+import org.hibernate.spi.NavigablePath;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.tree.cte.CteMaterialization;
 import org.hibernate.sql.ast.tree.cte.CteSearchClauseKind;
@@ -487,8 +495,6 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 			processingStateStack.push( processingState );
 
 			try {
-				queryExpressionContext.accept( this );
-
 				final SqmCreationProcessingState stateFieldsProcessingState = new SqmCreationProcessingStateImpl(
 						insertStatement,
 						this
@@ -506,6 +512,9 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 					processingStateStack.pop();
 				}
 
+				queryExpressionContext.accept( this );
+
+				insertStatement.onConflict( visitConflictClause( ctx.conflictClause() ) );
 				return insertStatement;
 			}
 			finally {
@@ -526,21 +535,43 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 			processingState.getPathRegistry().register( root );
 
 			try {
-				final HqlParser.ValuesListContext valuesListContext = ctx.valuesList();
-				for ( int i = 1; i < valuesListContext.getChildCount(); i += 2 ) {
-					final ParseTree values = valuesListContext.getChild( i );
-					final SqmValues sqmValues = new SqmValues();
-					for ( int j = 1; j < values.getChildCount(); j += 2 ) {
-						sqmValues.getExpressions().add( (SqmExpression<?>) values.getChild( j ).accept( this ) );
-					}
-					insertStatement.getValuesList().add( sqmValues );
-				}
-
 				for ( HqlParser.SimplePathContext stateFieldCtx : targetFieldsSpecContext.simplePath() ) {
 					final SqmPath<?> stateField = (SqmPath<?>) visitSimplePath( stateFieldCtx );
 					insertStatement.addInsertTargetStateField( stateField );
 				}
 
+				final ArrayList<SqmValues> valuesList = new ArrayList<>();
+				final HqlParser.ValuesListContext valuesListContext = ctx.valuesList();
+				for ( int i = 1; i < valuesListContext.getChildCount(); i += 2 ) {
+					final ParseTree values = valuesListContext.getChild( i );
+					final ArrayList<SqmExpression<?>> valuesExpressions = new ArrayList<>();
+					final Iterator<SqmPath<?>> iterator = insertStatement.getInsertionTargetPaths().iterator();
+					for ( int j = 1; j < values.getChildCount(); j += 2 ) {
+						final SqmPath<?> targetPath = iterator.next();
+						final Class<?> targetPathJavaType = targetPath.getJavaType();
+						final boolean isEnum = targetPathJavaType != null && targetPathJavaType.isEnum();
+						final ParseTree valuesContext = values.getChild( j );
+						final HqlParser.ExpressionContext expressionContext;
+						final Map<Class<?>, Enum<?>> possibleEnumValues;
+						final SqmExpression<?> value;
+						if ( isEnum && valuesContext.getChild( 0 ) instanceof HqlParser.ExpressionContext
+								&& ( possibleEnumValues = getPossibleEnumValues( expressionContext = (HqlParser.ExpressionContext) valuesContext.getChild( 0 ) ) ) != null ) {
+							value = resolveEnumShorthandLiteral(
+									expressionContext,
+									possibleEnumValues,
+									targetPathJavaType
+							);
+						}
+						else {
+							value = (SqmExpression<?>) valuesContext.accept( this );
+						}
+						valuesExpressions.add( value );
+					}
+					valuesList.add( new SqmValues( valuesExpressions ) );
+				}
+
+				insertStatement.values( valuesList );
+				insertStatement.onConflict( visitConflictClause( ctx.conflictClause() ) );
 				return insertStatement;
 			}
 			finally {
@@ -549,6 +580,42 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 		}
 	}
 
+	@Override
+	public SqmConflictClause<R> visitConflictClause(HqlParser.ConflictClauseContext ctx) {
+		if ( ctx == null ) {
+			return null;
+		}
+		final SqmCreationProcessingState processingState = processingStateStack.getCurrent();
+		final SqmInsertStatement<R> statement = (SqmInsertStatement<R>) processingState.getProcessingQuery();
+		final SqmConflictClause<R> conflictClause = new SqmConflictClause<>( statement );
+		final HqlParser.ConflictTargetContext conflictTargetContext = ctx.conflictTarget();
+		if ( conflictTargetContext != null ) {
+			final HqlParser.IdentifierContext identifierCtx = conflictTargetContext.identifier();
+			if ( identifierCtx != null ) {
+				conflictClause.conflictOnConstraint( visitIdentifier( identifierCtx ) );
+			}
+			else {
+				final List<SqmPath<?>> constraintAttributes = new ArrayList<>();
+				for ( HqlParser.SimplePathContext pathContext : conflictTargetContext.simplePath() ) {
+					constraintAttributes.add( consumeDomainPath( pathContext ) );
+				}
+				conflictClause.conflictOnConstraintPaths( constraintAttributes );
+			}
+		}
+		final HqlParser.ConflictActionContext conflictActionContext = ctx.conflictAction();
+		final HqlParser.SetClauseContext setClauseContext = conflictActionContext.setClause();
+		if ( setClauseContext != null ) {
+			processingState.getPathRegistry().registerByAliasOnly( conflictClause.getExcludedRoot() );
+			final SqmConflictUpdateAction<R> updateAction = conflictClause.onConflictDoUpdate();
+			for ( HqlParser.AssignmentContext assignmentContext : setClauseContext.assignment() ) {
+				updateAction.addAssignment( visitAssignment( assignmentContext ) );
+			}
+			final SqmPredicate sqmPredicate = visitWhereClause( conflictActionContext.whereClause() );
+			updateAction.where( sqmPredicate );
+		}
+		return conflictClause;
+	}
+
 	@Override
 	public SqmUpdateStatement<R> visitUpdateStatement(HqlParser.UpdateStatementContext ctx) {
 		final boolean versioned = ctx.VERSIONED() != null;
@@ -577,12 +644,29 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 			final HqlParser.SetClauseContext setClauseCtx = ctx.setClause();
 			for ( ParseTree subCtx : setClauseCtx.children ) {
 				if ( subCtx instanceof HqlParser.AssignmentContext ) {
-					final HqlParser.AssignmentContext assignmentContext = (HqlParser.AssignmentContext) subCtx;
+					updateStatement.applyAssignment( visitAssignment( (HqlParser.AssignmentContext) subCtx ) );
+				}
+			}
+
+			final HqlParser.WhereClauseContext whereClauseContext = ctx.whereClause();
+			if ( whereClauseContext != null ) {
+				updateStatement.applyPredicate( visitWhereClause( whereClauseContext ) );
+			}
+
+			return updateStatement;
+		}
+		finally {
+			processingStateStack.pop();
+		}
+	}
+
+	@Override
+	public SqmAssignment<?> visitAssignment(HqlParser.AssignmentContext ctx) {
 		//noinspection unchecked
-					final SqmPath<Object> targetPath = (SqmPath<Object>) consumeDomainPath( assignmentContext.simplePath() );
+		final SqmPath<Object> targetPath = (SqmPath<Object>) consumeDomainPath( ctx.simplePath() );
 		final Class<?> targetPathJavaType = targetPath.getJavaType();
 		final boolean isEnum = targetPathJavaType != null && targetPathJavaType.isEnum();
-					final ParseTree rightSide = assignmentContext.getChild( 2 );
+		final ParseTree rightSide = ctx.getChild( 2 );
 		final HqlParser.ExpressionContext expressionContext;
 		final Map<Class<?>, Enum<?>> possibleEnumValues;
 		final SqmExpression<?> value;
@@ -597,20 +681,7 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 		else {
 			value = (SqmExpression<?>) rightSide.accept( this );
 		}
-					updateStatement.applyAssignment( targetPath, value );
-				}
-			}
-
-			final HqlParser.WhereClauseContext whereClauseContext = ctx.whereClause();
-			if ( whereClauseContext != null ) {
-				updateStatement.applyPredicate( visitWhereClause( whereClauseContext ) );
-			}
-
-			return updateStatement;
-		}
-		finally {
-			processingStateStack.pop();
-		}
+		return new SqmAssignment<>( targetPath, value );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/query/hql/internal/SqmPathRegistryImpl.java

@@ -71,26 +71,7 @@ public class SqmPathRegistryImpl implements SqmPathRegistry {
 		if ( sqmPath instanceof SqmFrom<?, ?> ) {
 			final SqmFrom<?, ?> sqmFrom = (SqmFrom<?, ?>) sqmPath;
 
-			final String alias = sqmPath.getExplicitAlias();
-			if ( alias != null ) {
-				final String aliasToUse = jpaCompliance.isJpaQueryComplianceEnabled()
-						? alias.toLowerCase( Locale.getDefault() )
-						: alias;
-
-				final SqmFrom<?, ?> previousFrom = sqmFromByAlias.put( aliasToUse, sqmFrom );
-
-				if ( previousFrom != null ) {
-					throw new AliasCollisionException(
-							String.format(
-									Locale.ENGLISH,
-									"Alias [%s] used for multiple from-clause elements : %s, %s",
-									alias,
-									previousFrom,
-									sqmPath
-							)
-					);
-				}
-			}
+			registerByAliasOnly( sqmFrom );
 
 			final SqmFrom<?, ?> previousFromByPath = sqmFromByPath.put( sqmPath.getNavigablePath(), sqmFrom );
 
@@ -124,6 +105,30 @@ public class SqmPathRegistryImpl implements SqmPathRegistry {
 		}
 	}
 
+	@Override
+	public void registerByAliasOnly(SqmFrom<?, ?> sqmFrom) {
+		final String alias = sqmFrom.getExplicitAlias();
+		if ( alias != null ) {
+			final String aliasToUse = jpaCompliance.isJpaQueryComplianceEnabled()
+					? alias.toLowerCase( Locale.getDefault() )
+					: alias;
+
+			final SqmFrom<?, ?> previousFrom = sqmFromByAlias.put( aliasToUse, sqmFrom );
+
+			if ( previousFrom != null ) {
+				throw new AliasCollisionException(
+						String.format(
+								Locale.ENGLISH,
+								"Alias [%s] used for multiple from-clause elements : %s, %s",
+								alias,
+								previousFrom,
+								sqmFrom
+						)
+				);
+			}
+		}
+	}
+
 	@Override
 	public <E> void replace(SqmEntityJoin<E> sqmJoin, SqmRoot<E> sqmRoot) {
 		final String alias = sqmJoin.getExplicitAlias();

hibernate-core/src/main/java/org/hibernate/query/hql/spi/SqmPathRegistry.java

@@ -36,6 +36,13 @@ public interface SqmPathRegistry {
 	 */
 	void register(SqmPath<?> sqmPath);
 
+	/**
+	 * Register an SqmFrom by alias only.
+	 * Effectively, this makes the from node only resolvable via the alias,
+	 * which means that the from node is ignored in {@link #findFromExposing(String)}.
+	 */
+	void registerByAliasOnly(SqmFrom<?, ?> sqmFrom);
+
 	/**
 	 * Used with {@linkplain JpaCompliance#isJpaQueryComplianceEnabled() JPA compliance}
 	 * to treat secondary query roots as cross-joins.  Here we will replace the {@code sqmRoot}

hibernate-core/src/main/java/org/hibernate/query/sqm/NodeBuilder.java

@@ -32,6 +32,7 @@ import org.hibernate.query.criteria.JpaPredicate;
 import org.hibernate.query.criteria.JpaSearchedCase;
 import org.hibernate.query.criteria.JpaSelection;
 import org.hibernate.query.criteria.JpaSimpleCase;
+import org.hibernate.query.criteria.JpaValues;
 import org.hibernate.query.criteria.JpaWindow;
 import org.hibernate.query.spi.QueryEngine;
 import org.hibernate.query.sqm.tree.delete.SqmDeleteStatement;
@@ -48,6 +49,7 @@ import org.hibernate.query.sqm.tree.expression.SqmTuple;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
+import org.hibernate.query.sqm.tree.insert.SqmValues;
 import org.hibernate.query.sqm.tree.predicate.SqmInPredicate;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.query.sqm.tree.select.SqmSelectStatement;
@@ -522,6 +524,12 @@ public interface NodeBuilder extends HibernateCriteriaBuilder {
 	@Override
 	<T> SqmInsertSelectStatement<T> createCriteriaInsertSelect(Class<T> targetEntity);
 
+	@Override
+	SqmValues values(Expression<?>... expressions);
+
+	@Override
+	SqmValues values(List<? extends Expression<?>> expressions);
+
 	@Override
 	<N extends Number> SqmExpression<N> abs(Expression<N> x);
 
@@ -775,9 +783,6 @@ public interface NodeBuilder extends HibernateCriteriaBuilder {
 	@Override
 	<K, L extends List<?>> SqmExpression<Set<K>> indexes(L list);
 
-	@Override
-	<V, C extends Collection<V>> SqmExpression<Collection<V>> values(C collection);
-
 	@Override
 	<V, M extends Map<?, V>> Expression<Collection<V>> values(M map);
 

hibernate-core/src/main/java/org/hibernate/query/sqm/SemanticQueryWalker.java

@@ -87,6 +87,7 @@ import org.hibernate.query.sqm.tree.from.SqmDerivedJoin;
 import org.hibernate.query.sqm.tree.from.SqmEntityJoin;
 import org.hibernate.query.sqm.tree.from.SqmFromClause;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
+import org.hibernate.query.sqm.tree.insert.SqmConflictClause;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
 import org.hibernate.query.sqm.tree.insert.SqmValues;
@@ -136,6 +137,8 @@ public interface SemanticQueryWalker<T> {
 
 	T visitInsertValuesStatement(SqmInsertValuesStatement<?> statement);
 
+	T visitConflictClause(SqmConflictClause<?> sqmConflictClause);
+
 	T visitDeleteStatement(SqmDeleteStatement<?> statement);
 
 	T visitSelectStatement(SqmSelectStatement<?> statement);

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/QuerySqmImpl.java

@@ -827,7 +827,7 @@ public class QuerySqmImpl<R>
 			final NonSelectQueryPlan[] planParts = new NonSelectQueryPlan[valuesList.size()];
 			for ( int i = 0; i < valuesList.size(); i++ ) {
 				final SqmInsertValuesStatement<?> subInsert = insertValues.copyWithoutValues( SqmCopyContext.simpleContext() );
-				subInsert.getValuesList().add( valuesList.get( i ) );
+				subInsert.values( valuesList );
 				planParts[i] = new SimpleInsertQueryPlan( subInsert, domainParameterXref );
 			}
 

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmCriteriaNodeBuilder.java

@@ -131,6 +131,7 @@ import org.hibernate.query.sqm.tree.expression.ValueBindJpaCriteriaParameter;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
+import org.hibernate.query.sqm.tree.insert.SqmValues;
 import org.hibernate.query.sqm.tree.predicate.SqmBetweenPredicate;
 import org.hibernate.query.sqm.tree.predicate.SqmBooleanExpressionPredicate;
 import org.hibernate.query.sqm.tree.predicate.SqmComparisonPredicate;
@@ -353,6 +354,17 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext,
 		return new SqmInsertSelectStatement<>( targetEntity, this );
 	}
 
+	@Override
+	public SqmValues values(Expression<?>... expressions) {
+		return values( Arrays.asList( expressions ) );
+	}
+
+	@Override
+	public SqmValues values(List<? extends Expression<?>> expressions) {
+		//noinspection unchecked
+		return new SqmValues( (List<SqmExpression<?>>) expressions );
+	}
+
 	@Override
 	public <T> JpaCriteriaQuery<T> union(boolean all, CriteriaQuery<? extends T> query1, CriteriaQuery<?>... queries) {
 		return setOperation( all ? SetOperator.UNION_ALL : SetOperator.UNION, query1, queries );
@@ -1904,14 +1916,9 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext,
 //			|| is a literal enum mapped to a PostgreSQL named 'enum' type
 	}
 
-	@Override
-	public <V, C extends Collection<V>> SqmExpression<Collection<V>> values(C collection) {
-		throw new UnsupportedOperationException();
-	}
-
 	@Override
 	public <V, M extends Map<?, V>> Expression<Collection<V>> values(M map) {
-		throw new UnsupportedOperationException();
+		return value( map.values() );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java

@@ -78,6 +78,8 @@ import org.hibernate.query.sqm.tree.from.SqmFrom;
 import org.hibernate.query.sqm.tree.from.SqmFromClause;
 import org.hibernate.query.sqm.tree.from.SqmQualifiedJoin;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
+import org.hibernate.query.sqm.tree.insert.SqmConflictClause;
+import org.hibernate.query.sqm.tree.insert.SqmConflictUpdateAction;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
 import org.hibernate.query.sqm.tree.insert.SqmValues;
@@ -330,6 +332,12 @@ public class SqmTreePrinter implements SemanticQueryWalker<Object> {
 								"into",
 								() -> statement.getInsertionTargetPaths().forEach( sqmPath -> sqmPath.accept( this ) )
 						);
+						if ( statement.getConflictClause() != null ) {
+							processStanza(
+									"on conflict",
+									() -> statement.getConflictClause().accept( this )
+							);
+						}
 					}
 			);
 		}
@@ -337,6 +345,29 @@ public class SqmTreePrinter implements SemanticQueryWalker<Object> {
 		return null;
 	}
 
+	@Override
+	public Object visitConflictClause(SqmConflictClause<?> sqmConflictClause) {
+		if ( sqmConflictClause.getConstraintName() != null ) {
+			logWithIndentation( "[constraintName = %s]", sqmConflictClause.getConstraintName() );
+		}
+		else {
+			processStanza(
+					"constraint attributes",
+					() -> sqmConflictClause.getConstraintPaths().forEach( sqmPath -> sqmPath.accept( this ) )
+			);
+		}
+		final SqmConflictUpdateAction<?> updateAction = sqmConflictClause.getConflictAction();
+		if ( updateAction == null ) {
+			logWithIndentation( "do nothing" );
+		}
+		else {
+			logWithIndentation( "do update " );
+			visitSetClause( updateAction.getSetClause() );
+			visitWhereClause( updateAction.getWhereClause() );
+		}
+		return null;
+	}
+
 	@Override
 	public Object visitSelectStatement(SqmSelectStatement<?> statement) {
 		if ( DEBUG_ENABLED ) {

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/MultiTableSqmMutationConverter.java

@@ -6,62 +6,37 @@
  */
 package org.hibernate.query.sqm.mutation.internal;
 
-import java.util.List;
-import java.util.function.BiConsumer;
-import java.util.function.Consumer;
-import java.util.function.Function;
-
 import org.hibernate.engine.spi.LoadQueryInfluencers;
 import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.metamodel.mapping.EntityMappingType;
-import org.hibernate.metamodel.mapping.MappingModelExpressible;
-import org.hibernate.persister.entity.EntityPersister;
 import org.hibernate.query.spi.QueryOptions;
 import org.hibernate.query.spi.QueryParameterBindings;
 import org.hibernate.query.sqm.internal.DomainParameterXref;
 import org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter;
 import org.hibernate.query.sqm.sql.internal.SqlAstProcessingStateImpl;
 import org.hibernate.query.sqm.tree.SqmStatement;
-import org.hibernate.query.sqm.tree.expression.SqmParameter;
 import org.hibernate.query.sqm.tree.from.SqmRoot;
-import org.hibernate.query.sqm.tree.insert.SqmInsertStatement;
 import org.hibernate.query.sqm.tree.predicate.SqmWhereClause;
-import org.hibernate.query.sqm.tree.update.SqmSetClause;
-import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.spi.SqlAstCreationContext;
 import org.hibernate.sql.ast.spi.SqlAstHelper;
 import org.hibernate.sql.ast.spi.SqlAstProcessingState;
-import org.hibernate.sql.ast.spi.SqlExpressionResolver;
 import org.hibernate.sql.ast.tree.Statement;
-import org.hibernate.sql.ast.tree.expression.ColumnReference;
-import org.hibernate.sql.ast.tree.expression.Expression;
-import org.hibernate.sql.ast.tree.expression.JdbcParameter;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.predicate.Predicate;
-import org.hibernate.sql.ast.tree.update.Assignable;
-import org.hibernate.sql.ast.tree.update.Assignment;
 
 /**
  * Specialized BaseSqmToSqlAstConverter implementation used during conversion
  * of an SQM mutation query tree representing into the various SQL AST trees
  * needed to perform that operation.
  *
- * @see #visitSetClause(SqmSetClause, Consumer, SqmParameterResolutionConsumer)
- * @see #visitWhereClause(SqmWhereClause, Consumer, SqmParameterResolutionConsumer)
- *
  * @author Steve Ebersole
  */
 public class MultiTableSqmMutationConverter extends BaseSqmToSqlAstConverter<Statement> {
-	public interface SqmParameterResolutionConsumer {
-		void accept(SqmParameter<?> sqmParam, MappingModelExpressible<?> mappingType, List<JdbcParameter> jdbcParameters);
-	}
 
 	private final EntityMappingType mutatingEntityDescriptor;
 	private final TableGroup mutatingTableGroup;
 	private Predicate discriminatorPredicate;
 
-	private SqmParameterResolutionConsumer parameterResolutionConsumer;
-
 	public MultiTableSqmMutationConverter(
 			EntityMappingType mutatingEntityDescriptor,
 			SqmStatement<?> statement,
@@ -119,6 +94,7 @@ public class MultiTableSqmMutationConverter extends BaseSqmToSqlAstConverter<Sta
 				sourceAlias,
 				null,
 				() -> (predicate) -> {
+					assert this.discriminatorPredicate == null;
 					this.discriminatorPredicate = predicate;
 				},
 				this
@@ -146,98 +122,9 @@ public class MultiTableSqmMutationConverter extends BaseSqmToSqlAstConverter<Sta
 		return super.getProcessingStateStack();
 	}
 
-	/**
-	 * Specialized hook to visit the assignments defined by the update SQM.
-	 */
-	public void visitSetClause(
-			SqmSetClause setClause,
-			Consumer<Assignment> assignmentConsumer,
-			SqmParameterResolutionConsumer parameterResolutionConsumer) {
-		this.parameterResolutionConsumer = parameterResolutionConsumer;
-
-		final List<Assignment> assignments = super.visitSetClause( setClause );
-		for ( Assignment assignment : assignments ) {
-			assignmentConsumer.accept( assignment );
-		}
-	}
-
-	public List<Assignment> visitSetClause(SqmSetClause setClause) {
-		throw new UnsupportedOperationException();
-	}
-
-	public Predicate visitWhereClause(
-			SqmWhereClause sqmWhereClause,
-			Consumer<ColumnReference> restrictionColumnReferenceConsumer,
-			SqmParameterResolutionConsumer parameterResolutionConsumer) {
-		this.parameterResolutionConsumer = parameterResolutionConsumer;
-
-		if ( sqmWhereClause == null || sqmWhereClause.getPredicate() == null ) {
-			return discriminatorPredicate;
-		}
-
-		final SqlAstProcessingState rootProcessingState = getCurrentProcessingState();
-		final SqlAstProcessingStateImpl restrictionProcessingState = new SqlAstProcessingStateImpl(
-				rootProcessingState,
-				this,
-				getCurrentClauseStack()::getCurrent
-		) {
-			@Override
-			public SqlExpressionResolver getSqlExpressionResolver() {
-				return this;
-			}
-
-			@Override
-			public Expression resolveSqlExpression(
-					ColumnReferenceKey key, Function<SqlAstProcessingState, Expression> creator) {
-				final Expression expression = rootProcessingState.getSqlExpressionResolver().resolveSqlExpression(
-						key,
-						creator
-				);
-				if ( expression instanceof ColumnReference ) {
-					restrictionColumnReferenceConsumer.accept( (ColumnReference) expression );
-				}
-				return expression;
-			}
-		};
-
-		pushProcessingState( restrictionProcessingState, getFromClauseIndex() );
-		try {
-			getCurrentClauseStack().push( Clause.WHERE );
-			return SqlAstHelper.combinePredicates(
-					(Predicate) sqmWhereClause.getPredicate().accept( this ),
-					discriminatorPredicate
-			);
-		}
-		finally {
-			getCurrentClauseStack().pop();
-			popProcessingStateStack();
-			this.parameterResolutionConsumer = null;
-		}
-	}
-
 	@Override
 	public Predicate visitWhereClause(SqmWhereClause whereClause) {
-		return (Predicate) super.visitWhereClause( whereClause );
-	}
-
-	@Override
-	protected Expression consumeSqmParameter(
-			SqmParameter<?> sqmParameter,
-			MappingModelExpressible<?> valueMapping,
-			BiConsumer<Integer, JdbcParameter> jdbcParameterConsumer) {
-		assert parameterResolutionConsumer != null;
-
-		final Expression expression = super.consumeSqmParameter( sqmParameter, valueMapping, jdbcParameterConsumer );
-
-		final List<List<JdbcParameter>> jdbcParameters = getJdbcParamsBySqmParam().get( sqmParameter );
-		final MappingModelExpressible<?> mappingType = getSqmParameterMappingModelExpressibleResolutions().get( sqmParameter );
-		parameterResolutionConsumer.accept(
-				sqmParameter,
-				mappingType,
-				jdbcParameters.get( jdbcParameters.size() - 1 )
-		);
-
-		return expression;
+		return SqlAstHelper.combinePredicates( super.visitWhereClause( whereClause ), discriminatorPredicate );
 	}
 
 }

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/cte/AbstractCteMutationHandler.java

@@ -28,6 +28,7 @@ import org.hibernate.query.sqm.internal.SqmUtil;
 import org.hibernate.query.sqm.mutation.internal.MatchingIdSelectionHelper;
 import org.hibernate.query.sqm.mutation.internal.MultiTableSqmMutationConverter;
 import org.hibernate.query.sqm.mutation.spi.AbstractMutationHandler;
+import org.hibernate.query.sqm.spi.SqmParameterMappingModelResolutionAccess;
 import org.hibernate.query.sqm.tree.SqmDeleteOrUpdateStatement;
 import org.hibernate.query.sqm.tree.expression.SqmExpression;
 import org.hibernate.query.sqm.tree.expression.SqmParameter;
@@ -131,14 +132,7 @@ public abstract class AbstractCteMutationHandler extends AbstractMutationHandler
 			parameterResolutions = new IdentityHashMap<>();
 		}
 
-		//noinspection rawtypes
-		final Map<SqmParameter, MappingModelExpressible> paramTypeResolutions = new LinkedHashMap<>();
-
-		final Predicate restriction = sqmConverter.visitWhereClause(
-				sqmMutationStatement.getWhereClause(),
-				columnReference -> {},
-				(sqmParam, mappingType, jdbcParameters) -> paramTypeResolutions.put( sqmParam, mappingType )
-		);
+		final Predicate restriction = sqmConverter.visitWhereClause( sqmMutationStatement.getWhereClause() );
 		sqmConverter.pruneTableGroupJoins();
 
 		final CteStatement idSelectCte = new CteStatement(
@@ -193,7 +187,12 @@ public abstract class AbstractCteMutationHandler extends AbstractMutationHandler
 				SqmUtil.generateJdbcParamsXref( domainParameterXref, sqmConverter ),
 				factory.getRuntimeMetamodels().getMappingMetamodel(),
 				navigablePath -> sqmConverter.getMutatingTableGroup(),
-				paramTypeResolutions::get,
+				new SqmParameterMappingModelResolutionAccess() {
+					@Override @SuppressWarnings("unchecked")
+					public <T> MappingModelExpressible<T> getResolvedMappingModelType(SqmParameter<T> parameter) {
+						return (MappingModelExpressible<T>) sqmConverter.getSqmParameterMappingModelExpressibleResolutions().get( parameter );
+					}
+				},
 				executionContext.getSession()
 		);
 		final LockOptions lockOptions = executionContext.getQueryOptions().getLockOptions();

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/cte/CteInsertHandler.java

@@ -8,14 +8,15 @@ package org.hibernate.query.sqm.mutation.internal.cte;
 
 import java.util.AbstractMap;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.function.BiConsumer;
+import java.util.stream.Collectors;
 
 import org.hibernate.boot.model.naming.Identifier;
 import org.hibernate.dialect.Dialect;
-import org.hibernate.dialect.temptable.TemporaryTable;
 import org.hibernate.engine.jdbc.spi.JdbcServices;
 import org.hibernate.engine.spi.SessionFactoryImplementor;
 import org.hibernate.id.BulkInsertionCapableIdentifierGenerator;
@@ -37,6 +38,7 @@ import org.hibernate.query.results.TableGroupImpl;
 import org.hibernate.query.spi.DomainQueryExecutionContext;
 import org.hibernate.query.sqm.BinaryArithmeticOperator;
 import org.hibernate.query.sqm.ComparisonOperator;
+import org.hibernate.query.sqm.SetOperator;
 import org.hibernate.query.sqm.internal.DomainParameterXref;
 import org.hibernate.query.sqm.internal.SqmJdbcExecutionContextAdapter;
 import org.hibernate.query.sqm.internal.SqmUtil;
@@ -46,9 +48,11 @@ import org.hibernate.query.sqm.mutation.internal.SqmInsertStrategyHelper;
 import org.hibernate.query.sqm.spi.SqmParameterMappingModelResolutionAccess;
 import org.hibernate.query.sqm.sql.BaseSqmToSqlAstConverter;
 import org.hibernate.query.sqm.sql.internal.SqmPathInterpretation;
+import org.hibernate.query.sqm.tree.domain.SqmPath;
 import org.hibernate.query.sqm.tree.expression.SqmExpression;
 import org.hibernate.query.sqm.tree.expression.SqmParameter;
 import org.hibernate.query.sqm.tree.expression.SqmStar;
+import org.hibernate.query.sqm.tree.insert.SqmConflictClause;
 import org.hibernate.query.sqm.tree.insert.SqmInsertSelectStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertStatement;
 import org.hibernate.query.sqm.tree.insert.SqmInsertValuesStatement;
@@ -70,21 +74,32 @@ import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.sql.ast.tree.expression.JdbcParameter;
 import org.hibernate.sql.ast.tree.expression.QueryLiteral;
 import org.hibernate.sql.ast.tree.expression.SelfRenderingSqlFragmentExpression;
+import org.hibernate.sql.ast.tree.expression.SqlTuple;
+import org.hibernate.sql.ast.tree.expression.Star;
+import org.hibernate.sql.ast.tree.from.DerivedTableReference;
+import org.hibernate.sql.ast.tree.from.FromClause;
 import org.hibernate.sql.ast.tree.from.NamedTableReference;
+import org.hibernate.sql.ast.tree.from.QueryPartTableGroup;
+import org.hibernate.sql.ast.tree.from.StandardTableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroup;
 import org.hibernate.sql.ast.tree.from.TableGroupJoin;
 import org.hibernate.sql.ast.tree.from.TableReference;
 import org.hibernate.sql.ast.tree.from.TableReferenceJoin;
 import org.hibernate.sql.ast.tree.from.UnionTableReference;
 import org.hibernate.sql.ast.tree.from.ValuesTableGroup;
+import org.hibernate.sql.ast.tree.insert.ConflictClause;
 import org.hibernate.sql.ast.tree.insert.InsertSelectStatement;
 import org.hibernate.sql.ast.tree.insert.Values;
 import org.hibernate.sql.ast.tree.predicate.ComparisonPredicate;
+import org.hibernate.sql.ast.tree.predicate.ExistsPredicate;
+import org.hibernate.sql.ast.tree.predicate.Predicate;
+import org.hibernate.sql.ast.tree.select.QueryGroup;
 import org.hibernate.sql.ast.tree.select.QueryPart;
 import org.hibernate.sql.ast.tree.select.QuerySpec;
 import org.hibernate.sql.ast.tree.select.SelectStatement;
 import org.hibernate.sql.ast.tree.select.SortSpecification;
 import org.hibernate.sql.ast.tree.update.Assignment;
+import org.hibernate.sql.ast.tree.update.UpdateStatement;
 import org.hibernate.sql.exec.spi.JdbcOperationQuerySelect;
 import org.hibernate.sql.exec.spi.JdbcParameterBindings;
 import org.hibernate.sql.results.graph.DomainResult;
@@ -92,6 +107,7 @@ import org.hibernate.sql.results.graph.basic.BasicResult;
 import org.hibernate.sql.results.internal.SqlSelectionImpl;
 import org.hibernate.sql.results.spi.ListResultsConsumer;
 import org.hibernate.generator.Generator;
+import org.hibernate.type.BasicType;
 import org.hibernate.type.spi.TypeConfiguration;
 
 /**
@@ -191,12 +207,6 @@ public class CteInsertHandler implements InsertHandler {
 		final int size = sqmStatement.getInsertionTargetPaths().size();
 		final List<Map.Entry<List<CteColumn>, Assignment>> targetPathColumns = new ArrayList<>( size );
 		final List<CteColumn> targetPathCteColumns = new ArrayList<>( size );
-		final NamedTableReference entityTableReference = new NamedTableReference(
-				cteTable.getTableExpression(),
-				TemporaryTable.DEFAULT_ALIAS,
-				true
-		);
-		final InsertSelectStatement insertStatement = new InsertSelectStatement( entityTableReference );
 
 		final BaseSqmToSqlAstConverter.AdditionalInsertValues additionalInsertValues = sqmConverter.visitInsertionTargetPaths(
 				(assignable, columnReferences) -> {
@@ -211,7 +221,6 @@ public class CteInsertHandler implements InsertHandler {
 					final int end = offset + pathInterpretation.getExpressionType().getJdbcTypeCount();
 					// Find a matching cte table column and set that at the current index
 					final List<CteColumn> columns = cteTable.getCteColumns().subList( offset, end );
-					insertStatement.addTargetColumnReferences( columnReferences );
 					targetPathCteColumns.addAll( columns );
 					targetPathColumns.add(
 							new AbstractMap.SimpleEntry<>(
@@ -245,17 +254,6 @@ public class CteInsertHandler implements InsertHandler {
 						if ( additionalInsertValues.applySelections( querySpec, sessionFactory ) ) {
 							final CteColumn rowNumberColumn = cteTable.getCteColumns()
 									.get( cteTable.getCteColumns().size() - 1 );
-							final ColumnReference columnReference = new ColumnReference(
-									(String) null,
-									rowNumberColumn.getColumnExpression(),
-									false,
-									null,
-									rowNumberColumn.getJdbcMapping()
-							);
-							insertStatement.getTargetColumns().set(
-									insertStatement.getTargetColumns().size() - 1,
-									columnReference
-							);
 							targetPathCteColumns.set(
 									targetPathCteColumns.size() - 1,
 									rowNumberColumn
@@ -326,14 +324,6 @@ public class CteInsertHandler implements InsertHandler {
 			// Add the row number to the assignments
 			final CteColumn rowNumberColumn = cteTable.getCteColumns()
 					.get( cteTable.getCteColumns().size() - 1 );
-			final ColumnReference columnReference = new ColumnReference(
-					(String) null,
-					rowNumberColumn.getColumnExpression(),
-					false,
-					null,
-					rowNumberColumn.getJdbcMapping()
-			);
-			insertStatement.getTargetColumns().add( columnReference );
 			targetPathCteColumns.add( rowNumberColumn );
 		}
 
@@ -743,11 +733,13 @@ public class CteInsertHandler implements InsertHandler {
 			throw new IllegalStateException( "There must be at least a single root table assignment" );
 		}
 
+		final ConflictClause conflictClause = sqmConverter.visitConflictClause( sqmStatement.getConflictClause() );
+
 		final int tableSpan = persister.getTableSpan();
 		final String[] rootKeyColumns = persister.getKeyColumns( 0 );
 		final List<CteColumn> keyCteColumns = queryCte.getCteTable().getCteColumns().subList( 0, rootKeyColumns.length );
-		for ( int i = 0; i < tableSpan; i++ ) {
-			final String tableExpression = persister.getTableName( i );
+		for ( int tableIndex = 0; tableIndex < tableSpan; tableIndex++ ) {
+			final String tableExpression = persister.getTableName( tableIndex );
 			final TableReference updatingTableReference = updatingTableGroup.getTableReference(
 					updatingTableGroup.getNavigablePath(),
 					tableExpression,
@@ -758,7 +750,7 @@ public class CteInsertHandler implements InsertHandler {
 					updatingTableReference,
 					tableExpression
 			);
-			final String[] keyColumns = persister.getKeyColumns( i );
+			final String[] keyColumns = persister.getKeyColumns( tableIndex );
 			final List<ColumnReference> returningColumnReferences = new ArrayList<>(
 					keyColumns.length + ( assignmentList == null ? 0 : assignmentList.size() )
 			);
@@ -766,7 +758,7 @@ public class CteInsertHandler implements InsertHandler {
 			final QuerySpec insertSelectSpec = new QuerySpec( true );
 			CteStatement finalCteStatement = null;
 			final CteTable dmlResultCte;
-			if ( i == 0 && !assignsId && identifierGenerator.generatedOnExecution() ) {
+			if ( tableIndex == 0 && !assignsId && identifierGenerator.generatedOnExecution() ) {
 				// Special handling for identity generation
 				final String cteTableName = getCteTableName( tableExpression, "base_" );
 				if ( statement.getCteStatement( cteTableName ) != null ) {
@@ -999,11 +991,57 @@ public class CteInsertHandler implements InsertHandler {
 				}
 			}
 			dmlStatement.setSourceSelectStatement( insertSelectSpec );
+			if ( conflictClause != null ) {
+				if ( conflictClause.isDoNothing() && conflictClause.getConstraintColumnNames().isEmpty() ) {
+					// Conflict clauses that use a constraint name and do nothing can just use the conflict clause as it is
+					handleConflictClause( dmlResultCte, dmlStatement, queryCte, tableIndex, conflictClause, statement );
+				}
+				else {
+					final List<Assignment> compatibleAssignments = getCompatibleAssignments( dmlStatement, conflictClause );
+					if ( isIdentifierConflictClause( sqmStatement ) ) {
+						// If the identifier is used in the SqmInsert, use the key columns of the respective table
+						handleConflictClause(
+								dmlResultCte,
+								dmlStatement,
+								queryCte,
+								tableIndex,
+								new ConflictClause(
+										conflictClause.getConstraintName(),
+										Arrays.asList( keyColumns ),
+										compatibleAssignments,
+										compatibleAssignments.isEmpty() ? null : conflictClause.getPredicate()
+								),
+								statement
+						);
+					}
+					else if ( targetColumnsContainAllConstraintColumns( dmlStatement, conflictClause ) ) {
+						// Also apply the conflict clause if the insert target columns contain the constraint columns
+						handleConflictClause(
+								dmlResultCte,
+								dmlStatement,
+								queryCte,
+								tableIndex,
+								new ConflictClause(
+										conflictClause.getConstraintName(),
+										conflictClause.getConstraintColumnNames(),
+										compatibleAssignments,
+										compatibleAssignments.isEmpty() ? null : conflictClause.getPredicate()
+								),
+								statement
+						);
+					}
+					else {
 						statement.addCteStatement( new CteStatement( dmlResultCte, dmlStatement ) );
+					}
+				}
+			}
+			else {
+				statement.addCteStatement( new CteStatement( dmlResultCte, dmlStatement ) );
+			}
 			if ( finalCteStatement != null ) {
 				statement.addCteStatement( finalCteStatement );
 			}
-			if ( i == 0 && !assignsId && identifierGenerator.generatedOnExecution() ) {
+			if ( tableIndex == 0 && !assignsId && identifierGenerator.generatedOnExecution() ) {
 				// Special handling for identity generation
 				statement.addCteStatement( queryCte );
 			}
@@ -1011,6 +1049,319 @@ public class CteInsertHandler implements InsertHandler {
 		return getCteTableName( rootTableName );
 	}
 
+	private void handleConflictClause(
+			CteTable dmlResultCte,
+			InsertSelectStatement insertStatement,
+			CteStatement queryCte,
+			int tableIndex,
+			ConflictClause conflictClause,
+			CteContainer statement) {
+		if ( sessionFactory.getJdbcServices().getDialect().supportsConflictClauseForInsertCTE() ) {
+			insertStatement.setConflictClause( conflictClause );
+			statement.addCteStatement( new CteStatement( dmlResultCte, insertStatement ) );
+		}
+		else {
+			// Build an exists subquery clause to only insert if no row with a matching constraint column value exists i.e.
+			// insert into target (c1, c2)
+			// select e.c1, e.c2 from HTE_target e
+			// where not exists (select 1 from target excluded where e.c1=excluded.c1 and e.c2=excluded.c2)
+			final BasicType<Boolean> booleanType = sessionFactory.getNodeBuilder().getBooleanType();
+			final List<String> constraintColumnNames = conflictClause.getConstraintColumnNames();
+			final QuerySpec insertQuerySpec = (QuerySpec) insertStatement.getSourceSelectStatement();
+			final QuerySpec subquery = new QuerySpec( false, 1 );
+			// This is the table group we use in the subquery to check no row for the given constraint columns exists.
+			// We name it "excluded" because the predicates we build for this check are reused for the
+			// check in the update statement below.
+			// "excluded" is our well known name to refer to data that was not inserted
+			final TableGroup tableGroup = new StandardTableGroup(
+					false,
+					new NavigablePath( "excluded" ),
+					entityDescriptor,
+					null,
+					new NamedTableReference(
+							insertStatement.getTargetTable().getTableExpression(),
+							"excluded"
+					),
+					null,
+					sessionFactory
+			);
+			subquery.getSelectClause().addSqlSelection(
+					new SqlSelectionImpl( new QueryLiteral<>( 1, sessionFactory.getNodeBuilder().getIntegerType() ) )
+			);
+			subquery.getFromClause().addRoot( tableGroup );
+			List<String> columnsToMatch;
+			if ( constraintColumnNames.isEmpty() ) {
+				// Assume the primary key columns
+				final AbstractEntityPersister aep = (AbstractEntityPersister) entityDescriptor;
+				Predicate predicate = buildColumnMatchPredicate(
+						columnsToMatch = Arrays.asList( aep.getKeyColumns( tableIndex ) ),
+						insertStatement,
+						false,
+						true
+				);
+				if ( predicate == null ) {
+					throw new IllegalArgumentException( "Couldn't infer conflict constraint columns" );
+				}
+				subquery.applyPredicate( predicate );
+			}
+			else {
+				columnsToMatch = constraintColumnNames;
+				subquery.applyPredicate( buildColumnMatchPredicate( constraintColumnNames, insertStatement, true, true ) );
+			}
+
+			insertQuerySpec.applyPredicate( new ExistsPredicate( subquery, true, booleanType ) );
+
+			// Emulate the conflict do update clause by creating a separate update CTEs
+			if ( conflictClause.isDoUpdate() ) {
+				final TableGroup temporaryTableGroup = insertQuerySpec.getFromClause().getRoots().get( 0 );
+				final QuerySpec renamingSubquery = new QuerySpec( false, 1 );
+				final List<String> columnNames = buildCteRenaming(
+						renamingSubquery,
+						temporaryTableGroup,
+						queryCte
+				);
+				renamingSubquery.getFromClause().addRoot( temporaryTableGroup );
+				final QueryPartTableGroup excludedTableGroup = new QueryPartTableGroup(
+						new NavigablePath( "excluded" ),
+						null,
+						new SelectStatement( renamingSubquery ),
+						"excluded",
+						columnNames,
+						false,
+						false,
+						sessionFactory
+				);
+
+				final UpdateStatement updateStatement;
+				if ( sessionFactory.getJdbcServices().getDialect().supportsFromClauseInUpdate() ) {
+					final FromClause fromClause = new FromClause( 1 );
+					final TableGroup updateTableGroup = new StandardTableGroup(
+							false,
+							new NavigablePath( "updated" ),
+							entityDescriptor,
+							null,
+							insertStatement.getTargetTable(),
+							null,
+							sessionFactory
+					);
+					fromClause.addRoot( updateTableGroup );
+					updateStatement = new UpdateStatement(
+							insertStatement.getTargetTable(),
+							fromClause,
+							conflictClause.getAssignments(),
+							conflictClause.getPredicate(),
+							insertStatement.getReturningColumns()
+					);
+					updateTableGroup.addTableGroupJoin(
+							new TableGroupJoin(
+									excludedTableGroup.getNavigablePath(),
+									SqlAstJoinType.INNER,
+									excludedTableGroup,
+									buildColumnMatchPredicate(
+											columnsToMatch,
+											insertStatement,
+											true,
+											false
+									)
+							)
+					);
+				}
+				else {
+					final List<Assignment> assignments = conflictClause.getAssignments();
+					final List<ColumnReference> assignmentColumns = new ArrayList<>( assignments.size() );
+					final QuerySpec updateSubquery = new QuerySpec( false, 1 );
+					for ( Assignment assignment : assignments ) {
+						assignmentColumns.add( (ColumnReference) assignment.getAssignable() );
+						updateSubquery.getSelectClause().addSqlSelection(
+								new SqlSelectionImpl( assignment.getAssignedValue() )
+						);
+					}
+					updateSubquery.getFromClause().addRoot( excludedTableGroup );
+					updateSubquery.applyPredicate( buildColumnMatchPredicate(
+							columnsToMatch,
+							insertStatement,
+							true,
+							false
+					) );
+					final QuerySpec matchCteSubquery = new QuerySpec( false, 1 );
+					matchCteSubquery.getSelectClause().addSqlSelection(
+							new SqlSelectionImpl( new QueryLiteral<>(
+									1,
+									sessionFactory.getNodeBuilder().getIntegerType()
+							) )
+					);
+					matchCteSubquery.getFromClause().addRoot( updateSubquery.getFromClause().getRoots().get( 0 ) );
+					matchCteSubquery.applyPredicate( updateSubquery.getWhereClauseRestrictions() );
+					updateStatement = new UpdateStatement(
+							insertStatement.getTargetTable(),
+							List.of( new Assignment(
+									new SqlTuple( assignmentColumns, null ),
+									new SelectStatement( updateSubquery )
+							) ),
+							Predicate.combinePredicates(
+									new ExistsPredicate( matchCteSubquery, false, booleanType ),
+									conflictClause.getPredicate()
+							),
+							insertStatement.getReturningColumns()
+					);
+				}
+
+				final CteTable updateCte = dmlResultCte.withName( dmlResultCte.getTableExpression() + "_upd" );
+				statement.addCteStatement( new CteStatement( updateCte, updateStatement ) );
+
+				final CteTable insertCte = dmlResultCte.withName( dmlResultCte.getTableExpression() + "_ins" );
+				statement.addCteStatement( new CteStatement( insertCte, insertStatement ) );
+
+				// Union the update and inserted ids together to be able to determine the effective update count
+				final List<QueryPart> queryParts = new ArrayList<>( 2 );
+				final QuerySpec dmlCombinationQ1 = new QuerySpec( false, 1 );
+				final QuerySpec dmlCombinationQ2 = new QuerySpec( false, 1 );
+				dmlCombinationQ1.getSelectClause().addSqlSelection( new SqlSelectionImpl( new Star() ) );
+				dmlCombinationQ2.getSelectClause().addSqlSelection( new SqlSelectionImpl( new Star() ) );
+				dmlCombinationQ1.getFromClause().addRoot( new CteTableGroup( new NamedTableReference( updateCte.getTableExpression(), "t" ) ) );
+				dmlCombinationQ2.getFromClause().addRoot( new CteTableGroup( new NamedTableReference( insertCte.getTableExpression(), "t" ) ) );
+				queryParts.add( dmlCombinationQ1 );
+				queryParts.add( dmlCombinationQ2 );
+				final SelectStatement dmlCombinationStatement = new SelectStatement( new QueryGroup( true, SetOperator.UNION_ALL, queryParts ) );
+				statement.addCteStatement( new CteStatement( dmlResultCte, dmlCombinationStatement ) );
+			}
+			else {
+				statement.addCteStatement( new CteStatement( dmlResultCte, insertStatement ) );
+			}
+		}
+	}
+
+	private List<String> buildCteRenaming(
+			QuerySpec renamingSubquery,
+			TableGroup temporaryTableGroup,
+			CteStatement queryCte) {
+		final List<CteColumn> cteColumns = queryCte.getCteTable().getCteColumns();
+		for ( CteColumn cteColumn : cteColumns ) {
+			renamingSubquery.getSelectClause().addSqlSelection(
+					new SqlSelectionImpl(
+							new ColumnReference(
+									temporaryTableGroup.getPrimaryTableReference(),
+									cteColumn.getColumnExpression(),
+									cteColumn.getJdbcMapping()
+							)
+					)
+			);
+		}
+		final SelectStatement selectStatement = (SelectStatement) queryCte.getCteDefinition();
+		final QuerySpec querySpec = (QuerySpec) selectStatement.getQueryPart();
+		final DerivedTableReference tableReference = (DerivedTableReference) querySpec.getFromClause()
+				.getRoots()
+				.get( 0 )
+				.getPrimaryTableReference();
+		return tableReference.getColumnNames();
+	}
+
+	private Predicate buildColumnMatchPredicate(
+			List<String> constraintColumnNames,
+			InsertSelectStatement dmlStatement,
+			boolean errorIfMissing,
+			boolean compareAgainstSelectItems) {
+		final BasicType<Boolean> booleanType = sessionFactory.getNodeBuilder().getBooleanType();
+		final QuerySpec insertQuerySpec = (QuerySpec) dmlStatement.getSourceSelectStatement();
+		Predicate predicate = null;
+		OUTER: for ( String constraintColumnName : constraintColumnNames ) {
+			final List<ColumnReference> targetColumns = dmlStatement.getTargetColumns();
+			for ( int i = 0; i < targetColumns.size(); i++ ) {
+				final ColumnReference columnReference = targetColumns.get( i );
+				if ( columnReference.getColumnExpression().equals( constraintColumnName ) ) {
+					if ( compareAgainstSelectItems ) {
+						predicate = Predicate.combinePredicates(
+								predicate,
+								new ComparisonPredicate(
+										new ColumnReference(
+												"excluded",
+												columnReference.getColumnExpression(),
+												false,
+												null,
+												columnReference.getJdbcMapping()
+										),
+										ComparisonOperator.EQUAL,
+										insertQuerySpec.getSelectClause()
+												.getSqlSelections()
+												.get( i )
+												.getExpression(),
+										booleanType
+								)
+						);
+					}
+					else {
+						predicate = Predicate.combinePredicates(
+								predicate,
+								new ComparisonPredicate(
+										columnReference,
+										ComparisonOperator.EQUAL,
+										new ColumnReference(
+												"excluded",
+												columnReference.getColumnExpression(),
+												false,
+												null,
+												columnReference.getJdbcMapping()
+										),
+										booleanType
+								)
+						);
+					}
+					continue OUTER;
+				}
+			}
+			if ( errorIfMissing ) {
+				// Should never happen
+				final List<String> targetColumnNames = targetColumns.stream()
+						.map( ColumnReference::getColumnExpression )
+						.collect( Collectors.toList() );
+				throw new IllegalArgumentException( "Couldn't find conflict constraint column [" + constraintColumnName + "] in insert target columns: " + targetColumnNames );
+			}
+			return null;
+		}
+		return predicate;
+	}
+
+	private List<Assignment> getCompatibleAssignments(InsertSelectStatement dmlStatement, ConflictClause conflictClause) {
+		if ( conflictClause.isDoNothing() ) {
+			return Collections.emptyList();
+		}
+		List<Assignment> compatibleAssignments = null;
+		final List<Assignment> assignments = conflictClause.getAssignments();
+		for ( Assignment assignment : assignments ) {
+			for ( ColumnReference targetColumn : dmlStatement.getTargetColumns() ) {
+				if ( targetColumn.equals( assignment.getAssignable() ) ) {
+					if ( compatibleAssignments == null ) {
+						compatibleAssignments = new ArrayList<>( assignments.size() );
+					}
+					compatibleAssignments.add( assignment );
+					break;
+				}
+			}
+		}
+		return compatibleAssignments == null ? Collections.emptyList() : compatibleAssignments;
+	}
+
+	private boolean isIdentifierConflictClause(SqmInsertStatement<?> sqmStatement) {
+		final SqmConflictClause<?> conflictClause = sqmStatement.getConflictClause();
+		assert conflictClause != null;
+		final List<SqmPath<?>> constraintPaths = conflictClause.getConstraintPaths();
+		return constraintPaths.size() == 1
+				&& constraintPaths.get( 0 ).getReferencedPathSource() == sqmStatement.getTarget().getModel().getIdentifierDescriptor();
+	}
+
+	private boolean targetColumnsContainAllConstraintColumns(InsertSelectStatement statement, ConflictClause conflictClause) {
+		OUTER: for ( String constraintColumnName : conflictClause.getConstraintColumnNames() ) {
+			for ( ColumnReference targetColumn : statement.getTargetColumns() ) {
+				if ( targetColumn.getColumnExpression().equals( constraintColumnName ) ) {
+					continue OUTER;
+				}
+			}
+			return false;
+		}
+
+		return true;
+	}
+
 	protected NamedTableReference resolveUnionTableReference(
 			TableReference tableReference,
 			String tableExpression) {

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/cte/CteUpdateHandler.java

@@ -98,15 +98,10 @@ public class CteUpdateHandler extends AbstractCteMutationHandler implements Upda
 		// visit the set-clause using our special converter, collecting
 		// information about the assignments
 		final SqmSetClause setClause = updateStatement.getSetClause();
-		final List<Assignment> assignments = new ArrayList<>( setClause.getAssignments().size() );
-
-		sqmConverter.visitSetClause(
-				setClause,
-				assignments::add,
-				(sqmParam, mappingType, jdbcParameters) -> {
-					parameterResolutions.put( sqmParam, jdbcParameters );
+		final List<Assignment> assignments = sqmConverter.visitSetClause( setClause );
+		for ( Map.Entry<SqmParameter<?>, List<List<JdbcParameter>>> entry : sqmConverter.getJdbcParamsBySqmParam().entrySet() ) {
+			parameterResolutions.put( entry.getKey(), entry.getValue().get( entry.getValue().size() - 1 ) );
 		}
-		);
 		sqmConverter.addVersionedAssignment( assignments::add, updateStatement );
 
 		// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/inline/InPredicateRestrictionProducer.java

@@ -11,16 +11,15 @@ import java.util.List;
 import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-import org.hibernate.engine.spi.SessionFactoryImplementor;
+import org.hibernate.metamodel.mapping.BasicValuedMapping;
 import org.hibernate.metamodel.mapping.BasicValuedModelPart;
 import org.hibernate.metamodel.mapping.ModelPart;
 import org.hibernate.metamodel.mapping.SelectableConsumer;
 import org.hibernate.metamodel.mapping.EntityIdentifierMapping;
 import org.hibernate.metamodel.mapping.EntityMappingType;
-import org.hibernate.metamodel.mapping.JdbcMapping;
 import org.hibernate.sql.ast.tree.expression.ColumnReference;
 import org.hibernate.sql.ast.tree.expression.Expression;
-import org.hibernate.sql.ast.tree.expression.JdbcLiteral;
+import org.hibernate.sql.ast.tree.expression.QueryLiteral;
 import org.hibernate.sql.ast.tree.expression.SqlTuple;
 import org.hibernate.sql.ast.tree.from.TableReference;
 import org.hibernate.sql.ast.tree.predicate.InListPredicate;
@@ -45,19 +44,42 @@ import org.hibernate.sql.exec.spi.ExecutionContext;
  * @author Steve Ebersole
  */
 public class InPredicateRestrictionProducer implements MatchingIdRestrictionProducer {
+
+	@Override
+	public List<Expression> produceIdExpressionList(List<Object> idsAndFks, EntityMappingType entityDescriptor) {
+		final List<Expression> inListExpressions = new ArrayList<>( idsAndFks.size() );
+		final EntityIdentifierMapping identifierMapping = entityDescriptor.getIdentifierMapping();
+		if ( identifierMapping instanceof BasicValuedModelPart ) {
+			final BasicValuedModelPart basicValuedModelPart = (BasicValuedModelPart) identifierMapping;
+			for ( int i = 0; i < idsAndFks.size(); i++ ) {
+				inListExpressions.add( new QueryLiteral<>( idsAndFks.get( i ), basicValuedModelPart ) );
+			}
+		}
+		else {
+			final int jdbcTypeCount = identifierMapping.getJdbcTypeCount();
+			for ( int i = 0; i < idsAndFks.size(); i++ ) {
+				final Object[] id = (Object[]) idsAndFks.get( i );
+				final List<Expression> tupleElements = new ArrayList<>( jdbcTypeCount );
+				inListExpressions.add( new SqlTuple( tupleElements, identifierMapping ) );
+				identifierMapping.forEachJdbcType( (index, jdbcMapping) -> {
+					tupleElements.add( new QueryLiteral<>( id[index], (BasicValuedMapping) jdbcMapping ) );
+				} );
+			}
+		}
+		return inListExpressions;
+	}
+
 	@Override
 	public InListPredicate produceRestriction(
-			List<?> matchingIdValues,
+			List<Expression> matchingIdValueExpressions,
 			EntityMappingType entityDescriptor,
 			int valueIndex,
 			ModelPart valueModelPart,
 			TableReference mutatingTableReference,
 			Supplier<Consumer<SelectableConsumer>> columnsToMatchVisitationSupplier,
 			ExecutionContext executionContext) {
-		assert matchingIdValues != null;
-		assert ! matchingIdValues.isEmpty();
-
-		final SessionFactoryImplementor sessionFactory = executionContext.getSession().getFactory();
+		assert matchingIdValueExpressions != null;
+		assert ! matchingIdValueExpressions.isEmpty();
 
 		final EntityIdentifierMapping identifierMapping = entityDescriptor.getIdentifierMapping();
 		final int idColumnCount = identifierMapping.getJdbcTypeCount();
@@ -76,45 +98,27 @@ public class InPredicateRestrictionProducer implements MatchingIdRestrictionProd
 					null,
 					basicIdMapping.getJdbcMapping()
 			);
-			predicate = new InListPredicate( inFixture );
-
-			matchingIdValues.forEach(
-					matchingId -> predicate.addExpression( new JdbcLiteral<>( matchingId, basicIdMapping.getJdbcMapping() ) )
-			);
+			predicate = new InListPredicate( inFixture, matchingIdValueExpressions );
 		}
 		else {
 			final List<ColumnReference> columnReferences = new ArrayList<>( idColumnCount );
-			final List<JdbcMapping> jdbcMappings = new ArrayList<>( idColumnCount );
-			identifierMapping.forEachSelectable(
-					(columnIndex, selection) -> {
+			final SelectableConsumer selectableConsumer = (columnIndex, selection) -> {
 				columnReferences.add(
 						new ColumnReference(
 								mutatingTableReference,
 								selection
 						)
 				);
-						jdbcMappings.add( selection.getJdbcMapping() );
+			};
+			if ( columnsToMatchVisitationSupplier == null ) {
+				identifierMapping.forEachSelectable( selectableConsumer );
+			}
+			else {
+				columnsToMatchVisitationSupplier.get().accept( selectableConsumer );
 			}
-			);
 
 			final Expression inFixture = new SqlTuple( columnReferences, identifierMapping );
-			predicate = new InListPredicate( inFixture );
-
-			matchingIdValues.forEach(
-					matchingId -> {
-						assert matchingId instanceof Object[];
-						final Object[] matchingIdParts = (Object[]) matchingId;
-
-						final List<JdbcLiteral<?>> tupleParts = new ArrayList<>( idColumnCount );
-						for ( int p = 0; p < matchingIdParts.length; p++ ) {
-							tupleParts.add(
-									new JdbcLiteral<>( matchingIdParts[p],jdbcMappings.get( p ) )
-							);
-						}
-
-						predicate.addExpression( new SqlTuple( tupleParts, identifierMapping ) );
-					}
-			);
+			predicate = new InListPredicate( inFixture, matchingIdValueExpressions );
 		}
 
 		return predicate;