Fix several tests failing on Oracle 11 and some others on older dbs

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

@@ -433,12 +433,47 @@ public class OracleLegacySqlAstTranslator<T extends JdbcOperation> extends Abstr
 				rhs.accept( this );
 				appendSql( ')' );
 				break;
+			case SqlTypes.ARRAY:
+				switch ( operator ) {
+					case DISTINCT_FROM:
+						appendSql( "decode(" );
+						arrayToString( lhs );
+						appendSql( ',' );
+						arrayToString( rhs );
+						appendSql( ",0,1)=1" );
+						break;
+					case NOT_DISTINCT_FROM:
+						appendSql( "decode(" );
+						arrayToString( lhs );
+						appendSql( ',' );
+						arrayToString( rhs );
+						appendSql( ",0,1)=0" );
+						break;
+					default:
+						arrayToString( lhs );
+						appendSql( operator.sqlText() );
+						arrayToString( rhs );
+				}
+				break;
 			default:
 				renderComparisonEmulateDecode( lhs, operator, rhs );
 				break;
 		}
 	}
 
+	private void arrayToString(Expression expression) {
+		appendSql("case when ");
+		expression.accept( this );
+		appendSql(" is not null then (select listagg(column_value||',')");
+		if ( !getDialect().getVersion().isSameOrAfter( 18 ) ) {
+			// The within group clause became optional in 18
+			appendSql(" within group(order by rownum)");
+		}
+		appendSql("||';' from table(");
+		expression.accept( this );
+		appendSql(")) else null end");
+	}
+
 	@Override
 	protected void renderSelectTupleComparison(
 			List<SqlSelection> lhsExpressions,

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

@@ -34,6 +34,7 @@ import java.util.Locale;
 
 import static java.sql.Types.ARRAY;
 import static java.util.Collections.emptySet;
+import static org.hibernate.internal.util.StringHelper.truncate;
 import static org.hibernate.internal.util.collections.ArrayHelper.EMPTY_STRING_ARRAY;
 
 /**
@@ -233,8 +234,10 @@ public class OracleNestedTableJdbcType implements JdbcType {
 		final Dialect dialect = database.getDialect();
 		final BasicPluralJavaType<?> pluralJavaType = (BasicPluralJavaType<?>) javaType;
 		String elementTypeName = getTypeName( pluralJavaType.getElementJavaType(), dialect );
-		return " nested table " + columnName
-				+ " store as \"" + tableName + " " + columnName + " " + elementTypeName + "\"";
+		return " nested table " + columnName + " store as \"" + truncate(
+				tableName + " " + columnName + " " + elementTypeName,
+				dialect.getMaxIdentifierLength()
+		) + "\"";
 	}
 
 	@Override

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

@@ -470,7 +470,12 @@ public class OracleSqlAstTranslator<T extends JdbcOperation> extends SqlAstTrans
 	private void arrayToString(Expression expression) {
 		appendSql("case when ");
 		expression.accept( this );
-		appendSql(" is not null then (select listagg(column_value||',')||';' from table(");
+		appendSql(" is not null then (select listagg(column_value||',')");
+		if ( !getDialect().getVersion().isSameOrAfter( 18 ) ) {
+			// The within group clause became optional in 18
+			appendSql(" within group(order by rownum)");
+		}
+		appendSql("||';' from table(");
 		expression.accept( this );
 		appendSql(")) else null end");
 	}

hibernate-core/src/test/java/org/hibernate/orm/test/bytecode/enhancement/refresh/RefreshAndInheritanceTest.java

@@ -5,7 +5,6 @@ import java.util.List;
 
 import org.hibernate.testing.TestForIssue;
 import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
-import org.hibernate.testing.orm.junit.JiraKey;
 import org.hibernate.testing.orm.junit.Jpa;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -18,7 +17,6 @@ import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
 import jakarta.persistence.ForeignKey;
 import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
 import jakarta.persistence.Inheritance;
 import jakarta.persistence.InheritanceType;
@@ -47,6 +45,7 @@ public class RefreshAndInheritanceTest {
 		scope.inTransaction(
 				entityManager -> {
 					ManufacturerCompany manufacturerCompany = new ManufacturerCompany();
+					manufacturerCompany.setId( 1L );
 					manufacturerCompany.setComputerSystem( new ManufacturerComputerSystem() );
 
 					Person person = new Person();
@@ -85,7 +84,6 @@ public class RefreshAndInheritanceTest {
 	@DiscriminatorColumn(name = "CompanyType", discriminatorType = DiscriminatorType.INTEGER)
 	public static abstract class Company {
 		@Id
-		@GeneratedValue(strategy = GenerationType.IDENTITY)
 		protected long id;
 
 		@OneToMany(mappedBy = "company", orphanRemoval = true, cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@@ -99,6 +97,10 @@ public class RefreshAndInheritanceTest {
 			people.add( person );
 			person.setCompany( this );
 		}
+
+		public void setId(long id) {
+			this.id = id;
+		}
 	}
 
 	@Entity(name = "ComputerSystem")
@@ -106,7 +108,7 @@ public class RefreshAndInheritanceTest {
 	@DiscriminatorColumn(name = "CompanyType", discriminatorType = DiscriminatorType.INTEGER)
 	public static abstract class ComputerSystem {
 		@Id
-		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		@GeneratedValue
 		private long id;
 
 		@ManyToOne
@@ -139,7 +141,7 @@ public class RefreshAndInheritanceTest {
 	@Entity(name = "Person")
 	public static class Person {
 		@Id
-		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		@GeneratedValue
 		private long id;
 
 		private String firstName;

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/fetch/depth/DepthOneBatchTest.java

@@ -52,7 +52,7 @@ import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
 				@Setting(name = AvailableSettings.FORMAT_SQL, value = "false")
 		}
 )
-@RequiresDialect(H2Dialect.class)
+@RequiresDialect(value = H2Dialect.class, majorVersion = 2, comment = "H2 didn't support SQL arrays before version 2")
 @JiraKey("HHH-16469")
 public class DepthOneBatchTest {
 

hibernate-core/src/test/java/org/hibernate/orm/test/query/hql/FunctionTests.java

@@ -1892,8 +1892,9 @@ public class FunctionTests {
 	}
 
 	@Test
-	@SkipForDialect(dialectClass = OracleDialect.class)
-	@SkipForDialect(dialectClass = MariaDBDialect.class)
+	@SkipForDialect(dialectClass = OracleDialect.class, reason = "HHH-16576")
+	@SkipForDialect(dialectClass = MariaDBDialect.class, reason = "HHH-16576")
+	@SkipForDialect(dialectClass = MySQLDialect.class, majorVersion = 5, reason = "HHH-16576")
 	public void testMaxOverUnion(SessionFactoryScope scope) {
 		scope.inTransaction(
 				session -> {

hibernate-envers/src/test/java/org/hibernate/orm/test/envers/integration/collection/EnumSet.java

@@ -148,6 +148,6 @@ public class EnumSet extends BaseEnversJPAFunctionalTestCase {
 	}
 
 	private void verifyMapping(JdbcMapping jdbcMapping) {
-		assertThat( jdbcMapping.getJdbcType().getJdbcTypeCode() ).isIn( Types.VARCHAR, SqlTypes.ENUM );
+		assertThat( jdbcMapping.getJdbcType().getJdbcTypeCode() ).isIn( Types.VARCHAR, Types.NVARCHAR, SqlTypes.ENUM );
 	}
 }