HHH-10463 Implement function argument type inference

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

@@ -173,7 +173,8 @@ public class CacheDialect extends Dialect {
 				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
 				"$find(?2,?1)",
 				"$find(?2,?1,?3)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(pattern, string[, start])");
 		functionFactory.bitLength_pattern( "($length(?1)*8)" );
 

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

@@ -284,7 +284,8 @@ public class FirebirdDialect extends Dialect {
 				integerType,
 				"position(?1 in ?2)",
 				"position(?1,?2,?3)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature( "(pattern, string[, start])" );
 		functionRegistry.namedDescriptorBuilder( "ascii_val" )
 				.setExactArgumentCount( 1 )

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

@@ -288,7 +288,8 @@ public class IngresDialect extends Dialect {
 				integerType,
 				"position(?1 in ?2)",
 				"(position(?1 in substring(?2 from ?3))+(?3)-1)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(pattern, string[, start])");
 
 		queryEngine.getSqmFunctionRegistry().registerPattern( "extract", "date_part('?1',?2)", integerType );

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

@@ -168,7 +168,8 @@ public class MaxDBDialect extends Dialect {
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"locate",
 				integerType, "index(?2,?1)", "index(?2,?1,?3)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(pattern, string[, start])");
 	}
 

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

@@ -277,21 +277,24 @@ public class SQLiteDialect extends Dialect {
 				integerType,
 				"instr(?2,?1)",
 				"instr(?2,?1,?3)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(pattern, string[, start])");
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"lpad",
 				stringType,
 				"(substr(replace(hex(zeroblob(?2)),'00',' '),1,?2-length(?1))||?1)",
 				"(substr(replace(hex(zeroblob(?2)),'00',?3),1,?2-length(?1))||?1)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(string, length[, padding])");
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"rpad",
 				stringType,
 				"(?1||substr(replace(hex(zeroblob(?2)),'00',' '),1,?2-length(?1)))",
 				"(?1||substr(replace(hex(zeroblob(?2)),'00',?3),1,?2-length(?1)))",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(string, length[, padding])");
 
 		queryEngine.getSqmFunctionRegistry().namedDescriptorBuilder("format", "strftime")

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

@@ -168,7 +168,8 @@ public class TimesTenDialect extends Dialect {
 				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
 				"instr(?2,?1)",
 				"instr(?2,?1,?3)",
-				STRING, STRING, INTEGER
+				STRING, STRING, INTEGER,
+				queryEngine.getTypeConfiguration()
 		).setArgumentListSignature("(pattern, string[, start])");
 	}
 

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

@@ -79,6 +79,7 @@ import java.util.regex.Pattern;
 import jakarta.persistence.TemporalType;
 
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
+import org.hibernate.type.spi.TypeConfiguration;
 
 /**
  * An abstract base class for SAP HANA dialects.
@@ -274,13 +275,15 @@ public abstract class AbstractHANADialect extends Dialect {
 	@Override
 	public void initializeFunctionRegistry(QueryEngine queryEngine) {
 		super.initializeFunctionRegistry( queryEngine );
+		final TypeConfiguration typeConfiguration = queryEngine.getTypeConfiguration();
 
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"locate",
-				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
 				"locate(?2,?1)",
 				"locate(?2,?1,?3)",
-				FunctionParameterType.STRING, FunctionParameterType.STRING, FunctionParameterType.INTEGER
+				FunctionParameterType.STRING, FunctionParameterType.STRING, FunctionParameterType.INTEGER,
+				typeConfiguration
 		).setArgumentListSignature("(pattern, string[, start])");
 
 		CommonFunctionFactory functionFactory = new CommonFunctionFactory(queryEngine);
@@ -317,7 +320,7 @@ public abstract class AbstractHANADialect extends Dialect {
 		functionFactory.hypotheticalOrderedSetAggregates_windowEmulation();
 
 		queryEngine.getSqmFunctionRegistry().register( "timestampadd",
-				new IntegralTimestampaddFunction( this, queryEngine.getTypeConfiguration() ) );
+				new IntegralTimestampaddFunction( this, typeConfiguration ) );
 	}
 
 	@Override

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

@@ -142,7 +142,6 @@ public abstract class AbstractTransactSQLDialect extends Dialect {
 		functionFactory.yearMonthDay();
 		functionFactory.ascii();
 		functionFactory.chr_char();
-		functionFactory.concat_plusOperator();
 		functionFactory.trim1();
 		functionFactory.repeat_replicate();
 		functionFactory.characterLength_len();

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

@@ -160,6 +160,7 @@ import org.hibernate.type.descriptor.jdbc.NCharJdbcType;
 import org.hibernate.type.descriptor.jdbc.NClobJdbcType;
 import org.hibernate.type.descriptor.jdbc.NVarcharJdbcType;
 import org.hibernate.type.descriptor.jdbc.spi.JdbcTypeRegistry;
+import org.hibernate.type.spi.TypeConfiguration;
 
 import jakarta.persistence.TemporalType;
 
@@ -769,7 +770,8 @@ public abstract class Dialect implements ConversionContext {
 	 * same names.
 	 */
 	public void initializeFunctionRegistry(QueryEngine queryEngine) {
-		final BasicTypeRegistry basicTypeRegistry = queryEngine.getTypeConfiguration().getBasicTypeRegistry();
+		final TypeConfiguration typeConfiguration = queryEngine.getTypeConfiguration();
+		final BasicTypeRegistry basicTypeRegistry = typeConfiguration.getBasicTypeRegistry();
 		final BasicType<Date> timestampType = basicTypeRegistry.resolve( StandardBasicTypes.TIMESTAMP );
 		final BasicType<Date> dateType = basicTypeRegistry.resolve( StandardBasicTypes.DATE );
 		final BasicType<Date> timeType = basicTypeRegistry.resolve( StandardBasicTypes.TIME );
@@ -842,20 +844,20 @@ public abstract class Dialect implements ConversionContext {
 		//define it here as an alias for locate()
 
 		queryEngine.getSqmFunctionRegistry().register( "position",
-				new LocatePositionEmulation( queryEngine.getTypeConfiguration() ) );
+				new LocatePositionEmulation( typeConfiguration ) );
 
 		//very few databases support ANSI-style overlay() function, so emulate
 		//it here in terms of either insert() or concat()/substring()
 
 		queryEngine.getSqmFunctionRegistry().register( "overlay",
-				new InsertSubstringOverlayEmulation( queryEngine.getTypeConfiguration(), false ) );
+				new InsertSubstringOverlayEmulation( typeConfiguration, false ) );
 
 		//ANSI SQL trim() function is supported on almost all of the databases
 		//we care about, but on some it must be emulated using ltrim(), rtrim(),
 		//and replace()
 
 		queryEngine.getSqmFunctionRegistry().register( "trim",
-				new TrimFunction( this, queryEngine.getTypeConfiguration() ) );
+				new TrimFunction( this, typeConfiguration ) );
 
 		//ANSI SQL cast() function is supported on the databases we care most
 		//about but in certain cases it doesn't allow some useful typecasts,
@@ -883,7 +885,7 @@ public abstract class Dialect implements ConversionContext {
 		//a very dialect-specific way
 
 		queryEngine.getSqmFunctionRegistry().register( "extract",
-				new ExtractFunction( this ) );
+				new ExtractFunction( this, typeConfiguration ) );
 
 		//comparison functions supported on most databases, emulated on others
 		//using a case expression
@@ -905,13 +907,13 @@ public abstract class Dialect implements ConversionContext {
 		//pad() is a function we've designed to look like ANSI trim()
 
 		queryEngine.getSqmFunctionRegistry().register( "pad",
-				new LpadRpadPadEmulation( queryEngine.getTypeConfiguration() ) );
+				new LpadRpadPadEmulation( typeConfiguration ) );
 
 		//legacy Hibernate convenience function for casting to string, defined
 		//here as an alias for cast(arg as String)
 
 		queryEngine.getSqmFunctionRegistry().register( "str",
-				new CastStrEmulation( queryEngine.getTypeConfiguration() ) );
+				new CastStrEmulation( typeConfiguration ) );
 
 		//format() function for datetimes, emulated on many databases using the
 		//Oracle-style to_char() function, and on others using their native
@@ -923,9 +925,9 @@ public abstract class Dialect implements ConversionContext {
 		//since there is a great variety of different ways to emulate them
 
 		queryEngine.getSqmFunctionRegistry().register( "timestampadd",
-				new TimestampaddFunction( this ) );
+				new TimestampaddFunction( this, typeConfiguration ) );
 		queryEngine.getSqmFunctionRegistry().register( "timestampdiff",
-				new TimestampdiffFunction( this, queryEngine.getTypeConfiguration() ) );
+				new TimestampdiffFunction( this, typeConfiguration ) );
 		queryEngine.getSqmFunctionRegistry().registerAlternateKey( "dateadd", "timestampadd" );
 		queryEngine.getSqmFunctionRegistry().registerAlternateKey( "datediff", "timestampdiff" );
 

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

@@ -19,6 +19,7 @@ import org.hibernate.dialect.temptable.TemporaryTableKind;
 import org.hibernate.query.sqm.mutation.spi.SqmMultiTableInsertStrategy;
 import org.hibernate.query.sqm.mutation.spi.SqmMultiTableMutationStrategy;
 import org.hibernate.type.StandardBasicTypes;
+import org.hibernate.type.spi.TypeConfiguration;
 
 import static org.hibernate.query.sqm.produce.function.FunctionParameterType.ANY;
 
@@ -102,20 +103,22 @@ public class HANAColumnStoreDialect extends AbstractHANADialect {
 	@Override
 	public void initializeFunctionRegistry(QueryEngine queryEngine) {
 		super.initializeFunctionRegistry( queryEngine );
+		final TypeConfiguration typeConfiguration = queryEngine.getTypeConfiguration();
 
 		// full-text search functions
 		queryEngine.getSqmFunctionRegistry().registerNamed(
 				"score",
-				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE )
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE )
 		);
 		queryEngine.getSqmFunctionRegistry().registerNamed( "snippets" );
 		queryEngine.getSqmFunctionRegistry().registerNamed( "highlighted" );
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"contains",
-				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN ),
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN ),
 				"contains(?1,?2)",
 				"contains(?1,?2,?3)",
-				ANY, ANY, ANY
+				ANY, ANY, ANY,
+				typeConfiguration
 		);
 	}
 

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

@@ -93,6 +93,8 @@ import static org.hibernate.query.sqm.TemporalUnit.SECOND;
 import static org.hibernate.query.sqm.TemporalUnit.YEAR;
 
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
+import org.hibernate.type.spi.TypeConfiguration;
+
 import static org.hibernate.type.SqlTypes.*;
 
 /**
@@ -136,6 +138,7 @@ public class OracleDialect extends Dialect {
 	@Override
 	public void initializeFunctionRegistry(QueryEngine queryEngine) {
 		super.initializeFunctionRegistry( queryEngine );
+		final TypeConfiguration typeConfiguration = queryEngine.getTypeConfiguration();
 
 		CommonFunctionFactory functionFactory = new CommonFunctionFactory(queryEngine);
 		functionFactory.cosh();
@@ -185,10 +188,11 @@ public class OracleDialect extends Dialect {
 
 		queryEngine.getSqmFunctionRegistry().registerBinaryTernaryPattern(
 				"locate",
-				queryEngine.getTypeConfiguration().getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
+				typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER ),
 				"instr(?2,?1)",
 				"instr(?2,?1,?3)",
-				FunctionParameterType.STRING, FunctionParameterType.STRING, FunctionParameterType.INTEGER
+				FunctionParameterType.STRING, FunctionParameterType.STRING, FunctionParameterType.INTEGER,
+				typeConfiguration
 		).setArgumentListSignature("(pattern, string[, start])");
 		// The within group clause became optional in 18
 		if ( getVersion().isSameOrAfter( 18 ) ) {
@@ -203,7 +207,7 @@ public class OracleDialect extends Dialect {
 		// Oracle has a regular aggregate function named stats_mode
 		queryEngine.getSqmFunctionRegistry().register(
 				"mode",
-				new ModeStatsModeEmulation( queryEngine.getTypeConfiguration() )
+				new ModeStatsModeEmulation( typeConfiguration )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/AvgFunction.java

@@ -15,7 +15,9 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -49,7 +51,8 @@ public class AvgFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 1 ), NUMERIC ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, NUMERIC )
 		);
 		this.defaultArgumentRenderingMode = defaultArgumentRenderingMode;
 		doubleType = typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.DOUBLE );
@@ -80,8 +83,10 @@ public class AvgFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 			arg = (Expression) sqlAstArguments.get( 0 );
 		}
 		if ( caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( "case when " );
 			filter.accept( translator );
+			translator.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then " );
 			renderArgument( sqlAppender, translator, arg );
 			sqlAppender.appendSql( " else null end)" );
@@ -90,9 +95,11 @@ public class AvgFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 			renderArgument( sqlAppender, translator, arg );
 			sqlAppender.appendSql( ')' );
 			if ( filter != null ) {
+				translator.getCurrentClauseStack().push( Clause.WHERE );
 				sqlAppender.appendSql( " filter (where " );
 				filter.accept( translator );
 				sqlAppender.appendSql( ')' );
+				translator.getCurrentClauseStack().pop();
 			}
 		}
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/CaseLeastGreatestEmulation.java

@@ -11,6 +11,7 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -33,7 +34,8 @@ public class CaseLeastGreatestEmulation
 		super(
 				least ? "least" : "greatest",
 				new ArgumentTypesValidator( StandardArgumentsValidators.min( 2 ), COMPARABLE, COMPARABLE ),
-				StandardFunctionReturnTypeResolvers.useFirstNonNull()
+				StandardFunctionReturnTypeResolvers.useFirstNonNull(),
+				StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE
 		);
 		this.operator = least ? "<=" : ">=";
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/CastFunction.java

@@ -14,6 +14,7 @@ import org.hibernate.metamodel.mapping.JdbcMapping;
 import org.hibernate.query.sqm.CastType;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -38,7 +39,8 @@ public class CastFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 		super(
 				"cast",
 				StandardArgumentsValidators.exactly( 2 ),
-				StandardFunctionReturnTypeResolvers.useArgType( 2 )
+				StandardFunctionReturnTypeResolvers.useArgType( 2 ),
+				StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE
 		);
 		this.dialect = dialect;
 		this.booleanCastType = getBooleanCastType( preferredSqlTypeCodeForBoolean );

hibernate-core/src/main/java/org/hibernate/dialect/function/CastStrEmulation.java

@@ -37,7 +37,8 @@ public class CastStrEmulation
 				StandardArgumentsValidators.exactly( 1 ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				null
 		);
 	}
 
@@ -45,7 +46,7 @@ public class CastStrEmulation
 			String name,
 			ArgumentsValidator argumentsValidator,
 			FunctionReturnTypeResolver returnTypeResolver) {
-		super( name, argumentsValidator, returnTypeResolver );
+		super( name, argumentsValidator, returnTypeResolver, null );
 	}
 
 	@Override

hibernate-core/src/main/java/org/hibernate/dialect/function/CastingConcatFunction.java

@@ -15,6 +15,7 @@ import org.hibernate.query.sqm.CastType;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
@@ -42,10 +43,11 @@ public class CastingConcatFunction extends AbstractSqmSelfRenderingFunctionDescr
 			TypeConfiguration typeConfiguration) {
 		super(
 				"concat",
-				new ArgumentTypesValidator( StandardArgumentsValidators.min( 1 ), STRING ),
+				StandardArgumentsValidators.min( 1 ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.impliedOrInvariant( typeConfiguration, STRING )
 		);
 		this.dialect = dialect;
 		this.concatOperator = concatOperator;

hibernate-core/src/main/java/org/hibernate/dialect/function/CoalesceIfnullEmulation.java

@@ -11,6 +11,7 @@ import org.hibernate.query.spi.QueryEngine;
 import org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor;
 import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.type.spi.TypeConfiguration;
 
@@ -25,7 +26,8 @@ public class CoalesceIfnullEmulation
 	public CoalesceIfnullEmulation() {
 		super(
 				"ifnull",
-				StandardArgumentsValidators.exactly( 2 )
+				StandardArgumentsValidators.exactly( 2 ),
+				StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/CommonFunctionFactory.java

@@ -16,6 +16,7 @@ import org.hibernate.query.sqm.function.SqmFunctionRegistry;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.type.BasicType;
 import org.hibernate.type.BasicTypeRegistry;
@@ -454,14 +455,16 @@ public class CommonFunctionFactory {
 				stringType,
 				"lpad(?1,?2,' ')",
 				"lpad(?1,?2,?3)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 		functionRegistry.registerBinaryTernaryPattern(
 				"rpad",
 				stringType,
 				"rpad(?1,?2,' ')",
 				"rpad(?1,?2,?3)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 	}
 
@@ -474,14 +477,16 @@ public class CommonFunctionFactory {
 				stringType,
 				"(space(?2-len(?1))+?1)",
 				"(replicate(?3,?2-len(?1))+?1)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 		functionRegistry.registerBinaryTernaryPattern(
 				"rpad",
 				stringType,
 				"(?1+space(?2-len(?1)))",
 				"(?1+replicate(?3,?2-len(?1)))",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 	}
 
@@ -491,14 +496,16 @@ public class CommonFunctionFactory {
 				stringType,
 				"(repeat(' ',?2-character_length(?1))||?1)",
 				"(repeat(?3,?2-character_length(?1))||?1)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 		functionRegistry.registerBinaryTernaryPattern(
 				"rpad",
 				stringType,
 				"(?1||repeat(' ',?2-character_length(?1)))",
 				"(?1||repeat(?3,?2-character_length(?1)))",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 	}
 
@@ -511,14 +518,16 @@ public class CommonFunctionFactory {
 				stringType,
 				"lfill(?1,' ',?2)",
 				"lfill(?1,?3,?2)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 		functionRegistry.registerBinaryTernaryPattern(
 				"rpad",
 				stringType,
 				"rfill(?1,' ',?2)",
 				"rfill(?1,?3,?2)",
-				STRING, INTEGER, STRING
+				STRING, INTEGER, STRING,
+				typeConfiguration
 		).setArgumentListSignature( "(string, length[, padding])" );
 	}
 
@@ -606,6 +615,7 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "md5" )
 				.setInvariantType(stringType)
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -613,6 +623,7 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "initcap" )
 				.setInvariantType(stringType)
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -638,30 +649,35 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "translate" )
 				.setInvariantType(stringType)
 				.setExactArgumentCount( 3 )
+				.setParameterTypes( STRING, STRING, STRING )
 				.register();
 	}
 
 	public void bitand() {
 		functionRegistry.namedDescriptorBuilder( "bitand" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
 	public void bitor() {
 		functionRegistry.namedDescriptorBuilder( "bitor" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
 	public void bitxor() {
 		functionRegistry.namedDescriptorBuilder( "bitxor" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
 	public void bitnot() {
 		functionRegistry.namedDescriptorBuilder( "bitnot" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -671,21 +687,25 @@ public class CommonFunctionFactory {
 	public void bitandorxornot_bitAndOrXorNot() {
 		functionRegistry.namedDescriptorBuilder( "bit_and" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitand", "bit_and" );
 
 		functionRegistry.namedDescriptorBuilder( "bit_or" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitor", "bit_or" );
 
 		functionRegistry.namedDescriptorBuilder( "bit_xor" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitxor", "bit_xor" );
 
 		functionRegistry.namedDescriptorBuilder( "bit_not" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitnot", "bit_not" );
 	}
@@ -696,21 +716,25 @@ public class CommonFunctionFactory {
 	public void bitandorxornot_binAndOrXorNot() {
 		functionRegistry.namedDescriptorBuilder( "bin_and" )
 				.setMinArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitand", "bin_and" );
 
 		functionRegistry.namedDescriptorBuilder( "bin_or" )
 				.setMinArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitor", "bin_or" );
 
 		functionRegistry.namedDescriptorBuilder( "bin_xor" )
 				.setMinArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitxor", "bin_xor" );
 
 		functionRegistry.namedDescriptorBuilder( "bin_not" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "bitnot", "bin_not" );
 	}
@@ -721,18 +745,22 @@ public class CommonFunctionFactory {
 	public void bitandorxornot_operator() {
 		functionRegistry.patternDescriptorBuilder( "bitand", "(?1&?2)" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.patternDescriptorBuilder( "bitor", "(?1|?2)" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.patternDescriptorBuilder( "bitxor", "(?1^?2)" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.patternDescriptorBuilder( "bitnot", "~?1" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -742,10 +770,12 @@ public class CommonFunctionFactory {
 	public void bitAndOr() {
 		functionRegistry.namedAggregateDescriptorBuilder( "bit_and" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.namedAggregateDescriptorBuilder( "bit_or" )
 				.setExactArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 
 		//MySQL has it but how is that even useful?
@@ -978,21 +1008,25 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "to_number" )
 				//always 1 arg on HSQL and Cache, always 2 on Postgres
 				.setArgumentCountBetween( 1, 3 )
+				.setParameterTypes( STRING, STRING, STRING )
 				.setInvariantType(doubleType)
 				.register();
 		functionRegistry.namedDescriptorBuilder( "to_char" )
 				.setArgumentCountBetween( 1, 3 )
+				.setParameterTypes( ANY, STRING, STRING )
 				//always 2 args on HSQL and Postgres
 				.setInvariantType(stringType)
 				.register();
 		functionRegistry.namedDescriptorBuilder( "to_date" )
 				//always 2 args on HSQL and Postgres
 				.setArgumentCountBetween( 1, 3 )
+				.setParameterTypes( STRING, STRING, STRING )
 				.setInvariantType(dateType)
 				.register();
 		functionRegistry.namedDescriptorBuilder( "to_timestamp" )
 				//always 2 args on HSQL and Postgres
 				.setArgumentCountBetween( 1, 3 )
+				.setParameterTypes( STRING, STRING, STRING )
 				.setInvariantType(timestampType)
 				.register();
 	}
@@ -1073,19 +1107,9 @@ public class CommonFunctionFactory {
 		functionRegistry.patternDescriptorBuilder( "concat", "(?1||?2...)" )
 				.setInvariantType(stringType)
 				.setMinArgumentCount( 1 )
-				.setParameterTypes(STRING)
+				.setArgumentTypeResolver(
-				.setArgumentListSignature( "(STRING string0[, STRING string1[, ...]])" )
+						StandardFunctionArgumentTypeResolvers.impliedOrInvariant( typeConfiguration, STRING )
-				.register();
+				)
-	}
-
-	/**
-	 * Transact SQL-style
-	 */
-	public void concat_plusOperator() {
-		functionRegistry.patternDescriptorBuilder( "concat", "(?1+?2...)" )
-				.setInvariantType(stringType)
-				.setMinArgumentCount( 1 )
-				.setParameterTypes(STRING)
 				.setArgumentListSignature( "(STRING string0[, STRING string1[, ...]])" )
 				.register();
 	}
@@ -1297,6 +1321,7 @@ public class CommonFunctionFactory {
 	public void coalesce() {
 		functionRegistry.namedDescriptorBuilder( "coalesce" )
 				.setMinArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -1306,6 +1331,7 @@ public class CommonFunctionFactory {
 	public void coalesce_value() {
 		functionRegistry.namedDescriptorBuilder( "value" )
 				.setMinArgumentCount( 1 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.registerAlternateKey( "coalesce", "value" );
 	}
@@ -1313,6 +1339,7 @@ public class CommonFunctionFactory {
 	public void nullif() {
 		functionRegistry.namedDescriptorBuilder( "nullif" )
 				.setExactArgumentCount( 2 )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -1420,7 +1447,8 @@ public class CommonFunctionFactory {
 						"locate",
 						integerType,
 						"position(?1 in ?2)", "(position(?1 in substring(?2 from ?3))+(?3)-1)",
-						STRING, STRING, INTEGER
+						STRING, STRING, INTEGER,
+						typeConfiguration
 				)
 				.setArgumentListSignature( "(STRING pattern, STRING string[, INTEGER start])" );
 	}
@@ -1432,7 +1460,8 @@ public class CommonFunctionFactory {
 						"substring",
 						stringType,
 						"substring(?1 from ?2)", "substring(?1 from ?2 for ?3)",
-						STRING, INTEGER, INTEGER
+						STRING, INTEGER, INTEGER,
+						typeConfiguration
 				)
 				.setArgumentListSignature( "(STRING string{ from|,} INTEGER start[{ for|,} INTEGER length])" );
 	}
@@ -1459,7 +1488,8 @@ public class CommonFunctionFactory {
 						stringType,
 						"substring(?1,?2,len(?1)-?2+1)",
 						"substring(?1,?2,?3)",
-						STRING, INTEGER, INTEGER
+						STRING, INTEGER, INTEGER,
+						typeConfiguration
 				)
 				.setArgumentListSignature( "(STRING string{ from|,} INTEGER start[{ for|,} INTEGER length])" );
 	}
@@ -1508,7 +1538,8 @@ public class CommonFunctionFactory {
 						stringType,
 						"overlay(?1 placing ?2 from ?3)",
 						"overlay(?1 placing ?2 from ?3 for ?4)",
-						STRING, STRING, INTEGER, INTEGER
+						STRING, STRING, INTEGER, INTEGER,
+						typeConfiguration
 				)
 				.setArgumentListSignature( "(string placing replacement from start[ for length])" );
 	}
@@ -1524,7 +1555,8 @@ public class CommonFunctionFactory {
 						//because DB2 doesn't like "length(?)"
 						"overlay(?1 placing ?2 from ?3 for character_length(?2))",
 						"overlay(?1 placing ?2 from ?3 for ?4)",
-						STRING, STRING, INTEGER, INTEGER
+						STRING, STRING, INTEGER, INTEGER,
+						typeConfiguration
 				)
 				.setArgumentListSignature( "(string placing replacement from start[ for length])" );
 	}
@@ -1555,7 +1587,9 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "concat" )
 				.setInvariantType(stringType)
 				.setMinArgumentCount( 1 )
-				.setParameterTypes(STRING)
+				.setArgumentTypeResolver(
+						StandardFunctionArgumentTypeResolvers.impliedOrInvariant( typeConfiguration, STRING )
+				)
 				.setArgumentListSignature( "(STRING string0[, STRING string1[, ...]])" )
 				.register();
 	}
@@ -1644,10 +1678,12 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "least" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.namedDescriptorBuilder( "greatest" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -1655,10 +1691,12 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "least", "min" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.namedDescriptorBuilder( "greatest", "max" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -1666,10 +1704,12 @@ public class CommonFunctionFactory {
 		functionRegistry.namedDescriptorBuilder( "least", "minvalue" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 		functionRegistry.namedDescriptorBuilder( "greatest", "maxvalue" )
 				.setMinArgumentCount( 2 )
 				.setParameterTypes(COMPARABLE, COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE )
 				.register();
 	}
 
@@ -1682,12 +1722,14 @@ public class CommonFunctionFactory {
 				.setArgumentRenderingMode( inferenceArgumentRenderingMode )
 				.setExactArgumentCount( 1 )
 				.setParameterTypes(COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.namedAggregateDescriptorBuilder( "min" )
 				.setArgumentRenderingMode( inferenceArgumentRenderingMode )
 				.setExactArgumentCount( 1 )
 				.setParameterTypes(COMPARABLE)
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.register();
 
 		functionRegistry.namedAggregateDescriptorBuilder( "sum" )
@@ -1835,26 +1877,43 @@ public class CommonFunctionFactory {
 		functionRegistry.namedWindowDescriptorBuilder( "lag" )
 				.setArgumentCountBetween( 1, 3 )
 				.setParameterTypes( ANY, INTEGER, ANY )
+				.setArgumentTypeResolver(
+						StandardFunctionArgumentTypeResolvers.composite(
+								StandardFunctionArgumentTypeResolvers.argumentsOrImplied( 2 ),
+								StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, INTEGER ),
+								StandardFunctionArgumentTypeResolvers.argumentsOrImplied( 0 )
+						)
+				)
 				.setArgumentListSignature( "ANY value[, INTEGER offset[, ANY default]]" )
 				.register();
 		functionRegistry.namedWindowDescriptorBuilder( "lead" )
 				.setArgumentCountBetween( 1, 3 )
 				.setParameterTypes( ANY, INTEGER, ANY )
+				.setArgumentTypeResolver(
+						StandardFunctionArgumentTypeResolvers.composite(
+								StandardFunctionArgumentTypeResolvers.argumentsOrImplied( 2 ),
+								StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, INTEGER ),
+								StandardFunctionArgumentTypeResolvers.argumentsOrImplied( 0 )
+						)
+				)
 				.setArgumentListSignature( "ANY value[, INTEGER offset[, ANY default]]" )
 				.register();
 		functionRegistry.namedWindowDescriptorBuilder( "first_value" )
 				.setExactArgumentCount( 1 )
 				.setParameterTypes( ANY )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.setArgumentListSignature( "ANY value" )
 				.register();
 		functionRegistry.namedWindowDescriptorBuilder( "last_value" )
 				.setExactArgumentCount( 1 )
 				.setParameterTypes( ANY )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.setArgumentListSignature( "ANY value" )
 				.register();
 		functionRegistry.namedWindowDescriptorBuilder( "nth_value" )
 				.setExactArgumentCount( 2 )
 				.setParameterTypes( ANY, INTEGER )
+				.setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE )
 				.setArgumentListSignature( "ANY value, INTEGER nth" )
 				.register();
 	}
@@ -1969,6 +2028,7 @@ public class CommonFunctionFactory {
 	public void crc32() {
 		functionRegistry.namedDescriptorBuilder( "crc32" )
 				.setInvariantType(integerType)
+				.setParameterTypes( STRING )
 				.setExactArgumentCount( 1 )
 				.register();
 	}
@@ -1976,6 +2036,7 @@ public class CommonFunctionFactory {
 	public void sha1() {
 		functionRegistry.namedDescriptorBuilder( "sha1" )
 				.setInvariantType(stringType)
+				.setParameterTypes( STRING )
 				.setExactArgumentCount( 1 )
 				.register();
 	}
@@ -1983,6 +2044,7 @@ public class CommonFunctionFactory {
 	public void sha2() {
 		functionRegistry.namedDescriptorBuilder( "sha2" )
 				.setInvariantType(stringType)
+				.setParameterTypes( STRING, INTEGER )
 				.setExactArgumentCount( 2 )
 				.register();
 	}
@@ -1990,6 +2052,7 @@ public class CommonFunctionFactory {
 	public void sha() {
 		functionRegistry.namedDescriptorBuilder( "sha" )
 				.setInvariantType(stringType)
+				.setParameterTypes( STRING )
 				.setExactArgumentCount( 1 )
 				.register();
 	}
@@ -2156,6 +2219,7 @@ public class CommonFunctionFactory {
 	public void format_formatdatetime() {
 		functionRegistry.namedDescriptorBuilder( "format", "formatdatetime" )
 				.setInvariantType(stringType)
+				.setParameterTypes( TEMPORAL, STRING )
 				.setArgumentsValidator( formatValidator() )
 				.setArgumentListSignature( "(TEMPORAL datetime as STRING pattern)" )
 				.register();
@@ -2169,6 +2233,7 @@ public class CommonFunctionFactory {
 	public void format_toChar() {
 		functionRegistry.namedDescriptorBuilder( "format", "to_char" )
 				.setInvariantType(stringType)
+				.setParameterTypes( TEMPORAL, STRING )
 				.setArgumentsValidator( formatValidator() )
 				.setArgumentListSignature( "(TEMPORAL datetime as STRING pattern)" )
 				.register();
@@ -2182,6 +2247,7 @@ public class CommonFunctionFactory {
 	public void format_dateFormat() {
 		functionRegistry.namedDescriptorBuilder( "format", "date_format" )
 				.setInvariantType(stringType)
+				.setParameterTypes( TEMPORAL, STRING )
 				.setArgumentsValidator( formatValidator() )
 				.setArgumentListSignature( "(TEMPORAL datetime as STRING pattern)" )
 				.register();
@@ -2195,6 +2261,7 @@ public class CommonFunctionFactory {
 	public void format_toVarchar() {
 		functionRegistry.namedDescriptorBuilder( "format", "to_varchar" )
 				.setInvariantType(stringType)
+				.setParameterTypes( TEMPORAL, STRING )
 				.setArgumentsValidator( formatValidator() )
 				.setArgumentListSignature( "(TEMPORAL datetime as STRING pattern)" )
 				.register();
@@ -2223,7 +2290,7 @@ public class CommonFunctionFactory {
 		functionRegistry.patternDescriptorBuilder("collate", "(?1 collate '?2')")
 				.setInvariantType(stringType)
 				.setExactArgumentCount( 2 )
-				.setParameterTypes(STRING, ANY)
+				.setParameterTypes(STRING, COLLATION)
 				.setArgumentListSignature("(STRING string as COLLATION collation)")
 				.register();
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/CountFunction.java

@@ -20,6 +20,7 @@ import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.query.sqm.sql.internal.AbstractSqmPathInterpretation;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -58,7 +59,8 @@ public class CountFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 				StandardArgumentsValidators.exactly( 1 ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.LONG )
-				)
+				),
+				null
 		);
 		this.dialect = dialect;
 		this.defaultArgumentRenderingMode = defaultArgumentRenderingMode;
@@ -102,9 +104,11 @@ public class CountFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 					// In the end, the expression looks like the following:
 					// count(distinct coalesce(nullif(coalesce(col1 || '', '\0'), ''), '\01') || '\0' || coalesce(nullif(coalesce(col2 || '', '\0'), ''), '\02'))
 					if ( caseWrapper ) {
+						translator.getCurrentClauseStack().push( Clause.WHERE );
 						sqlAppender.appendSql( "case when " );
 						filter.accept( translator );
 						sqlAppender.appendSql( " then " );
+						translator.getCurrentClauseStack().pop();
 					}
 					sqlAppender.appendSql( "coalesce(nullif(coalesce(" );
 					renderCastedArgument( sqlAppender, translator, expressions.get( 0 ) );
@@ -162,7 +166,9 @@ public class CountFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 				else if ( !dialect.supportsTupleCounts() ) {
 					sqlAppender.appendSql( "case when " );
 					if ( caseWrapper ) {
+						translator.getCurrentClauseStack().push( Clause.WHERE );
 						filter.accept( translator );
+						translator.getCurrentClauseStack().pop();
 						sqlAppender.appendSql( " and " );
 					}
 					translator.render( expressions.get( 0 ), defaultArgumentRenderingMode );
@@ -193,9 +199,11 @@ public class CountFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 		}
 		sqlAppender.appendSql( ')' );
 		if ( filter != null && !caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 
@@ -250,8 +258,10 @@ public class CountFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 			boolean caseWrapper,
 			SqlAstNode realArg) {
 		if ( caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( "case when " );
 			filter.accept( translator );
+			translator.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then " );
 			if ( realArg instanceof Star ) {
 				sqlAppender.appendSql( "1" );

hibernate-core/src/main/java/org/hibernate/dialect/function/CurrentFunction.java

@@ -31,7 +31,8 @@ public class CurrentFunction
 		super(
 				name,
 				StandardArgumentsValidators.NO_ARGS,
-				StandardFunctionReturnTypeResolvers.invariant( type )
+				StandardFunctionReturnTypeResolvers.invariant( type ),
+				null
 		);
 		this.sql = sql;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/DB2FormatEmulation.java

@@ -8,6 +8,7 @@ package org.hibernate.dialect.function;
 
 import org.hibernate.dialect.OracleDialect;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -20,6 +21,9 @@ import org.hibernate.type.spi.TypeConfiguration;
 import java.util.List;
 import jakarta.persistence.TemporalType;
 
+import static org.hibernate.query.sqm.produce.function.FunctionParameterType.STRING;
+import static org.hibernate.query.sqm.produce.function.FunctionParameterType.TEMPORAL;
+
 /**
  * DB2's varchar_format() can't handle quoted literal strings in
  * the format pattern. So just split the pattern into bits, call
@@ -37,7 +41,8 @@ public class DB2FormatEmulation
 				CommonFunctionFactory.formatValidator(),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TEMPORAL, STRING )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/DerbyLpadEmulation.java

@@ -11,6 +11,7 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -36,7 +37,8 @@ public class DerbyLpadEmulation
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, INTEGER ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, INTEGER )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/DerbyRpadEmulation.java

@@ -11,6 +11,7 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -36,7 +37,8 @@ public class DerbyRpadEmulation
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, INTEGER ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, INTEGER )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/EveryAnyEmulation.java

@@ -12,7 +12,9 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -43,7 +45,8 @@ public class EveryAnyEmulation extends AbstractSqmSelfRenderingFunctionDescripto
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 1 ), BOOLEAN ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, BOOLEAN )
 		);
 		this.every = every;
 	}
@@ -56,7 +59,9 @@ public class EveryAnyEmulation extends AbstractSqmSelfRenderingFunctionDescripto
 			SqlAstTranslator<?> walker) {
 		sqlAppender.appendSql( "(sum(case when " );
 		if ( filter != null ) {
+			walker.getCurrentClauseStack().push( Clause.WHERE );
 			filter.accept( walker );
+			walker.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then case when " );
 			sqlAstArguments.get( 0 ).accept( walker );
 			if ( every ) {

hibernate-core/src/main/java/org/hibernate/dialect/function/ExtractFunction.java

@@ -16,6 +16,7 @@ import org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor;
 import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.expression.*;
@@ -44,14 +45,15 @@ public class ExtractFunction
 
 	private final Dialect dialect;
 
-	public ExtractFunction(Dialect dialect) {
+	public ExtractFunction(Dialect dialect, TypeConfiguration typeConfiguration) {
 		super(
 				"extract",
 				new ArgumentTypesValidator(
 						StandardArgumentsValidators.exactly( 2 ),
 						TEMPORAL_UNIT, TEMPORAL
 				),
-				StandardFunctionReturnTypeResolvers.useArgType( 1 )
+				StandardFunctionReturnTypeResolvers.useArgType( 1 ),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TEMPORAL_UNIT, TEMPORAL )
 		);
 		this.dialect = dialect;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/HypotheticalSetFunction.java

@@ -12,6 +12,7 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -32,7 +33,8 @@ public class HypotheticalSetFunction extends AbstractSqmSelfRenderingFunctionDes
 				null,
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( returnType )
-				)
+				),
+				null
 		);
 	}
 
@@ -74,6 +76,7 @@ public class HypotheticalSetFunction extends AbstractSqmSelfRenderingFunctionDes
 		}
 		sqlAppender.appendSql( ')' );
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by " );
 			withinGroup.get( 0 ).accept( translator );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -81,11 +84,14 @@ public class HypotheticalSetFunction extends AbstractSqmSelfRenderingFunctionDes
 				withinGroup.get( i ).accept( translator );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 		if ( filter != null ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/InsertSubstringOverlayEmulation.java

@@ -15,6 +15,7 @@ import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.function.SqmFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.expression.SqmBinaryArithmetic;
@@ -54,7 +55,8 @@ public class InsertSubstringOverlayEmulation
 				),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, STRING, INTEGER, INTEGER )
 		);
 		this.strictSubstring = strictSubstring;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/IntegralTimestampaddFunction.java

@@ -41,7 +41,7 @@ public class IntegralTimestampaddFunction
 	private final BasicType<Integer> integerType;
 
 	public IntegralTimestampaddFunction(Dialect dialect, TypeConfiguration typeConfiguration) {
-		super( dialect );
+		super( dialect, typeConfiguration );
 		this.dialect = dialect;
 		this.integerType = typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER );
 		//This is kinda wrong, we're supposed to use findFunctionDescriptor("cast"), not instantiate CastFunction

hibernate-core/src/main/java/org/hibernate/dialect/function/InverseDistributionFunction.java

@@ -20,10 +20,12 @@ import org.hibernate.query.sqm.function.SelfRenderingSqmOrderedSetAggregateFunct
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.sql.SqmToSqlAstConverter;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.query.sqm.tree.select.SqmOrderByClause;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -44,7 +46,10 @@ public class InverseDistributionFunction extends AbstractSqmSelfRenderingFunctio
 				parameterType == null
 						? StandardArgumentsValidators.exactly( 0 )
 						: new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 1 ), parameterType ),
-				null
+				null,
+				parameterType == null
+						? null
+						: StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, parameterType )
 		);
 	}
 
@@ -103,6 +108,7 @@ public class InverseDistributionFunction extends AbstractSqmSelfRenderingFunctio
 		}
 		sqlAppender.appendSql( ')' );
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by " );
 			withinGroup.get( 0 ).accept( translator );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -110,11 +116,14 @@ public class InverseDistributionFunction extends AbstractSqmSelfRenderingFunctio
 				withinGroup.get( i ).accept( translator );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 		if ( filter != null ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/ListaggFunction.java

@@ -13,7 +13,9 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -40,7 +42,8 @@ public class ListaggFunction extends AbstractSqmSelfRenderingFunctionDescriptor
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, STRING ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, STRING )
 		);
 		this.emptyWithinReplacement = emptyWithinReplacement;
 	}
@@ -82,7 +85,9 @@ public class ListaggFunction extends AbstractSqmSelfRenderingFunctionDescriptor
 		}
 		if ( caseWrapper ) {
 			sqlAppender.appendSql( "case when " );
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			filter.accept( translator );
+			translator.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then " );
 			arg.accept( translator );
 			sqlAppender.appendSql( " else null end" );
@@ -96,6 +101,7 @@ public class ListaggFunction extends AbstractSqmSelfRenderingFunctionDescriptor
 		}
 		sqlAppender.appendSql( ')' );
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by " );
 			withinGroup.get( 0 ).accept( translator );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -103,15 +109,18 @@ public class ListaggFunction extends AbstractSqmSelfRenderingFunctionDescriptor
 				withinGroup.get( i ).accept( translator );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 		else if ( emptyWithinReplacement != null ) {
 			sqlAppender.appendSql( ' ' );
 			sqlAppender.appendSql( emptyWithinReplacement );
 		}
 		if ( !caseWrapper && filter != null ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/ListaggGroupConcatEmulation.java

@@ -13,7 +13,9 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -41,7 +43,8 @@ public class ListaggGroupConcatEmulation extends AbstractSqmSelfRenderingFunctio
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, STRING ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, STRING )
 		);
 	}
 
@@ -81,22 +84,26 @@ public class ListaggGroupConcatEmulation extends AbstractSqmSelfRenderingFunctio
 			arg = (Expression) firstArg;
 		}
 		if ( caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( "case when " );
 			filter.accept( translator );
 			sqlAppender.appendSql( " then " );
 			arg.accept( translator );
 			sqlAppender.appendSql( " else null end" );
+			translator.getCurrentClauseStack().pop();
 		}
 		else {
 			arg.accept( translator );
 		}
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " order by " );
 			withinGroup.get( 0 ).accept( translator );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
 				sqlAppender.appendSql( ',' );
 				withinGroup.get( i ).accept( translator );
 			}
+			translator.getCurrentClauseStack().pop();
 		}
 		if ( sqlAstArguments.size() != 1 ) {
 			SqlAstNode separator = sqlAstArguments.get( 1 );
@@ -109,9 +116,11 @@ public class ListaggGroupConcatEmulation extends AbstractSqmSelfRenderingFunctio
 		}
 		sqlAppender.appendSql( ')' );
 		if ( !caseWrapper && filter != null ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/ListaggStringAggEmulation.java

@@ -15,7 +15,9 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -51,7 +53,8 @@ public class ListaggStringAggEmulation extends AbstractSqmSelfRenderingFunctionD
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, STRING ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, STRING )
 		);
 		this.functionName = functionName;
 		this.stringType = stringType;
@@ -95,11 +98,13 @@ public class ListaggStringAggEmulation extends AbstractSqmSelfRenderingFunctionD
 			arg = (Expression) firstArg;
 		}
 		if ( caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( "case when " );
 			filter.accept( translator );
 			sqlAppender.appendSql( " then " );
 			renderAsString( sqlAppender, translator, arg );
 			sqlAppender.appendSql( " else null end" );
+			translator.getCurrentClauseStack().pop();
 		}
 		else {
 			renderAsString( sqlAppender, translator, arg );
@@ -113,16 +118,19 @@ public class ListaggStringAggEmulation extends AbstractSqmSelfRenderingFunctionD
 			sqlAppender.appendSql( ',' );
 			separator.accept( translator );
 			if ( !withinGroupClause && withinGroup != null && !withinGroup.isEmpty() ) {
+				translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 				sqlAppender.appendSql( " order by " );
 				withinGroup.get( 0 ).accept( translator );
 				for ( int i = 1; i < withinGroup.size(); i++ ) {
 					sqlAppender.appendSql( ',' );
 					withinGroup.get( i ).accept( translator );
 				}
+				translator.getCurrentClauseStack().pop();
 			}
 		}
 		sqlAppender.appendSql( ')' );
 		if ( withinGroupClause && withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by " );
 			withinGroup.get( 0 ).accept( translator );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -130,11 +138,14 @@ public class ListaggStringAggEmulation extends AbstractSqmSelfRenderingFunctionD
 				withinGroup.get( i ).accept( translator );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 		if ( !caseWrapper && filter != null ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/LocatePositionEmulation.java

@@ -12,6 +12,7 @@ import org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor;
 import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.type.StandardBasicTypes;
@@ -34,7 +35,8 @@ public class LocatePositionEmulation extends AbstractSqmFunctionDescriptor {
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 2 ), STRING, STRING ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.INTEGER )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, STRING )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/LpadRpadPadEmulation.java

@@ -13,6 +13,7 @@ import org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor;
 import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.expression.SqmTrimSpecification;
@@ -47,7 +48,8 @@ public class LpadRpadPadEmulation
 				),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, STRING, INTEGER, TRIM_SPEC, STRING )
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/MinMaxCaseEveryAnyEmulation.java

@@ -13,7 +13,9 @@ import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -41,7 +43,8 @@ public class MinMaxCaseEveryAnyEmulation extends AbstractSqmSelfRenderingFunctio
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 1 ), FunctionParameterType.BOOLEAN ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, FunctionParameterType.BOOLEAN )
 		);
 		this.every = every;
 	}
@@ -59,7 +62,9 @@ public class MinMaxCaseEveryAnyEmulation extends AbstractSqmSelfRenderingFunctio
 			sqlAppender.appendSql( "max(case when " );
 		}
 		if ( filter != null ) {
+			walker.getCurrentClauseStack().push( Clause.WHERE );
 			filter.accept( walker );
+			walker.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then case when " );
 			sqlAstArguments.get( 0 ).accept( walker );
 			sqlAppender.appendSql( " then 1 else 0 end else null end)" );

hibernate-core/src/main/java/org/hibernate/dialect/function/ModeStatsModeEmulation.java

@@ -8,6 +8,7 @@ package org.hibernate.dialect.function;
 
 import java.util.List;
 
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -43,19 +44,27 @@ public class ModeStatsModeEmulation extends InverseDistributionFunction {
 			throw new IllegalArgumentException( "MODE function requires a WITHIN GROUP clause with exactly one order by item!" );
 		}
 		if ( caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( "case when " );
 			filter.accept( translator );
+			translator.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( " then " );
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			withinGroup.get( 0 ).accept( translator );
 			sqlAppender.appendSql( " else null end)" );
+			translator.getCurrentClauseStack().pop();
 		}
 		else {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			withinGroup.get( 0 ).accept( translator );
+			translator.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( ')' );
 			if ( filter != null ) {
+				translator.getCurrentClauseStack().push( Clause.WHERE );
 				sqlAppender.appendSql( " filter (where " );
 				filter.accept( translator );
 				sqlAppender.appendSql( ')' );
+				translator.getCurrentClauseStack().pop();
 			}
 		}
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/NvlCoalesceEmulation.java

@@ -12,6 +12,7 @@ import org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor;
 import org.hibernate.query.sqm.function.SelfRenderingSqmFunction;
 import org.hibernate.query.sqm.function.SqmFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.expression.SqmExpression;
@@ -35,7 +36,8 @@ public class NvlCoalesceEmulation
 		super(
 				"coalesce",
 				StandardArgumentsValidators.min( 2 ),
-				StandardFunctionReturnTypeResolvers.useFirstNonNull()
+				StandardFunctionReturnTypeResolvers.useFirstNonNull(),
+				StandardFunctionArgumentTypeResolvers.IMPLIED_RESULT_TYPE
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/QuantifiedLeastGreatestEmulation.java

@@ -11,6 +11,7 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -32,7 +33,8 @@ public class QuantifiedLeastGreatestEmulation
 		super(
 				least ? "least" : "greatest",
 				new ArgumentTypesValidator( StandardArgumentsValidators.min( 2 ), COMPARABLE, COMPARABLE ),
-				StandardFunctionReturnTypeResolvers.useFirstNonNull()
+				StandardFunctionReturnTypeResolvers.useFirstNonNull(),
+				StandardFunctionArgumentTypeResolvers.ARGUMENT_OR_IMPLIED_RESULT_TYPE
 		);
 		this.operator = least ? "<=" : ">=";
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/SQLServerEveryAnyEmulation.java

@@ -11,8 +11,11 @@ import java.util.List;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.function.FunctionKind;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
+import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
@@ -42,7 +45,8 @@ public class SQLServerEveryAnyEmulation extends AbstractSqmSelfRenderingFunction
 				new ArgumentTypesValidator( StandardArgumentsValidators.exactly( 1 ), BOOLEAN ),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.BOOLEAN )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, FunctionParameterType.BOOLEAN )
 		);
 		this.every = every;
 	}
@@ -60,7 +64,9 @@ public class SQLServerEveryAnyEmulation extends AbstractSqmSelfRenderingFunction
 			sqlAppender.appendSql( "max(iif(" );
 		}
 		if ( filter != null ) {
+			walker.getCurrentClauseStack().push( Clause.WHERE );
 			filter.accept( walker );
+			walker.getCurrentClauseStack().pop();
 			sqlAppender.appendSql( ",iif(" );
 			sqlAstArguments.get( 0 ).accept( walker );
 			sqlAppender.appendSql( ",1,0),null))" );

hibernate-core/src/main/java/org/hibernate/dialect/function/SQLServerFormatEmulation.java

@@ -11,6 +11,7 @@ import jakarta.persistence.TemporalType;
 
 import org.hibernate.dialect.SQLServerDialect;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -20,6 +21,9 @@ import org.hibernate.sql.ast.tree.expression.Format;
 import org.hibernate.type.StandardBasicTypes;
 import org.hibernate.type.spi.TypeConfiguration;
 
+import static org.hibernate.query.sqm.produce.function.FunctionParameterType.STRING;
+import static org.hibernate.query.sqm.produce.function.FunctionParameterType.TEMPORAL;
+
 /**
  * SQL Server behaves strangely when the first argument to format is of the type time, so we cast to datetime.
  *
@@ -35,7 +39,8 @@ public class SQLServerFormatEmulation extends AbstractSqmSelfRenderingFunctionDe
 				CommonFunctionFactory.formatValidator(),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TEMPORAL, STRING )
 		);
 		this.dialect = dialect;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/SqlFunction.java

@@ -29,7 +29,8 @@ public class SqlFunction
 		super(
 				"sql",
 				StandardArgumentsValidators.min( 1 ),
-				StandardFunctionReturnTypeResolvers.invariant( JavaObjectType.INSTANCE )
+				StandardFunctionReturnTypeResolvers.invariant( JavaObjectType.INSTANCE ),
+				null
 		);
 	}
 

hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampaddFunction.java

@@ -15,6 +15,7 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.SelfRenderingFunctionSqlAstExpression;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -22,6 +23,7 @@ import org.hibernate.sql.ast.spi.SqlAppender;
 import org.hibernate.sql.ast.tree.SqlAstNode;
 import org.hibernate.sql.ast.tree.expression.DurationUnit;
 import org.hibernate.sql.ast.tree.expression.Expression;
+import org.hibernate.type.spi.TypeConfiguration;
 
 import java.util.List;
 
@@ -46,14 +48,15 @@ public class TimestampaddFunction
 
 	private final Dialect dialect;
 
-	public TimestampaddFunction(Dialect dialect) {
+	public TimestampaddFunction(Dialect dialect, TypeConfiguration typeConfiguration) {
 		super(
 				"timestampadd",
 				new ArgumentTypesValidator(
 						StandardArgumentsValidators.exactly( 3 ),
 						TEMPORAL_UNIT, INTEGER, TEMPORAL
 				),
-				StandardFunctionReturnTypeResolvers.useArgType( 3 )
+				StandardFunctionReturnTypeResolvers.useArgType( 3 ),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TEMPORAL_UNIT, INTEGER, TEMPORAL )
 		);
 		this.dialect = dialect;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampdiffFunction.java

@@ -8,7 +8,6 @@ package org.hibernate.dialect.function;
 
 import java.util.List;
 
-import jakarta.persistence.TemporalType;
 import org.hibernate.dialect.Dialect;
 import org.hibernate.query.ReturnableType;
 import org.hibernate.query.sqm.TemporalUnit;
@@ -16,6 +15,7 @@ import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescript
 import org.hibernate.query.sqm.function.SelfRenderingFunctionSqlAstExpression;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -26,6 +26,8 @@ import org.hibernate.sql.ast.tree.expression.Expression;
 import org.hibernate.type.StandardBasicTypes;
 import org.hibernate.type.spi.TypeConfiguration;
 
+import jakarta.persistence.TemporalType;
+
 import static java.util.Arrays.asList;
 import static org.hibernate.query.sqm.produce.function.FunctionParameterType.TEMPORAL;
 import static org.hibernate.query.sqm.produce.function.FunctionParameterType.TEMPORAL_UNIT;
@@ -54,7 +56,8 @@ public class TimestampdiffFunction
 				),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.LONG )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TEMPORAL_UNIT, TEMPORAL, TEMPORAL )
 		);
 		this.dialect = dialect;
 	}

hibernate-core/src/main/java/org/hibernate/dialect/function/TrimFunction.java

@@ -11,6 +11,7 @@ import org.hibernate.query.sqm.TrimSpec;
 import org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
 import org.hibernate.sql.ast.SqlAstTranslator;
@@ -50,7 +51,8 @@ public class TrimFunction extends AbstractSqmSelfRenderingFunctionDescriptor {
 				),
 				StandardFunctionReturnTypeResolvers.invariant(
 						typeConfiguration.getBasicTypeRegistry().resolve( StandardBasicTypes.STRING )
-				)
+				),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, TRIM_SPEC, STRING, STRING )
 		);
 		this.dialect = dialect;
 	}

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

@@ -3191,7 +3191,8 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 					null,
 					StandardFunctionReturnTypeResolvers.invariant(
 							resolveExpressibleTypeBasic( Object.class )
-					)
+					),
+					null
 			);
 		}
 		return functionTemplate.generateSqmExpression(
@@ -3262,6 +3263,7 @@ public class SemanticQueryBuilder<R> extends HqlParserBaseVisitor<Object> implem
 					StandardFunctionReturnTypeResolvers.invariant(
 							resolveExpressibleTypeBasic( Object.class )
 					),
+					null,
 					functionName,
 					functionKind,
 					null,

hibernate-core/src/main/java/org/hibernate/query/sqm/function/AbstractSqmFunctionDescriptor.java

@@ -6,45 +6,52 @@
  */
 package org.hibernate.query.sqm.function;
 
+import java.util.List;
+
 import org.hibernate.query.ReturnableType;
 import org.hibernate.query.spi.QueryEngine;
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
+import org.hibernate.query.sqm.produce.function.FunctionArgumentTypeResolver;
 import org.hibernate.query.sqm.produce.function.FunctionReturnTypeResolver;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
-import org.hibernate.query.sqm.sql.SqmToSqlAstConverter;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
-import org.hibernate.query.sqm.tree.SqmVisitableNode;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.query.sqm.tree.select.SqmOrderByClause;
-import org.hibernate.sql.ast.tree.SqlAstNode;
 import org.hibernate.type.spi.TypeConfiguration;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import static java.util.Collections.emptyList;
-
 /**
  * @author Steve Ebersole
  */
 public abstract class AbstractSqmFunctionDescriptor implements SqmFunctionDescriptor {
 	private final ArgumentsValidator argumentsValidator;
 	private final FunctionReturnTypeResolver returnTypeResolver;
+	private final FunctionArgumentTypeResolver functionArgumentTypeResolver;
 	private final String name;
 
 	public AbstractSqmFunctionDescriptor(String name) {
-		this( name, null, null );
+		this( name, null, null, null );
 	}
 
-	public AbstractSqmFunctionDescriptor(String name, ArgumentsValidator argumentsValidator) {
+	public AbstractSqmFunctionDescriptor(
-		this( name, argumentsValidator, null );
+			String name,
+			ArgumentsValidator argumentsValidator) {
+		this( name, argumentsValidator, null, null );
 	}
 
 	public AbstractSqmFunctionDescriptor(
 			String name,
 			ArgumentsValidator argumentsValidator,
-			FunctionReturnTypeResolver returnTypeResolver) {
+			FunctionArgumentTypeResolver argumentTypeResolver) {
+		this( name, argumentsValidator, null, argumentTypeResolver );
+	}
+
+	public AbstractSqmFunctionDescriptor(
+			String name,
+			ArgumentsValidator argumentsValidator,
+			FunctionReturnTypeResolver returnTypeResolver,
+			FunctionArgumentTypeResolver argumentTypeResolver) {
 		this.name = name;
 		this.argumentsValidator = argumentsValidator == null
 				? StandardArgumentsValidators.NONE
@@ -52,6 +59,9 @@ public abstract class AbstractSqmFunctionDescriptor implements SqmFunctionDescri
 		this.returnTypeResolver = returnTypeResolver == null
 				? StandardFunctionReturnTypeResolvers.useFirstNonNull()
 				: returnTypeResolver;
+		this.functionArgumentTypeResolver = argumentTypeResolver == null
+				? StandardFunctionArgumentTypeResolvers.NULL
+				: argumentTypeResolver;
 	}
 
 	public String getName() {
@@ -71,6 +81,10 @@ public abstract class AbstractSqmFunctionDescriptor implements SqmFunctionDescri
 		return returnTypeResolver;
 	}
 
+	public FunctionArgumentTypeResolver getArgumentTypeResolver() {
+		return functionArgumentTypeResolver;
+	}
+
 	public String getReturnSignature() {
 		String result = returnTypeResolver.getReturnType();
 		return result.isEmpty() ? "" : result + " ";
@@ -81,23 +95,6 @@ public abstract class AbstractSqmFunctionDescriptor implements SqmFunctionDescri
 		return alwaysIncludesParentheses() ? args : "()".equals(args) ? "" : "[" + args + "]";
 	}
 
-	private static SqlAstNode toSqlAstNode(Object arg, SqmToSqlAstConverter walker) {
-		return (SqlAstNode) arg;
-	}
-
-
-	public static List<SqlAstNode> resolveSqlAstArguments(List<? extends SqmTypedNode<?>> sqmArguments, SqmToSqlAstConverter walker) {
-		if ( sqmArguments == null || sqmArguments.isEmpty() ) {
-			return emptyList();
-		}
-
-		final ArrayList<SqlAstNode> sqlAstArguments = new ArrayList<>();
-		for ( SqmTypedNode<?> sqmArgument : sqmArguments ) {
-			sqlAstArguments.add( toSqlAstNode( ((SqmVisitableNode) sqmArgument).accept( walker ), walker ) );
-		}
-		return sqlAstArguments;
-	}
-
 	@Override
 	public final <T> SelfRenderingSqmFunction<T> generateSqmExpression(
 			List<? extends SqmTypedNode<?>> arguments,

hibernate-core/src/main/java/org/hibernate/query/sqm/function/AbstractSqmSelfRenderingFunctionDescriptor.java

@@ -9,6 +9,7 @@ package org.hibernate.query.sqm.function;
 import org.hibernate.query.ReturnableType;
 import org.hibernate.query.spi.QueryEngine;
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
+import org.hibernate.query.sqm.produce.function.FunctionArgumentTypeResolver;
 import org.hibernate.query.sqm.produce.function.FunctionReturnTypeResolver;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
@@ -33,8 +34,9 @@ public abstract class AbstractSqmSelfRenderingFunctionDescriptor
 	public AbstractSqmSelfRenderingFunctionDescriptor(
 			String name,
 			ArgumentsValidator argumentsValidator,
-			FunctionReturnTypeResolver returnTypeResolver) {
+			FunctionReturnTypeResolver returnTypeResolver,
-		super( name, argumentsValidator, returnTypeResolver );
+			FunctionArgumentTypeResolver argumentTypeResolver) {
+		super( name, argumentsValidator, returnTypeResolver, argumentTypeResolver );
 		this.functionKind = FunctionKind.NORMAL;
 	}
 
@@ -42,8 +44,9 @@ public abstract class AbstractSqmSelfRenderingFunctionDescriptor
 			String name,
 			FunctionKind functionKind,
 			ArgumentsValidator argumentsValidator,
-			FunctionReturnTypeResolver returnTypeResolver) {
+			FunctionReturnTypeResolver returnTypeResolver,
-		super( name, argumentsValidator, returnTypeResolver );
+			FunctionArgumentTypeResolver argumentTypeResolver) {
+		super( name, argumentsValidator, returnTypeResolver, argumentTypeResolver );
 		this.functionKind = functionKind;
 	}
 

hibernate-core/src/main/java/org/hibernate/query/sqm/function/MultipatternSqmFunctionDescriptor.java

@@ -11,6 +11,7 @@ import org.hibernate.query.spi.QueryEngine;
 import org.hibernate.query.sqm.produce.function.ArgumentTypesValidator;
 import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.produce.function.StandardFunctionReturnTypeResolvers;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
 import org.hibernate.type.BasicType;
@@ -60,6 +61,7 @@ public class MultipatternSqmFunctionDescriptor extends AbstractSqmFunctionDescri
 			String name,
 			SqmFunctionDescriptor[] functions,
 			BasicType<?> type,
+			TypeConfiguration typeConfiguration,
 			FunctionParameterType... parameterTypes) {
 		super(
 				name,
@@ -70,7 +72,8 @@ public class MultipatternSqmFunctionDescriptor extends AbstractSqmFunctionDescri
 						),
 						parameterTypes
 				),
-				StandardFunctionReturnTypeResolvers.invariant( type )
+				StandardFunctionReturnTypeResolvers.invariant( type ),
+				StandardFunctionArgumentTypeResolvers.invariant( typeConfiguration, parameterTypes )
 		);
 		this.functions = functions;
 	}

hibernate-core/src/main/java/org/hibernate/query/sqm/function/NamedSqmFunctionDescriptor.java

@@ -7,7 +7,9 @@
 package org.hibernate.query.sqm.function;
 
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
+import org.hibernate.query.sqm.produce.function.FunctionArgumentTypeResolver;
 import org.hibernate.query.sqm.produce.function.FunctionReturnTypeResolver;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -47,6 +49,7 @@ public class NamedSqmFunctionDescriptor
 				useParenthesesWhenNoArgs,
 				argumentsValidator,
 				returnTypeResolver,
+				null,
 				functionName,
 				FunctionKind.NORMAL,
 				null,
@@ -59,11 +62,31 @@ public class NamedSqmFunctionDescriptor
 			boolean useParenthesesWhenNoArgs,
 			ArgumentsValidator argumentsValidator,
 			FunctionReturnTypeResolver returnTypeResolver,
+			FunctionArgumentTypeResolver argumentTypeResolver) {
+		this(
+				functionName,
+				useParenthesesWhenNoArgs,
+				argumentsValidator,
+				returnTypeResolver,
+				argumentTypeResolver,
+				functionName,
+				FunctionKind.NORMAL,
+				null,
+				SqlAstNodeRenderingMode.DEFAULT
+		);
+	}
+
+	public NamedSqmFunctionDescriptor(
+			String functionName,
+			boolean useParenthesesWhenNoArgs,
+			ArgumentsValidator argumentsValidator,
+			FunctionReturnTypeResolver returnTypeResolver,
+			FunctionArgumentTypeResolver argumentTypeResolver,
 			String name,
 			FunctionKind functionKind,
 			String argumentListSignature,
 			SqlAstNodeRenderingMode argumentRenderingMode) {
-		super( name, functionKind, argumentsValidator, returnTypeResolver );
+		super( name, functionKind, argumentsValidator, returnTypeResolver, argumentTypeResolver );
 
 		this.functionName = functionName;
 		this.useParenthesesWhenNoArgs = useParenthesesWhenNoArgs;
@@ -150,8 +173,10 @@ public class NamedSqmFunctionDescriptor
 				sqlAppender.appendSql( "," );
 			}
 			if ( caseWrapper && !( arg instanceof Distinct ) ) {
+				translator.getCurrentClauseStack().push( Clause.WHERE );
 				sqlAppender.appendSql( "case when " );
 				filter.accept( translator );
+				translator.getCurrentClauseStack().pop();
 				sqlAppender.appendSql( " then " );
 				if ( ( arg instanceof Star ) ) {
 					sqlAppender.appendSql( "1" );
@@ -172,6 +197,7 @@ public class NamedSqmFunctionDescriptor
 		}
 
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by" );
 			translator.render( withinGroup.get( 0 ), argumentRenderingMode );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -179,6 +205,7 @@ public class NamedSqmFunctionDescriptor
 				translator.render( withinGroup.get( 0 ), argumentRenderingMode );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 
 		if ( fromFirst != null ) {
@@ -199,9 +226,11 @@ public class NamedSqmFunctionDescriptor
 		}
 
 		if ( filter != null && !caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 

hibernate-core/src/main/java/org/hibernate/query/sqm/function/PatternBasedSqmFunctionDescriptor.java

@@ -7,6 +7,7 @@
 package org.hibernate.query.sqm.function;
 
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
+import org.hibernate.query.sqm.produce.function.FunctionArgumentTypeResolver;
 import org.hibernate.query.sqm.produce.function.FunctionReturnTypeResolver;
 import org.hibernate.query.sqm.produce.function.StandardArgumentsValidators;
 import org.hibernate.query.sqm.produce.function.internal.PatternRenderer;
@@ -48,6 +49,7 @@ public class PatternBasedSqmFunctionDescriptor
 			PatternRenderer renderer,
 			ArgumentsValidator argumentsValidator,
 			FunctionReturnTypeResolver returnTypeResolver,
+			FunctionArgumentTypeResolver argumentTypeResolver,
 			String name,
 			FunctionKind functionKind,
 			String argumentListSignature) {
@@ -63,7 +65,8 @@ public class PatternBasedSqmFunctionDescriptor
 						: renderer.hasVarargs()
 						? StandardArgumentsValidators.min( renderer.getParamCount() )
 						: StandardArgumentsValidators.exactly( renderer.getParamCount() ),
-					returnTypeResolver
+				returnTypeResolver,
+				argumentTypeResolver
 		);
 		this.renderer = renderer;
 		this.argumentListSignature = argumentListSignature;

hibernate-core/src/main/java/org/hibernate/query/sqm/function/SelfRenderingSqmFunction.java

@@ -8,6 +8,7 @@ package org.hibernate.query.sqm.function;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.function.Supplier;
 
 import org.hibernate.metamodel.mapping.BasicValuedMapping;
 import org.hibernate.metamodel.mapping.MappingModelExpressible;
@@ -16,7 +17,9 @@ import org.hibernate.query.ReturnableType;
 import org.hibernate.query.sqm.NodeBuilder;
 import org.hibernate.query.sqm.SqmExpressible;
 import org.hibernate.query.sqm.produce.function.ArgumentsValidator;
+import org.hibernate.query.sqm.produce.function.FunctionArgumentTypeResolver;
 import org.hibernate.query.sqm.produce.function.FunctionReturnTypeResolver;
+import org.hibernate.query.sqm.produce.function.StandardFunctionArgumentTypeResolvers;
 import org.hibernate.query.sqm.sql.SqmToSqlAstConverter;
 import org.hibernate.query.sqm.tree.SqmCopyContext;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
@@ -97,14 +100,38 @@ public class SelfRenderingSqmFunction<T> extends SqmFunction<T> {
 		return returnTypeResolver;
 	}
 
-	protected static List<SqlAstNode> resolveSqlAstArguments(List<? extends SqmTypedNode<?>> sqmArguments, SqmToSqlAstConverter walker) {
+	protected List<SqlAstNode> resolveSqlAstArguments(List<? extends SqmTypedNode<?>> sqmArguments, SqmToSqlAstConverter walker) {
 		if ( sqmArguments == null || sqmArguments.isEmpty() ) {
 			return emptyList();
 		}
 
+		final FunctionArgumentTypeResolver argumentTypeResolver;
+		if ( getFunctionDescriptor() instanceof AbstractSqmFunctionDescriptor ) {
+			argumentTypeResolver = ( (AbstractSqmFunctionDescriptor) getFunctionDescriptor() ).getArgumentTypeResolver();
+		}
+		else {
+			argumentTypeResolver = null;
+		}
+		if ( argumentTypeResolver == null ) {
 			final ArrayList<SqlAstNode> sqlAstArguments = new ArrayList<>( sqmArguments.size() );
-		for ( SqmTypedNode<?> sqmArgument : sqmArguments ) {
+			for ( int i = 0; i < sqmArguments.size(); i++ ) {
-			sqlAstArguments.add( (SqlAstNode) ( (SqmVisitableNode) sqmArgument ).accept( walker ) );
+				sqlAstArguments.add(
+						(SqlAstNode) ( (SqmVisitableNode) sqmArguments.get( i ) ).accept( walker )
+				);
+			}
+			return sqlAstArguments;
+		}
+		final FunctionArgumentTypeResolverTypeAccess typeAccess = new FunctionArgumentTypeResolverTypeAccess(
+				walker,
+				this,
+				argumentTypeResolver
+		);
+		final ArrayList<SqlAstNode> sqlAstArguments = new ArrayList<>( sqmArguments.size() );
+		for ( int i = 0; i < sqmArguments.size(); i++ ) {
+			typeAccess.argumentIndex = i;
+			sqlAstArguments.add(
+					(SqlAstNode) walker.visitWithInferredType( (SqmVisitableNode) sqmArguments.get( i ), typeAccess )
+			);
 		}
 		return sqlAstArguments;
 	}
@@ -184,4 +211,26 @@ public class SelfRenderingSqmFunction<T> extends SqmFunction<T> {
 		return mapping;
 	}
 
+	private static class FunctionArgumentTypeResolverTypeAccess implements Supplier<MappingModelExpressible<?>> {
+
+		private final SqmToSqlAstConverter converter;
+		private final SqmFunction<?> function;
+		private final FunctionArgumentTypeResolver argumentTypeResolver;
+		private int argumentIndex;
+
+		public FunctionArgumentTypeResolverTypeAccess(
+				SqmToSqlAstConverter converter,
+				SqmFunction<?> function,
+				FunctionArgumentTypeResolver argumentTypeResolver) {
+			this.converter = converter;
+			this.function = function;
+			this.argumentTypeResolver = argumentTypeResolver;
+		}
+
+		@Override
+		public MappingModelExpressible<?> get() {
+			return argumentTypeResolver.resolveFunctionArgumentType( function, argumentIndex, converter );
+		}
+	}
+
 }

hibernate-core/src/main/java/org/hibernate/query/sqm/function/SelfRenderingSqmOrderedSetAggregateFunction.java

@@ -107,7 +107,7 @@ public class SelfRenderingSqmOrderedSetAggregateFunction<T> extends SelfRenderin
 			withinGroup = Collections.emptyList();
 		}
 		else {
-			walker.getCurrentClauseStack().push( Clause.ORDER );
+			walker.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			try {
 				final List<SqmSortSpecification> sortSpecifications = this.withinGroup.getSortSpecifications();
 				withinGroup = new ArrayList<>( sortSpecifications.size() );

hibernate-core/src/main/java/org/hibernate/query/sqm/function/SqmFunctionRegistry.java

@@ -15,6 +15,7 @@ import org.hibernate.query.sqm.produce.function.FunctionParameterType;
 import org.hibernate.query.sqm.produce.function.NamedFunctionDescriptorBuilder;
 import org.hibernate.query.sqm.produce.function.PatternFunctionDescriptorBuilder;
 import org.hibernate.type.BasicType;
+import org.hibernate.type.spi.TypeConfiguration;
 
 import org.jboss.logging.Logger;
 
@@ -305,8 +306,16 @@ public class SqmFunctionRegistry {
 			BasicType type,
 			String pattern0,
 			String pattern1,
-			FunctionParameterType parameterType) {
+			FunctionParameterType parameterType,
-		return registerPatterns( name, type, new FunctionParameterType[]{parameterType}, pattern0, pattern1 );
+			TypeConfiguration typeConfiguration) {
+		return registerPatterns(
+				name,
+				type,
+				new FunctionParameterType[] { parameterType },
+				typeConfiguration,
+				pattern0,
+				pattern1
+		);
 	}
 
 	/**
@@ -320,10 +329,17 @@ public class SqmFunctionRegistry {
 			String pattern1,
 			String pattern2,
 			FunctionParameterType parameterType1,
-			FunctionParameterType parameterType2) {
+			FunctionParameterType parameterType2,
-		return registerPatterns( name, type,
+			TypeConfiguration typeConfiguration) {
-				new FunctionParameterType[]{parameterType1,parameterType2},
+		return registerPatterns(
-				null, pattern1, pattern2 );
+				name,
+				type,
+				new FunctionParameterType[] { parameterType1, parameterType2 },
+				typeConfiguration,
+				null,
+				pattern1,
+				pattern2
+		);
 	}
 
 	/**
@@ -338,10 +354,18 @@ public class SqmFunctionRegistry {
 			String pattern3,
 			FunctionParameterType parameterType1,
 			FunctionParameterType parameterType2,
-			FunctionParameterType parameterType3) {
+			FunctionParameterType parameterType3,
-		return registerPatterns( name, type,
+			TypeConfiguration typeConfiguration) {
-				new FunctionParameterType[]{parameterType1,parameterType2,parameterType3},
+		return registerPatterns(
-				null, null, pattern2, pattern3 );
+				name,
+				type,
+				new FunctionParameterType[] { parameterType1, parameterType2, parameterType3 },
+				typeConfiguration,
+				null,
+				null,
+				pattern2,
+				pattern3
+		);
 	}
 
 	/**
@@ -357,16 +381,31 @@ public class SqmFunctionRegistry {
 			FunctionParameterType parameterType1,
 			FunctionParameterType parameterType2,
 			FunctionParameterType parameterType3,
-			FunctionParameterType parameterType4) {
+			FunctionParameterType parameterType4,
-		return registerPatterns( name, type,
+			TypeConfiguration typeConfiguration) {
-				new FunctionParameterType[]{parameterType1,parameterType2,parameterType3, parameterType4},
+		return registerPatterns(
-				null, null, null, pattern3, pattern4 );
+				name,
+				type,
+				new FunctionParameterType[] {
+						parameterType1,
+						parameterType2,
+						parameterType3,
+						parameterType4
+				},
+				typeConfiguration,
+				null,
+				null,
+				null,
+				pattern3,
+				pattern4
+		);
 	}
 
 	private MultipatternSqmFunctionDescriptor registerPatterns(
 			String name,
 			BasicType<?> type,
 			FunctionParameterType[] parameterTypes,
+			TypeConfiguration typeConfiguration,
 			String... patterns) {
 		SqmFunctionDescriptor[] descriptors =
 				new SqmFunctionDescriptor[patterns.length];
@@ -383,7 +422,7 @@ public class SqmFunctionRegistry {
 		}
 
 		MultipatternSqmFunctionDescriptor function =
-				new MultipatternSqmFunctionDescriptor( name, descriptors, type, parameterTypes );
+				new MultipatternSqmFunctionDescriptor( name, descriptors, type, typeConfiguration, parameterTypes );
 		register( name, function );
 		return function;
 	}

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

@@ -1340,7 +1340,8 @@ public class SqmCriteriaNodeBuilder implements NodeBuilder, SqmCreationContext,
 					name,
 					true,
 					null,
-					StandardFunctionReturnTypeResolvers.invariant( resultType )
+					StandardFunctionReturnTypeResolvers.invariant( resultType ),
+					null
 			);
 		}
 

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

@@ -402,18 +402,18 @@ public class SqmUtil {
 			List<SqmParameter<?>> sqmParameters,
 			SqmParameterMappingModelResolutionAccess mappingModelResolutionAccess,
 			SessionFactoryImplementor sessionFactory) {
-		if ( binding.getType() != null ) {
+		if ( binding.getBindType() instanceof Bindable ) {
-			return binding.getType();
-		}
-
-		if ( binding.getBindType() != null && binding.getBindType() instanceof Bindable ) {
 			return (Bindable) binding.getBindType();
 		}
 
-		if ( parameter.getHibernateType() != null && parameter.getHibernateType() instanceof Bindable ) {
+		if ( parameter.getHibernateType() instanceof Bindable ) {
 			return (Bindable) parameter.getHibernateType();
 		}
 
+		if ( binding.getType() != null ) {
+			return binding.getType();
+		}
+
 		for ( int i = 0; i < sqmParameters.size(); i++ ) {
 			final MappingModelExpressible<?> mappingModelType = mappingModelResolutionAccess
 					.getResolvedMappingModelType( sqmParameters.get( i ) );
@@ -425,8 +425,7 @@ public class SqmUtil {
 		final TypeConfiguration typeConfiguration = sessionFactory.getTypeConfiguration();
 
 		// assume we have (or can create) a mapping for the parameter's Java type
-		BasicType basicType = typeConfiguration.standardBasicTypeForJavaType( parameter.getParameterType() );
+		return typeConfiguration.standardBasicTypeForJavaType( parameter.getParameterType() );
-		return basicType;
 	}
 
 	public static SqmStatement.ParameterResolutions resolveParameters(SqmStatement<?> statement) {

hibernate-core/src/main/java/org/hibernate/query/sqm/produce/function/FunctionArgumentTypeResolver.java

@@ -0,0 +1,32 @@
+/*
+ * 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.sqm.produce.function;
+
+import org.hibernate.metamodel.mapping.MappingModelExpressible;
+import org.hibernate.query.sqm.sql.SqmToSqlAstConverter;
+import org.hibernate.query.sqm.tree.expression.SqmFunction;
+
+/**
+ * Pluggable strategy for resolving a function argument type for a specific call.
+ *
+ * @author Christian Beikov
+ */
+public interface FunctionArgumentTypeResolver {
+	/**
+	 * Resolve the argument type for a function given its context-implied return type.
+	 * <p/>
+	 * NOTE : the _context-implied_ type is the type implied by where the function's
+	 * occurs in the query.  E.g., for an equality predicate (`something = some_function`)
+	 * the implied type would be defined by the type of `something`.
+	 *
+	 * @return The resolved type.
+	 */
+	MappingModelExpressible<?> resolveFunctionArgumentType(
+			SqmFunction<?> function,
+			int argumentIndex,
+			SqmToSqlAstConverter converter);
+}

hibernate-core/src/main/java/org/hibernate/query/sqm/produce/function/NamedFunctionDescriptorBuilder.java

@@ -26,6 +26,7 @@ public class NamedFunctionDescriptorBuilder {
 
 	private ArgumentsValidator argumentsValidator;
 	private FunctionReturnTypeResolver returnTypeResolver;
+	private FunctionArgumentTypeResolver argumentTypeResolver;
 
 	private boolean useParenthesesWhenNoArgs = true;
 	private String argumentListSignature;
@@ -47,6 +48,11 @@ public class NamedFunctionDescriptorBuilder {
 		return this;
 	}
 
+	public NamedFunctionDescriptorBuilder setArgumentTypeResolver(FunctionArgumentTypeResolver argumentTypeResolver) {
+		this.argumentTypeResolver = argumentTypeResolver;
+		return this;
+	}
+
 	public NamedFunctionDescriptorBuilder setArgumentCountBetween(int min, int max) {
 		return setArgumentsValidator( StandardArgumentsValidators.between( min, max ) );
 	}
@@ -71,6 +77,7 @@ public class NamedFunctionDescriptorBuilder {
 
 	public NamedFunctionDescriptorBuilder setParameterTypes(FunctionParameterType... types) {
 		setArgumentsValidator( new ArgumentTypesValidator(argumentsValidator, types) );
+		setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.invariant( types ) );
 		return this;
 	}
 
@@ -99,6 +106,7 @@ public class NamedFunctionDescriptorBuilder {
 				useParenthesesWhenNoArgs,
 				argumentsValidator,
 				returnTypeResolver,
+				argumentTypeResolver,
 				registrationKey,
 				functionKind,
 				argumentListSignature,

hibernate-core/src/main/java/org/hibernate/query/sqm/produce/function/PatternFunctionDescriptorBuilder.java

@@ -26,6 +26,7 @@ public class PatternFunctionDescriptorBuilder {
 
 	private ArgumentsValidator argumentsValidator;
 	private FunctionReturnTypeResolver returnTypeResolver;
+	private FunctionArgumentTypeResolver argumentTypeResolver;
 	private SqlAstNodeRenderingMode argumentRenderingMode = SqlAstNodeRenderingMode.DEFAULT;
 
 	public PatternFunctionDescriptorBuilder(
@@ -44,8 +45,14 @@ public class PatternFunctionDescriptorBuilder {
 		return this;
 	}
 
+	public PatternFunctionDescriptorBuilder setArgumentTypeResolver(FunctionArgumentTypeResolver argumentTypeResolver) {
+		this.argumentTypeResolver = argumentTypeResolver;
+		return this;
+	}
+
 	public PatternFunctionDescriptorBuilder setParameterTypes(FunctionParameterType... types) {
 		setArgumentsValidator( new ArgumentTypesValidator(argumentsValidator, types) );
+		setArgumentTypeResolver( StandardFunctionArgumentTypeResolvers.invariant( types ) );
 		return this;
 	}
 
@@ -62,7 +69,7 @@ public class PatternFunctionDescriptorBuilder {
 		return this;
 	}
 
-	public PatternFunctionDescriptorBuilder setInvariantType(BasicType invariantType) {
+	public PatternFunctionDescriptorBuilder setInvariantType(BasicType<?> invariantType) {
 		setReturnTypeResolver( StandardFunctionReturnTypeResolvers.invariant( invariantType ) );
 		return this;
 	}
@@ -86,6 +93,7 @@ public class PatternFunctionDescriptorBuilder {
 				new PatternRenderer( pattern, argumentRenderingMode ),
 				argumentsValidator,
 				returnTypeResolver,
+				argumentTypeResolver,
 				registrationKey,
 				functionKind,
 				argumentListSignature

hibernate-core/src/main/java/org/hibernate/query/sqm/produce/function/StandardFunctionArgumentTypeResolvers.java

@@ -0,0 +1,161 @@
+/*
+ * 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.sqm.produce.function;
+
+import java.math.BigDecimal;
+import java.sql.Date;
+import java.sql.Time;
+import java.sql.Timestamp;
+import java.util.List;
+
+import org.hibernate.metamodel.mapping.MappingModelExpressible;
+import org.hibernate.query.sqm.tree.SqmTypedNode;
+import org.hibernate.query.sqm.tree.expression.SqmExpression;
+import org.hibernate.type.spi.TypeConfiguration;
+
+/**
+ * @author Christian Beikov
+ */
+public final class StandardFunctionArgumentTypeResolvers {
+	/**
+	 * Disallow instantiation
+	 */
+	private StandardFunctionArgumentTypeResolvers() {
+	}
+
+	public static final FunctionArgumentTypeResolver NULL = (function, argumentIndex, converter) -> {
+		return null;
+	};
+
+	public static final FunctionArgumentTypeResolver IMPLIED_RESULT_TYPE = (function, argumentIndex, converter) -> {
+		return converter.resolveFunctionImpliedReturnType();
+	};
+
+	public static final FunctionArgumentTypeResolver ARGUMENT_OR_IMPLIED_RESULT_TYPE = (function, argumentIndex, converter) -> {
+		final List<? extends SqmTypedNode<?>> arguments = function.getArguments();
+		final int argumentsSize = arguments.size();
+		for ( int i = 0 ; i < argumentIndex; i++ ) {
+			final SqmTypedNode<?> node = arguments.get( i );
+			if ( node instanceof SqmExpression<?> ) {
+				final MappingModelExpressible<?> expressible = converter.determineValueMapping( (SqmExpression<?>) node );
+				if ( expressible != null ) {
+					return expressible;
+				}
+			}
+		}
+		for ( int i = argumentIndex + 1 ; i < argumentsSize; i++ ) {
+			final SqmTypedNode<?> node = arguments.get( i );
+			if ( node instanceof SqmExpression<?> ) {
+				final MappingModelExpressible<?> expressible = converter.determineValueMapping( (SqmExpression<?>) node );
+				if ( expressible != null ) {
+					return expressible;
+				}
+			}
+		}
+
+		return converter.resolveFunctionImpliedReturnType();
+	};
+
+	public static FunctionArgumentTypeResolver invariant(
+			TypeConfiguration typeConfiguration,
+			FunctionParameterType type) {
+		final MappingModelExpressible<?> expressible = getMappingModelExpressible( typeConfiguration, type );
+		return (function, argumentIndex, converter) -> expressible;
+	}
+
+	public static FunctionArgumentTypeResolver invariant(
+			TypeConfiguration typeConfiguration,
+			FunctionParameterType... types) {
+		final MappingModelExpressible<?>[] expressibles = new MappingModelExpressible[types.length];
+		for ( int i = 0; i < types.length; i++ ) {
+			expressibles[i] = getMappingModelExpressible( typeConfiguration, types[i] );
+		}
+
+		return (function, argumentIndex, converter) -> expressibles[argumentIndex];
+	}
+
+	public static FunctionArgumentTypeResolver invariant(FunctionParameterType... types) {
+		return (function, argumentIndex, converter) -> getMappingModelExpressible(
+				function.nodeBuilder().getTypeConfiguration(),
+				types[argumentIndex]
+		);
+	}
+
+	public static FunctionArgumentTypeResolver impliedOrInvariant(
+			TypeConfiguration typeConfiguration,
+			FunctionParameterType type) {
+		final MappingModelExpressible<?> expressible = getMappingModelExpressible( typeConfiguration, type );
+		return (function, argumentIndex, converter) -> {
+			final MappingModelExpressible<?> mappingModelExpressible = converter.resolveFunctionImpliedReturnType();
+			if ( mappingModelExpressible != null ) {
+				return mappingModelExpressible;
+			}
+			return expressible;
+		};
+	}
+
+	public static FunctionArgumentTypeResolver argumentsOrImplied(int... indices) {
+		return (function, argumentIndex, converter) -> {
+			final List<? extends SqmTypedNode<?>> arguments = function.getArguments();
+			final int argumentsSize = arguments.size();
+			for ( int index : indices ) {
+				if ( index >= argumentIndex || index >= argumentsSize ) {
+					break;
+				}
+				final SqmTypedNode<?> node = arguments.get( index );
+				if ( node instanceof SqmExpression<?> ) {
+					final MappingModelExpressible<?> expressible = converter.determineValueMapping( (SqmExpression<?>) node );
+					if ( expressible != null ) {
+						return expressible;
+					}
+				}
+			}
+			for ( int index : indices ) {
+				if ( index <= argumentIndex || index >= argumentsSize ) {
+					break;
+				}
+				final SqmTypedNode<?> node = arguments.get( index );
+				if ( node instanceof SqmExpression<?> ) {
+					final MappingModelExpressible<?> expressible = converter.determineValueMapping( (SqmExpression<?>) node );
+					if ( expressible != null ) {
+						return expressible;
+					}
+				}
+			}
+
+			return converter.resolveFunctionImpliedReturnType();
+		};
+	}
+
+	public static FunctionArgumentTypeResolver composite(FunctionArgumentTypeResolver... resolvers) {
+		return (function, argumentIndex, converter) -> {
+			return resolvers[argumentIndex].resolveFunctionArgumentType( function, argumentIndex, converter );
+		};
+	}
+
+	private static MappingModelExpressible<?> getMappingModelExpressible(
+			TypeConfiguration typeConfiguration,
+			FunctionParameterType type) {
+		switch ( type ) {
+			case STRING:
+				return typeConfiguration.getBasicTypeForJavaType( String.class );
+			case NUMERIC:
+				return typeConfiguration.getBasicTypeForJavaType( BigDecimal.class );
+			case INTEGER:
+				return typeConfiguration.getBasicTypeForJavaType( Integer.class );
+			case TEMPORAL:
+				return typeConfiguration.getBasicTypeForJavaType( Timestamp.class );
+			case DATE:
+				return typeConfiguration.getBasicTypeForJavaType( Date.class );
+			case TIME:
+				return typeConfiguration.getBasicTypeForJavaType( Time.class );
+			case BOOLEAN:
+				return typeConfiguration.getBasicTypeForJavaType( Boolean.class );
+		}
+		return null;
+	}
+}

hibernate-core/src/main/java/org/hibernate/query/sqm/produce/function/internal/PatternRenderer.java

@@ -8,6 +8,7 @@ package org.hibernate.query.sqm.produce.function.internal;
 
 import org.hibernate.internal.CoreLogging;
 import org.hibernate.internal.CoreMessageLogger;
+import org.hibernate.sql.ast.Clause;
 import org.hibernate.sql.ast.SqlAstNodeRenderingMode;
 import org.hibernate.sql.ast.SqlAstTranslator;
 import org.hibernate.sql.ast.spi.SqlAppender;
@@ -189,8 +190,10 @@ public class PatternRenderer {
 					if ( arg != null ) {
 						sqlAppender.appendSql( chunks[i] );
 						if ( caseWrapper && !( arg instanceof Distinct ) && !( arg instanceof Star ) ) {
+							translator.getCurrentClauseStack().push( Clause.WHERE );
 							sqlAppender.appendSql( "case when " );
 							filter.accept( translator );
+							translator.getCurrentClauseStack().pop();
 							sqlAppender.appendSql( " then " );
 							translator.render( arg, argumentRenderingMode );
 							sqlAppender.appendSql( " else null end" );
@@ -209,8 +212,10 @@ public class PatternRenderer {
 				}
 				if ( arg != null ) {
 					if ( caseWrapper && !( arg instanceof Distinct ) && !( arg instanceof Star ) ) {
+						translator.getCurrentClauseStack().push( Clause.WHERE );
 						sqlAppender.appendSql( "case when " );
 						filter.accept( translator );
+						translator.getCurrentClauseStack().pop();
 						sqlAppender.appendSql( " then " );
 						translator.render( arg, argumentRenderingMode );
 						sqlAppender.appendSql( " else null end" );
@@ -226,6 +231,7 @@ public class PatternRenderer {
 		}
 
 		if ( withinGroup != null && !withinGroup.isEmpty() ) {
+			translator.getCurrentClauseStack().push( Clause.WITHIN_GROUP );
 			sqlAppender.appendSql( " within group (order by" );
 			translator.render( withinGroup.get( 0 ), argumentRenderingMode );
 			for ( int i = 1; i < withinGroup.size(); i++ ) {
@@ -233,6 +239,7 @@ public class PatternRenderer {
 				translator.render( withinGroup.get( 0 ), argumentRenderingMode );
 			}
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 
 		if ( fromFirst != null ) {
@@ -253,9 +260,11 @@ public class PatternRenderer {
 		}
 
 		if ( filter != null && !caseWrapper ) {
+			translator.getCurrentClauseStack().push( Clause.WHERE );
 			sqlAppender.appendSql( " filter (where " );
 			filter.accept( translator );
 			sqlAppender.appendSql( ')' );
+			translator.getCurrentClauseStack().pop();
 		}
 	}
 }

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java

@@ -140,6 +140,7 @@ import org.hibernate.query.sqm.sql.internal.SqmPathInterpretation;
 import org.hibernate.query.sqm.tree.SqmJoinType;
 import org.hibernate.query.sqm.tree.SqmStatement;
 import org.hibernate.query.sqm.tree.SqmTypedNode;
+import org.hibernate.query.sqm.tree.SqmVisitableNode;
 import org.hibernate.query.sqm.tree.cte.SqmCteContainer;
 import org.hibernate.query.sqm.tree.cte.SqmCteStatement;
 import org.hibernate.query.sqm.tree.cte.SqmCteTable;
@@ -393,6 +394,8 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 	private final QueryOptions queryOptions;
 	private final LoadQueryInfluencers loadQueryInfluencers;
 
+	private final Map<SqmParameter<?>, List<List<JdbcParameter>>> jdbcParamsBySqmParam = new IdentityHashMap<>();
+	private final JdbcParameters jdbcParameters = new JdbcParametersImpl();
 	private final DomainParameterXref domainParameterXref;
 	private final QueryParameterBindings domainParameterBindings;
 	private final Map<SqmParameter<?>, MappingModelExpressible<?>> sqmParameterMappingModelTypes = new LinkedHashMap<>();
@@ -407,6 +410,7 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 	private ForeignKeyDescriptor.Nature currentlyResolvingForeignKeySide;
 	private SqmQueryPart<?> currentSqmQueryPart;
 	private boolean containsCollectionFetches;
+	private boolean trackSelectionsForGroup;
 
 	private final Map<String, PredicateCollector> collectionFilterPredicates = new HashMap<>();
 	private List<Map.Entry<OrderByFragment, TableGroup>> orderByFragments;
@@ -436,6 +440,7 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 	);
 	private final Stack<List<QueryTransformer>> queryTransformers = new StandardStack<>();
 	private boolean inTypeInference;
+	private Supplier<MappingModelExpressible<?>> functionImpliedResultTypeAccess;
 
 	private SqmByUnit appliedByUnit;
 	private Expression adjustedTimestamp;
@@ -1573,8 +1578,6 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		return cteContainer;
 	}
 
-	private boolean trackSelectionsForGroup;
-
 	@Override
 	public QueryPart visitQueryPart(SqmQueryPart<?> queryPart) {
 		return (QueryPart) super.visitQueryPart( queryPart );
@@ -4079,6 +4082,17 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		return inferredType;
 	}
 
+	@Override
+	public MappingModelExpressible<?> resolveFunctionImpliedReturnType() {
+		if ( inTypeInference || functionImpliedResultTypeAccess == null ) {
+			return null;
+		}
+		inTypeInference = true;
+		final MappingModelExpressible<?> inferredType = functionImpliedResultTypeAccess.get();
+		inTypeInference = false;
+		return inferredType;
+	}
+
 	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 	// General expressions
 
@@ -4284,9 +4298,6 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		}
 	}
 
-	private final Map<SqmParameter<?>, List<List<JdbcParameter>>> jdbcParamsBySqmParam = new IdentityHashMap<>();
-	private final JdbcParameters jdbcParameters = new JdbcParametersImpl();
-
 	@Override
 	public Map<SqmParameter<?>, List<List<JdbcParameter>>> getJdbcParamsBySqmParam() {
 		return jdbcParamsBySqmParam;
@@ -4434,7 +4445,8 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		);
 	}
 
-	protected MappingModelExpressible<?> determineValueMapping(SqmExpression<?> sqmExpression) {
+	@Override
+	public MappingModelExpressible<?> determineValueMapping(SqmExpression<?> sqmExpression) {
 		if ( sqmExpression instanceof SqmParameter ) {
 			return determineValueMapping( (SqmParameter<?>) sqmExpression );
 		}
@@ -4562,16 +4574,6 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		final QueryParameterImplementor<?> queryParameter = domainParameterXref.getQueryParameter( sqmParameter );
 		final QueryParameterBinding<?> binding = domainParameterBindings.getBinding( queryParameter );
 
-		if ( sqmParameter.getAnticipatedType() == null ) {
-			// this should indicate the condition that the user query did not define an
-			// explicit type in regard to this parameter.  Here we should prefer the
-			// inferrable type and fallback to the binding type
-			final MappingModelExpressible<?> inferredValueMapping = getInferredValueMapping();
-			if ( inferredValueMapping != null ) {
-				return inferredValueMapping;
-			}
-		}
-
 		BindableType<?> paramType = binding.getBindType();
 		if ( paramType == null ) {
 			paramType = queryParameter.getHibernateType();
@@ -4581,12 +4583,25 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		}
 
 		if ( paramType == null ) {
+			final MappingModelExpressible<?> inferredValueMapping = getInferredValueMapping();
+			if ( inferredValueMapping != null ) {
+				return inferredValueMapping;
+			}
 			// Default to the Object type
 			return basicType( Object.class );
 		}
-		else if ( paramType instanceof MappingModelExpressible<?> && paramType.getBindableJavaType() == Object.class ) {
+		else if ( paramType instanceof MappingModelExpressible<?> ) {
 			return (MappingModelExpressible<?>) paramType;
 		}
+		else if ( sqmParameter.getAnticipatedType() == null ) {
+			// this should indicate the condition that the user query did not define an
+			// explicit type in regard to this parameter.  Here we should prefer the
+			// inferrable type and fallback to resolving the binding type
+			final MappingModelExpressible<?> inferredValueMapping = getInferredValueMapping();
+			if ( inferredValueMapping != null ) {
+				return inferredValueMapping;
+			}
+		}
 
 		final SqmExpressible<?> paramSqmType = paramType.resolveExpressible( creationContext.getSessionFactory() );
 
@@ -4742,12 +4757,15 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 
 	@Override
 	public Expression visitFunction(SqmFunction<?> sqmFunction) {
+		final Supplier<MappingModelExpressible<?>> oldFunctionImpliedResultTypeAccess = functionImpliedResultTypeAccess;
+		functionImpliedResultTypeAccess = inferrableTypeAccessStack.getCurrent();
 		inferrableTypeAccessStack.push( () -> null );
 		try {
 			return sqmFunction.convertToSqlAst( this );
 		}
 		finally {
 			inferrableTypeAccessStack.pop();
+			functionImpliedResultTypeAccess = oldFunctionImpliedResultTypeAccess;
 		}
 	}
 
@@ -5426,35 +5444,18 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 		}
 	}
 
-//	private <X> X visitWithLenientInferredType(SqmExpression<?> expression, SqmExpression<?> inferred) {
+	@Override
-//		inferrableTypeAccessStack.push(
+	public Object visitWithInferredType(
-//				() -> {
+			SqmVisitableNode node,
-//					MappingModelExpressible<?> definedType = creationContext
+			Supplier<MappingModelExpressible<?>> inferredTypeAccess) {
-//							.getDomainModel()
+		inferrableTypeAccessStack.push( inferredTypeAccess );
-//							.resolveMappingExpressible(
+		try {
-//									expression.getNodeType(),
+			return node.accept( this );
-//									getFromClauseIndex()::findTableGroup
+		}
-//							);
+		finally {
-//					if ( definedType != null ) {
+			inferrableTypeAccessStack.pop();
-//						return definedType;
+		}
-//					}
+	}
-//					definedType = creationContext
-//							.getDomainModel()
-//							.lenientlyResolveMappingExpressible(
-//									inferred.getNodeType(),
-//									getFromClauseIndex()::findTableGroup
-//							);
-//					return definedType;
-//				}
-//		);
-//
-//		try {
-//			return (X) expression.accept( this );
-//		}
-//		finally {
-//			inferrableTypeAccessStack.pop();
-//		}
-//	}
 
 	@Override
 	public Object visitAny(SqmAny<?> sqmAny) {

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/FakeSqmToSqlAstConverter.java

@@ -7,10 +7,14 @@
 package org.hibernate.query.sqm.sql;
 
 import java.util.List;
+import java.util.function.Supplier;
 
 import org.hibernate.LockMode;
 import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.metamodel.mapping.MappingModelExpressible;
 import org.hibernate.query.sqm.spi.BaseSemanticQueryWalker;
+import org.hibernate.query.sqm.tree.SqmVisitableNode;
+import org.hibernate.query.sqm.tree.expression.SqmExpression;
 import org.hibernate.query.sqm.tree.expression.SqmParameter;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.sql.ast.Clause;
@@ -80,6 +84,23 @@ public class FakeSqmToSqlAstConverter extends BaseSemanticQueryWalker implements
 	public void registerQueryTransformer(QueryTransformer transformer) {
 	}
 
+	@Override
+	public MappingModelExpressible<?> resolveFunctionImpliedReturnType() {
+		return null;
+	}
+
+	@Override
+	public MappingModelExpressible<?> determineValueMapping(SqmExpression<?> sqmExpression) {
+		return null;
+	}
+
+	@Override
+	public Object visitWithInferredType(
+			SqmVisitableNode node,
+			Supplier<MappingModelExpressible<?>> inferredTypeAccess) {
+		return node.accept( this );
+	}
+
 	@Override
 	public List<Expression> expandSelfRenderingFunctionMultiValueParameter(SqmParameter<?> sqmParameter) {
 		return null;

hibernate-core/src/main/java/org/hibernate/query/sqm/sql/SqmToSqlAstConverter.java

@@ -7,9 +7,13 @@
 package org.hibernate.query.sqm.sql;
 
 import java.util.List;
+import java.util.function.Supplier;
 
 import org.hibernate.internal.util.collections.Stack;
+import org.hibernate.metamodel.mapping.MappingModelExpressible;
 import org.hibernate.query.sqm.SemanticQueryWalker;
+import org.hibernate.query.sqm.tree.SqmVisitableNode;
+import org.hibernate.query.sqm.tree.expression.SqmExpression;
 import org.hibernate.query.sqm.tree.expression.SqmParameter;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.sql.ast.spi.SqlAstCreationState;
@@ -28,6 +32,19 @@ public interface SqmToSqlAstConverter extends SemanticQueryWalker<Object>, SqlAs
 
 	void registerQueryTransformer(QueryTransformer transformer);
 
+	/**
+	 * Returns the function return type implied from the context within which it is used.
+	 * If there is no current function being processed or no context implied type, the return is <code>null</code>.
+	 */
+	MappingModelExpressible<?> resolveFunctionImpliedReturnType();
+
+	MappingModelExpressible<?> determineValueMapping(SqmExpression<?> sqmExpression);
+
+	/**
+	 * Visits the given node with the given inferred type access.
+	 */
+	Object visitWithInferredType(SqmVisitableNode node, Supplier<MappingModelExpressible<?>> inferredTypeAccess);
+
 	List<Expression> expandSelfRenderingFunctionMultiValueParameter(SqmParameter<?> sqmParameter);
 
 	Predicate visitNestedTopLevelPredicate(SqmPredicate predicate);

hibernate-core/src/main/java/org/hibernate/sql/ast/Clause.java

@@ -52,6 +52,7 @@ public enum Clause {
 	FETCH,
 	FOR_UPDATE,
 	OVER,
+	WITHIN_GROUP,
 	PARTITION,
 	CALL,
 

hibernate-core/src/main/java/org/hibernate/sql/ast/SqlAstTranslator.java

@@ -8,6 +8,7 @@ package org.hibernate.sql.ast;
 
 import java.util.Set;
 
+import org.hibernate.internal.util.collections.Stack;
 import org.hibernate.query.spi.QueryOptions;
 import org.hibernate.sql.ast.tree.SqlAstNode;
 import org.hibernate.sql.ast.tree.select.QueryPart;
@@ -34,6 +35,8 @@ public interface SqlAstTranslator<T extends JdbcOperation> extends SqlAstWalker
 	 */
 	QueryPart getCurrentQueryPart();
 
+	Stack<Clause> getCurrentClauseStack();
+
 	/**
 	 * Not the best spot for this.  Its the table names collected while walking the SQL AST.
 	 * Its ok here because the translator is consider a one-time-use.  It just needs to be called

hibernate-core/src/main/java/org/hibernate/sql/ast/spi/AbstractSqlAstTranslator.java

@@ -587,10 +587,12 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 		return ( (ComparisonPredicate) predicate ).getLeftHandExpression();
 	}
 
-	protected boolean inOverClause() {
+	protected boolean inOverOrWithinGroupClause() {
 		return clauseStack.findCurrentFirst(
 				clause -> {
-					if ( clause == Clause.OVER ) {
+					switch ( clause ) {
+						case OVER:
+						case WITHIN_GROUP:
 							return true;
 					}
 					return null;
@@ -611,6 +613,11 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 		return queryPartStack.getCurrent();
 	}
 
+	@Override
+	public Stack<Clause> getCurrentClauseStack() {
+		return clauseStack;
+	}
+
 	@Override
 	public T translate(JdbcParameterBindings jdbcParameterBindings, QueryOptions queryOptions) {
 		try {
@@ -2208,7 +2215,7 @@ public abstract class AbstractSqlAstTranslator<T extends JdbcOperation> implemen
 			emulateSortSpecificationNullPrecedence( sortExpression, nullPrecedence );
 		}
 
-		if ( inOverClause() ) {
+		if ( inOverOrWithinGroupClause() ) {
 			resolveAliasedExpression( sortExpression ).accept( this );
 		}
 		else {

hibernate-core/src/test/java/org/hibernate/orm/test/hql/CoalesceTest.java

@@ -62,7 +62,6 @@ public class CoalesceTest extends BaseCoreFunctionalTestCase {
     }
 
     @Test
-    @SkipForDialect(jiraKey = "HHH-10463", value =  PostgreSQLDialect.class)
     public void HHH_10463_NullInCoalesce() {
         doInHibernate( this::sessionFactory, session -> {
             TypedQuery<Person> query = session.createQuery( "from Person p where p.name = coalesce(:name, p.name) ", Person.class );

hibernate-core/src/test/java/org/hibernate/orm/test/subquery/SubqueryTest.java

@@ -54,7 +54,7 @@ public class SubqueryTest extends BaseSessionFactoryFunctionalTest {
 				String name,
 				ArgumentsValidator argumentsValidator,
 				FunctionReturnTypeResolver returnTypeResolver) {
-			super( name, argumentsValidator, returnTypeResolver );
+			super( name, argumentsValidator, returnTypeResolver, null );
 		}
 
 		@Override

hibernate-envers/src/main/java/org/hibernate/envers/function/OrderByFragmentFunction.java

@@ -54,7 +54,8 @@ public class OrderByFragmentFunction extends AbstractSqmFunctionDescriptor {
 		super(
 				FUNCTION_NAME,
 				StandardArgumentsValidators.exactly( 2 ),
-				StandardFunctionReturnTypeResolvers.useArgType( 1 )
+				StandardFunctionReturnTypeResolvers.useArgType( 1 ),
+				null
 		);
 	}
 	@Override
@@ -174,9 +175,6 @@ public class OrderByFragmentFunction extends AbstractSqmFunctionDescriptor {
 
 		@Override
 		public Expression convertToSqlAst(SqmToSqlAstConverter walker) {
-			final ReturnableType<?> resultType = resolveResultType(
-					walker.getCreationContext().getMappingMetamodel().getTypeConfiguration()
-			);
 			final String sqmAlias = ( (SqmLiteral<String>) getArguments().get( 0 ) ).getLiteralValue();
 			final String attributeRole = ( (SqmLiteral<String>) getArguments().get( 1 ) ).getLiteralValue();
 			final TableGroup tableGroup = ( (FromClauseIndex) walker.getFromClauseAccess() ).findTableGroup(