Class PostgreSQLMinMaxFunction

java.lang.Object

org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor

org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor

org.hibernate.dialect.function.PostgreSQLMinMaxFunction

All Implemented Interfaces:

FunctionRenderer, SqmFunctionDescriptor

public class PostgreSQLMinMaxFunction
extends AbstractSqmSelfRenderingFunctionDescriptor

PostgreSQL doesn't support min/max for uuid yet, but since that type is comparable we want to support this operation. The workaround is to cast uuid to text and aggregate that, which preserves the ordering, and finally cast the result back to uuid.

Constructor Summary

Constructors

Constructor	Description
PostgreSQLMinMaxFunction(String name)

Method Summary

Modifier and Type	Method	Description
String	getArgumentListSignature()
void	render(SqlAppender sqlAppender, List<? extends SqlAstNode> sqlAstArguments, ReturnableType<?> returnType, SqlAstTranslator<?> walker)
void	render(SqlAppender sqlAppender, List<? extends SqlAstNode> sqlAstArguments, Predicate filter, ReturnableType<?> returnType, SqlAstTranslator<?> translator)

Methods inherited from class AbstractSqmSelfRenderingFunctionDescriptor

filterClauseSupported, generateSqmAggregateFunctionExpression, generateSqmFunctionExpression, generateSqmOrderedSetAggregateFunctionExpression, generateSqmWindowFunctionExpression, getFunctionKind

Methods inherited from class AbstractSqmFunctionDescriptor

generateAggregateSqmExpression, generateOrderedSetAggregateSqmExpression, generateSqmExpression, generateWindowSqmExpression, getArgumentsValidator, getArgumentTypeResolver, getName, getReturnSignature, getReturnTypeResolver, getSignature

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface FunctionRenderer

render, render, render

Methods inherited from interface SqmFunctionDescriptor

alwaysIncludesParentheses, generateSqmExpression, generateSqmExpression, isPredicate

Constructor Details

PostgreSQLMinMaxFunction

public PostgreSQLMinMaxFunction(String name)

Method Details

render

public void render(SqlAppender sqlAppender,
 List<? extends SqlAstNode> sqlAstArguments,
 ReturnableType<?> returnType,
 SqlAstTranslator<?> walker)

Specified by:

render in interface FunctionRenderer

Overrides:

render in class AbstractSqmSelfRenderingFunctionDescriptor

render

public void render(SqlAppender sqlAppender,
 List<? extends SqlAstNode> sqlAstArguments,
 Predicate filter,
 ReturnableType<?> returnType,
 SqlAstTranslator<?> translator)

getArgumentListSignature

public String getArgumentListSignature()

Overrides:

getArgumentListSignature in class AbstractSqmFunctionDescriptor