Package org.hibernate.dialect.function

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:

FunctionRenderingSupport, 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, SqlAstTranslator<?> walker)
void	render(SqlAppender sqlAppender, List<? extends SqlAstNode> sqlAstArguments, Predicate filter, SqlAstTranslator<?> translator)

Methods inherited from class org.hibernate.query.sqm.function.AbstractSqmSelfRenderingFunctionDescriptor

generateSqmAggregateFunctionExpression, generateSqmFunctionExpression, generateSqmOrderedSetAggregateFunctionExpression, generateSqmWindowFunctionExpression, getFunctionKind

Methods inherited from class org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.hibernate.query.sqm.function.FunctionRenderingSupport

render, render

Methods inherited from interface org.hibernate.query.sqm.function.SqmFunctionDescriptor

alwaysIncludesParentheses, generateSqmExpression, generateSqmExpression

Constructor Detail

PostgreSQLMinMaxFunction

public PostgreSQLMinMaxFunction(String name)

Method Detail

render

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

render

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

getArgumentListSignature

public String getArgumentListSignature()

Overrides:

getArgumentListSignature in class AbstractSqmFunctionDescriptor