Package org.hibernate.dialect.function

Class DateTruncEmulation

java.lang.Object

org.hibernate.query.sqm.function.AbstractSqmFunctionDescriptor

org.hibernate.dialect.function.DateTruncEmulation

All Implemented Interfaces:

FunctionRenderer, SqmFunctionDescriptor

public class DateTruncEmulation
extends AbstractSqmFunctionDescriptor
implements FunctionRenderer

Emulation of trunc(datetime, temporal_unit) function that leverages formatting the datetime to string and back to truncate it

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	toDateFunction

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DateTruncEmulation(String toDateFunction, TypeConfiguration typeConfiguration)

Method Summary

Modifier and Type	Method	Description
protected <T> SelfRenderingSqmFunction<T>	generateSqmFunctionExpression(List<? extends SqmTypedNode<?>> arguments, ReturnableType<T> impliedResultType, QueryEngine queryEngine)	Return an SQM node or subtree representing an invocation of this function with the given arguments.
void	render(SqlAppender sqlAppender, List<? extends SqlAstNode> sqlAstArguments, ReturnableType<?> returnType, SqlAstTranslator<?> walker)

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

generateAggregateSqmExpression, generateOrderedSetAggregateSqmExpression, generateSqmAggregateFunctionExpression, generateSqmExpression, generateSqmOrderedSetAggregateFunctionExpression, generateSqmWindowFunctionExpression, generateWindowSqmExpression, getArgumentListSignature, 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.FunctionRenderer

render, render, render, render

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

alwaysIncludesParentheses, generateSqmExpression, generateSqmExpression, getFunctionKind, isPredicate

Field Details

toDateFunction

protected final String toDateFunction

Constructor Details

DateTruncEmulation

protected DateTruncEmulation(String toDateFunction,
 TypeConfiguration typeConfiguration)

Method Details

render

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

Specified by:

render in interface FunctionRenderer

generateSqmFunctionExpression

protected <T> SelfRenderingSqmFunction<T> generateSqmFunctionExpression(List<? extends SqmTypedNode<?>> arguments,
 ReturnableType<T> impliedResultType,
 QueryEngine queryEngine)

Description copied from class: AbstractSqmFunctionDescriptor

Return an SQM node or subtree representing an invocation of this function with the given arguments. This method may be overridden in the case of function descriptors that wish to customize creation of the node.

Specified by:

generateSqmFunctionExpression in class AbstractSqmFunctionDescriptor

Parameters:

arguments - the arguments of the function invocation

impliedResultType - the function return type as inferred from its usage