Package org.hibernate.dialect.function

Class H2GenerateSeriesFunction

java.lang.Object

org.hibernate.query.sqm.function.AbstractSqmSetReturningFunctionDescriptor

org.hibernate.query.sqm.function.AbstractSqmSelfRenderingSetReturningFunctionDescriptor

org.hibernate.dialect.function.GenerateSeriesFunction

org.hibernate.dialect.function.NumberSeriesGenerateSeriesFunction

org.hibernate.dialect.function.H2GenerateSeriesFunction

All Implemented Interfaces:

SetReturningFunctionRenderer, SqmSetReturningFunctionDescriptor

public class H2GenerateSeriesFunction
extends NumberSeriesGenerateSeriesFunction

H2 generate_series function. When possible, the system_range function is used directly. If ordinality is requested, the arguments are temporals or anything other than literals, this emulation comes into play. It essentially renders a system_range with a specified maximum size that serves as "iteration variable". References to the value are replaced with expressions of the form start + step * iterationVariable and a condition is added either to the query or join where the function is used to ensure that the value is less than or equal to the stop value.

Nested Class Summary

Nested classes/interfaces inherited from class org.hibernate.dialect.function.NumberSeriesGenerateSeriesFunction

NumberSeriesGenerateSeriesFunction.NumberSeriesGenerateSeriesSetReturningFunctionTypeResolver, NumberSeriesGenerateSeriesFunction.NumberSeriesQueryTransformer

Field Summary

Fields inherited from class org.hibernate.dialect.function.NumberSeriesGenerateSeriesFunction

maxSeriesSize

Fields inherited from class org.hibernate.dialect.function.GenerateSeriesFunction

coerceToTimestamp

Constructor Summary

Constructors

Constructor	Description
H2GenerateSeriesFunction(int maxSeriesSize, TypeConfiguration typeConfiguration)

Method Summary

Modifier and Type	Method	Description
protected <T> SelfRenderingSqmSetReturningFunction<T>	generateSqmSetReturningFunctionExpression(List<? extends SqmTypedNode<?>> arguments, QueryEngine queryEngine)	Return an SQM node or subtree representing an invocation of this function with the given arguments.
protected void	renderGenerateSeries(SqlAppender sqlAppender, Expression start, Expression stop, @Nullable Expression step, AnonymousTupleTableGroupProducer tupleType, String tableIdentifierVariable, SqlAstTranslator<?> walker)
boolean	rendersIdentifierVariable(List<SqlAstNode> arguments, SessionFactoryImplementor sessionFactory)

Methods inherited from class org.hibernate.dialect.function.NumberSeriesGenerateSeriesFunction

add, multiply, multiply, needsVariable

Methods inherited from class org.hibernate.dialect.function.GenerateSeriesFunction

render

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

generateSqmExpression, getArgumentListSignature, getArgumentsValidator, getArgumentTypeResolver, getName, getSetReturningTypeResolver, getSignature

Methods inherited from class java.lang.Object

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

Constructor Details

H2GenerateSeriesFunction

public H2GenerateSeriesFunction(int maxSeriesSize,
 TypeConfiguration typeConfiguration)

Method Details

rendersIdentifierVariable

public boolean rendersIdentifierVariable(List<SqlAstNode> arguments,
 SessionFactoryImplementor sessionFactory)

generateSqmSetReturningFunctionExpression

protected <T>
SelfRenderingSqmSetReturningFunction<T> generateSqmSetReturningFunctionExpression(List<? extends SqmTypedNode<?>> arguments,
 QueryEngine queryEngine)

Description copied from class: AbstractSqmSetReturningFunctionDescriptor

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.

Overrides:

generateSqmSetReturningFunctionExpression in class AbstractSqmSelfRenderingSetReturningFunctionDescriptor

Parameters:

arguments - the arguments of the function invocation

renderGenerateSeries

protected void renderGenerateSeries(SqlAppender sqlAppender,
 Expression start,
 Expression stop,
 @Nullable Expression step,
 AnonymousTupleTableGroupProducer tupleType,
 String tableIdentifierVariable,
 SqlAstTranslator<?> walker)

Specified by:

renderGenerateSeries in class NumberSeriesGenerateSeriesFunction