Package org.hibernate.dialect.function.json

Class H2JsonTableFunction

java.lang.Object

org.hibernate.query.sqm.function.AbstractSqmSetReturningFunctionDescriptor

org.hibernate.query.sqm.function.AbstractSqmSelfRenderingSetReturningFunctionDescriptor

org.hibernate.dialect.function.json.JsonTableFunction

org.hibernate.dialect.function.json.H2JsonTableFunction

All Implemented Interfaces:

SetReturningFunctionRenderer, SqmSetReturningFunctionDescriptor

public class H2JsonTableFunction
extends JsonTableFunction

H2 json_table function.

H2 does not support "lateral" i.e. the use of a from node within another, but we can apply the same trick that we already applied everywhere else for H2, which is to join a sequence table to emulate array element rows and eliminate non-existing array elements by checking the index against array length. Finally, we rewrite the selection expressions to access the array by joined sequence index.

Nested Class Summary

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

JsonTableFunction.JsonTableArguments

Constructor Summary

Constructors

Constructor	Description
H2JsonTableFunction(int maximumArraySize, TypeConfiguration typeConfiguration)

Method Summary

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

Methods inherited from class org.hibernate.dialect.function.json.JsonTableFunction

countNestedColumnDefinitions, determineColumnType, determineColumnType, render, renderColumnDefinitions, renderColumnPath, renderColumns, renderJsonExistsColumnDefinition, renderJsonNestedColumnDefinition, renderJsonOrdinalityColumnDefinition, renderJsonQueryColumnDefinition, renderJsonValueColumnDefinition

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

H2JsonTableFunction

public H2JsonTableFunction(int maximumArraySize,
 TypeConfiguration typeConfiguration)

Method Details

generateSqmSetReturningFunctionExpression

protected <T>
SelfRenderingSqmSetReturningFunction<T> generateSqmSetReturningFunctionExpression(List<? extends SqmTypedNode<?>> sqmArguments,
 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 JsonTableFunction

Parameters:

sqmArguments - the arguments of the function invocation

rendersIdentifierVariable

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

renderJsonTable

protected void renderJsonTable(SqlAppender sqlAppender,
 JsonTableFunction.JsonTableArguments arguments,
 AnonymousTupleTableGroupProducer tupleType,
 String tableIdentifierVariable,
 SqlAstTranslator<?> walker)

Overrides:

renderJsonTable in class JsonTableFunction