Package it.unibz.inf.ontop.generation.normalization.impl

Class SubQueryFromComplexJoinExtraNormalizer

java.lang.Object

it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

it.unibz.inf.ontop.generation.normalization.impl.SubQueryFromComplexJoinExtraNormalizer

All Implemented Interfaces:

DialectExtraNormalizer, IQTreeTransformer, IQTreeVisitingTransformer

public class SubQueryFromComplexJoinExtraNormalizer
extends DefaultRecursiveIQTreeVisitingTransformer
implements DialectExtraNormalizer

When (left,inner) joins are having (left,inner) joins as children. Adds a ConstructionNode in those children to force the creation of a sub-query Useful for Dremio.

Field Summary

Fields inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

iqFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	SubQueryFromComplexJoinExtraNormalizer(CoreSingletons coreSingletons)

Method Summary

Modifier and Type	Method	Description
IQTree	transform(IQTree tree, VariableGenerator variableGenerator)
IQTree	transformInnerJoin(IQTree tree, InnerJoinNode rootNode, it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)
IQTree	transformLeftJoin(IQTree tree, LeftJoinNode rootNode, IQTree leftChild, IQTree rightChild)

Methods inherited from class it.unibz.inf.ontop.iq.transform.impl.DefaultRecursiveIQTreeVisitingTransformer

transformAggregation, transformBinaryNonCommutativeNode, transformConstruction, transformDistinct, transformEmpty, transformExtensionalData, transformFilter, transformIntensionalData, transformLeaf, transformNaryCommutativeNode, transformNonStandardBinaryNonCommutativeNode, transformNonStandardLeafNode, transformNonStandardNaryNode, transformNonStandardUnaryNode, transformOrderBy, transformSlice, transformTrue, transformUnaryNode, transformUnion, transformValues

Methods inherited from class java.lang.Object

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

Methods inherited from interface it.unibz.inf.ontop.iq.transform.IQTreeVisitingTransformer

transform

Constructor Detail

SubQueryFromComplexJoinExtraNormalizer

@Inject
protected SubQueryFromComplexJoinExtraNormalizer(CoreSingletons coreSingletons)

Method Detail

transform

public IQTree transform(IQTree tree,
                        VariableGenerator variableGenerator)

Specified by:

transform in interface DialectExtraNormalizer

transformLeftJoin

public IQTree transformLeftJoin(IQTree tree,
                                LeftJoinNode rootNode,
                                IQTree leftChild,
                                IQTree rightChild)

Specified by:

transformLeftJoin in interface IQTreeVisitingTransformer

Overrides:

transformLeftJoin in class DefaultRecursiveIQTreeVisitingTransformer

transformInnerJoin

public IQTree transformInnerJoin(IQTree tree,
                                 InnerJoinNode rootNode,
                                 it.unibz.inf.ontop.com.google.common.collect.ImmutableList<IQTree> children)

Specified by:

transformInnerJoin in interface IQTreeVisitingTransformer

Overrides:

transformInnerJoin in class DefaultRecursiveIQTreeVisitingTransformer