it.unibz.inf.ontop.iq.node.normalization.impl

Class AggregationNormalizerImpl

java.lang.Object

it.unibz.inf.ontop.iq.node.normalization.impl.AggregationNormalizerImpl

All Implemented Interfaces:

AggregationNormalizer

public class AggregationNormalizerImpl
extends Object
implements AggregationNormalizer

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	AggregationNormalizerImpl.AggregationNormalizationState

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AggregationNormalizerImpl(CoreSingletons coreSingletons)

Method Summary

Modifier and Type	Method and Description
IQTree	normalizeForOptimization(AggregationNode aggregationNode, IQTree child, VariableGenerator variableGenerator, IQProperties currentIQProperties) Blocks distinct.

Methods inherited from class java.lang.Object

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

Constructor Detail

AggregationNormalizerImpl

@Inject
protected AggregationNormalizerImpl(CoreSingletons coreSingletons)

Method Detail

normalizeForOptimization

public IQTree normalizeForOptimization(AggregationNode aggregationNode,
                                       IQTree child,
                                       VariableGenerator variableGenerator,
                                       IQProperties currentIQProperties)

Blocks distinct. May block some bindings and some filter conditions. TODO: enable lifting some filter conditions TODO: we may consider remove distincts in the sub-tree when cardinality does not affect the substitution definitions

Specified by:

normalizeForOptimization in interface AggregationNormalizer