it.unibz.inf.ontop.iq.node

Interface AggregationNode

All Superinterfaces:

Cloneable, ExplicitVariableProjectionNode, ExtendedProjectionNode, QueryNode, UnaryOperatorNode

All Known Implementing Classes:

AggregationNodeImpl

public interface AggregationNode
extends ExtendedProjectionNode

Combines GROUP BY and a projection See IntermediateQueryFactory for creating a new instance.

Method Summary

Modifier and Type	Method and Description
AggregationNode	acceptNodeTransformer(HomogeneousQueryNodeTransformer transformer) "Accept" method for the "Visitor" pattern.
AggregationNode	clone() Cloning is needed for having multiple copies in the same intermediate query tree.
com.google.common.collect.ImmutableSet<Variable>	getGroupingVariables()
ImmutableSubstitution<ImmutableFunctionalTerm>	getSubstitution() (Some) projected variable --> transformed variable

Methods inherited from interface it.unibz.inf.ontop.iq.node.ExtendedProjectionNode

getChildVariables

Methods inherited from interface it.unibz.inf.ontop.iq.node.ExplicitVariableProjectionNode

getVariables

Methods inherited from interface it.unibz.inf.ontop.iq.node.UnaryOperatorNode

acceptTransformer, acceptVisitor, applyDescendingSubstitution, applyDescendingSubstitutionWithoutOptimizing, applyFreshRenaming, computeNotInternallyRequiredVariables, getPossibleVariableDefinitions, getVariableNullability, inferUniqueConstraints, isConstructed, isDistinct, liftIncompatibleDefinitions, normalizeForOptimization, propagateDownConstraint, removeDistincts, validateNode

Methods inherited from interface it.unibz.inf.ontop.iq.node.QueryNode

acceptVisitor, getLocallyDefinedVariables, getLocallyRequiredVariables, getLocalVariables, getRequiredVariables, isEquivalentTo, isSyntacticallyEquivalentTo, isVariableNullable

Method Detail

getSubstitution

ImmutableSubstitution<ImmutableFunctionalTerm> getSubstitution()

Description copied from interface: ExtendedProjectionNode

(Some) projected variable --> transformed variable

Specified by:

getSubstitution in interface ExtendedProjectionNode

getGroupingVariables

com.google.common.collect.ImmutableSet<Variable> getGroupingVariables()

clone

AggregationNode clone()

Description copied from interface: QueryNode

Cloning is needed for having multiple copies in the same intermediate query tree.

Specified by:

clone in interface QueryNode

acceptNodeTransformer

AggregationNode acceptNodeTransformer(HomogeneousQueryNodeTransformer transformer)
                               throws QueryNodeTransformationException

Description copied from interface: QueryNode

"Accept" method for the "Visitor" pattern. To be implemented by leaf classes. If the transformation cannot be done, throw a QueryNodeTransformationException

Specified by:

acceptNodeTransformer in interface QueryNode

Specified by:

acceptNodeTransformer in interface UnaryOperatorNode

Throws:

QueryNodeTransformationException