it.unibz.inf.ontop.iq.visitor

Interface RequiredDataAtomExtractor

All Superinterfaces:

IQVisitor<Stream<DataAtom<RelationPredicate>>>

All Known Implementing Classes:

RequiredDataAtomExtractorImpl

public interface RequiredDataAtomExtractor
extends IQVisitor<Stream<DataAtom<RelationPredicate>>>

Looks for data atoms that are required to provide tuples. For instance, excludes data atoms only appearing on the right of a LJ. MAY BE INCOMPLETE

Method Summary

Methods inherited from interface it.unibz.inf.ontop.iq.visit.IQVisitor

visitAggregation, visitConstruction, visitDistinct, visitEmpty, visitExtensionalData, visitFilter, visitInnerJoin, visitIntensionalData, visitLeftJoin, visitNative, visitNonStandardBinaryNonCommutativeNode, visitNonStandardLeafNode, visitNonStandardNaryNode, visitNonStandardUnaryNode, visitOrderBy, visitSlice, visitTrue, visitUnion