Package se.liu.ida.hefquin.engine.queryplan.logical
package se.liu.ida.hefquin.engine.queryplan.logical
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ClassDescriptionAn interface for any type of
LogicalOperatorthat has an arity of two; i.e., it is defined of as a function over two multisets of solution mappings.The top-level interface for all types of logical operators of HeFQUIN.Applies aLogicalPlanVisitorto a givenLogicalPlanrecursively in a depth-first order.An interface for any type ofLogicalOperatorthat has an arbitrary arity ; i.e., it is defined of as a function over an arbitrary number of multisets of solution mappings.An interface for any type ofLogicalOperatorthat has an arity of zero.An interface for any type ofLogicalOperatorthat has an arity of one; i.e., it is defined of as a function over one multiset of solution mappings.