Package se.liu.ida.hefquin.engine.queryproc.impl.loptimizer.heuristics

Class RemovePairsOfG2lAndL2g

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.loptimizer.heuristics.RemovePairsOfG2lAndL2g

All Implemented Interfaces:

HeuristicForLogicalOptimization

public class RemovePairsOfG2lAndL2g
extends Object
implements HeuristicForLogicalOptimization

Constructor Summary

Constructors

Constructor	Description
RemovePairsOfG2lAndL2g()

Method Summary

Modifier and Type	Method	Description
LogicalPlan	apply(LogicalPlan inputPlan)	Applies this heuristics to the given plan and returns the resulting, potentially rewritten plan.
static boolean	checkIfG2lAndL2gPairsRemovable(LogicalPlan plan)	If a pair of g2l and l2g operators use the same vocabulary mapping, these two operators can be omitted

Methods inherited from class java.lang.Object

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

Constructor Details

RemovePairsOfG2lAndL2g

public RemovePairsOfG2lAndL2g()

Method Details

apply

public LogicalPlan apply(LogicalPlan inputPlan)

Description copied from interface: HeuristicForLogicalOptimization

Applies this heuristics to the given plan and returns the resulting, potentially rewritten plan.

Specified by:

apply in interface HeuristicForLogicalOptimization

checkIfG2lAndL2gPairsRemovable

public static boolean checkIfG2lAndL2gPairsRemovable(LogicalPlan plan)

If a pair of g2l and l2g operators use the same vocabulary mapping, these two operators can be omitted