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

Class HeuristicsBasedLogicalOptimizerImpl

java.lang.Object

se.liu.ida.hefquin.engine.queryproc.impl.loptimizer.HeuristicsBasedLogicalOptimizerImpl

All Implemented Interfaces:

LogicalOptimizer

public class HeuristicsBasedLogicalOptimizerImpl
extends Object
implements LogicalOptimizer

Field Summary

Fields

Modifier and Type	Field	Description
protected final QueryProcContext	ctxt
protected final List<HeuristicForLogicalOptimization>	heuristics

Constructor Summary

Constructors

Constructor	Description
HeuristicsBasedLogicalOptimizerImpl(QueryProcContext ctxt, List<HeuristicForLogicalOptimization> heuristics)

Method Summary

Modifier and Type	Method	Description
static List<HeuristicForLogicalOptimization>	getDefaultHeuristics(QueryProcContext ctxt)
LogicalPlan	optimize(LogicalPlan inputPlan, boolean keepNaryOperators)

Methods inherited from class java.lang.Object

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

Field Details

heuristics

protected final List<HeuristicForLogicalOptimization> heuristics

ctxt

protected final QueryProcContext ctxt

Constructor Details

HeuristicsBasedLogicalOptimizerImpl

public HeuristicsBasedLogicalOptimizerImpl(QueryProcContext ctxt,
 List<HeuristicForLogicalOptimization> heuristics)

Method Details

getDefaultHeuristics

public static List<HeuristicForLogicalOptimization> getDefaultHeuristics(QueryProcContext ctxt)

optimize

public LogicalPlan optimize(LogicalPlan inputPlan,
 boolean keepNaryOperators)
                     throws LogicalOptimizationException

Specified by:

optimize in interface LogicalOptimizer

Throws:

LogicalOptimizationException