org.teiid.query.optimizer.relational.rules
Class RuleChooseJoinStrategy

java.lang.Object
  org.teiid.query.optimizer.relational.rules.RuleChooseJoinStrategy

All Implemented Interfaces:

OptimizerRule

public class RuleChooseJoinStrategy
extends java.lang.Object
implements OptimizerRule

Marks join as a candidate merge join if conditions are met

Constructor Summary

RuleChooseJoinStrategy()

Method Summary

static java.util.List<SingleElementSymbol>	createExpressionSymbols(java.util.List<? extends Expression> expressions)
PlanNode	execute(PlanNode plan, QueryMetadataInterface metadata, CapabilitiesFinder capFinder, RuleStack rules, AnalysisRecord analysisRecord, CommandContext context)
static void	separateCriteria(java.util.Collection<GroupSymbol> leftGroups, java.util.Collection<GroupSymbol> rightGroups, java.util.List<Expression> leftExpressions, java.util.List<Expression> rightExpressions, java.util.List<Criteria> crits, java.util.List<Criteria> nonEquiJoinCriteria)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RuleChooseJoinStrategy

public RuleChooseJoinStrategy()

Method Detail

execute

public PlanNode execute(PlanNode plan,
                        QueryMetadataInterface metadata,
                        CapabilitiesFinder capFinder,
                        RuleStack rules,
                        AnalysisRecord analysisRecord,
                        CommandContext context)
                 throws QueryMetadataException,
                        TeiidComponentException

Specified by:

execute in interface OptimizerRule

Throws:

QueryMetadataException

TeiidComponentException

separateCriteria

public static void separateCriteria(java.util.Collection<GroupSymbol> leftGroups,
                                    java.util.Collection<GroupSymbol> rightGroups,
                                    java.util.List<Expression> leftExpressions,
                                    java.util.List<Expression> rightExpressions,
                                    java.util.List<Criteria> crits,
                                    java.util.List<Criteria> nonEquiJoinCriteria)

createExpressionSymbols

public static java.util.List<SingleElementSymbol> createExpressionSymbols(java.util.List<? extends Expression> expressions)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object