Package 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 Object
implements OptimizerRule

Marks join as a candidate merge join if conditions are met

Constructor Summary

Constructors

Constructor	Description
RuleChooseJoinStrategy()

Method Summary

Modifier and Type	Method	Description
static List<Expression>	createExpressionSymbols(List<? extends Expression> expressions)
PlanNode	execute(PlanNode plan, QueryMetadataInterface metadata, CapabilitiesFinder capFinder, RuleStack rules, AnalysisRecord analysisRecord, CommandContext context)
static void	separateCriteria(Collection<GroupSymbol> leftGroups, Collection<GroupSymbol> rightGroups, List<Expression> leftExpressions, List<Expression> rightExpressions, List<Criteria> crits, Collection<Criteria> nonEquiJoinCriteria)
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(Collection<GroupSymbol> leftGroups,
                                    Collection<GroupSymbol> rightGroups,
                                    List<Expression> leftExpressions,
                                    List<Expression> rightExpressions,
                                    List<Criteria> crits,
                                    Collection<Criteria> nonEquiJoinCriteria)

createExpressionSymbols

public static List<Expression> createExpressionSymbols(List<? extends Expression> expressions)

toString

public String toString()

Overrides:

toString in class Object