org.teiid.query.optimizer.relational.rules

Class RulePlanSubqueries

java.lang.Object

org.teiid.query.optimizer.relational.rules.RulePlanSubqueries

All Implemented Interfaces:

OptimizerRule

public final class RulePlanSubqueries
extends Object
implements OptimizerRule

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	RulePlanSubqueries.PlannedResult
static class	RulePlanSubqueries.ReferenceReplacementVisitor Used to replace correlated references

Constructor Summary

Constructors

Constructor and Description
RulePlanSubqueries(IDGenerator idGenerator, CapabilitiesFinder capFinder, AnalysisRecord analysisRecord, CommandContext context, QueryMetadataInterface metadata)

Method Summary

Modifier and Type	Method and Description
PlanNode	execute(PlanNode plan, QueryMetadataInterface metadata, CapabilitiesFinder capFinder, RuleStack rules, AnalysisRecord analysisRecord, CommandContext context)
RulePlanSubqueries.PlannedResult	findSubquery(Criteria crit, boolean unnest)
RulePlanSubqueries.PlannedResult	findSubquery(Expression expr, boolean unnest, RulePlanSubqueries.PlannedResult result, boolean requireSingleRow)
static boolean	isDistinct(Query query, List<Expression> expressions, QueryMetadataInterface metadata)
boolean	planQuery(Collection<GroupSymbol> leftGroups, boolean requireDistinct, RulePlanSubqueries.PlannedResult plannedResult)
static boolean	requiresDistinctRows(Query query) Return true if the result from the subquery may be different if non-distinct rows are used as input
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

RulePlanSubqueries

public RulePlanSubqueries(IDGenerator idGenerator,
                          CapabilitiesFinder capFinder,
                          AnalysisRecord analysisRecord,
                          CommandContext context,
                          QueryMetadataInterface metadata)

Method Detail

requiresDistinctRows

public static boolean requiresDistinctRows(Query query)

Return true if the result from the subquery may be different if non-distinct rows are used as input

Parameters:

query -

Returns:

execute

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

Specified by:

execute in interface OptimizerRule

Throws:

QueryPlannerException

TeiidComponentException

findSubquery

public RulePlanSubqueries.PlannedResult findSubquery(Expression expr,
                                                     boolean unnest,
                                                     RulePlanSubqueries.PlannedResult result,
                                                     boolean requireSingleRow)
                                              throws QueryMetadataException,
                                                     TeiidComponentException

Throws:

QueryMetadataException

TeiidComponentException

findSubquery

public RulePlanSubqueries.PlannedResult findSubquery(Criteria crit,
                                                     boolean unnest)
                                              throws TeiidComponentException,
                                                     QueryMetadataException

Throws:

TeiidComponentException

QueryMetadataException

planQuery

public boolean planQuery(Collection<GroupSymbol> leftGroups,
                         boolean requireDistinct,
                         RulePlanSubqueries.PlannedResult plannedResult)
                  throws QueryMetadataException,
                         TeiidComponentException

Throws:

QueryMetadataException

TeiidComponentException

isDistinct

public static boolean isDistinct(Query query,
                                 List<Expression> expressions,
                                 QueryMetadataInterface metadata)
                          throws QueryMetadataException,
                                 TeiidComponentException

Throws:

QueryMetadataException

TeiidComponentException

toString

public String toString()

Overrides:

toString in class Object