Package com.apple.foundationdb.record.query.plan.visitor

Class UnionVisitor

java.lang.Object

com.apple.foundationdb.record.query.plan.visitor.RecordQueryPlannerSubstitutionVisitor

com.apple.foundationdb.record.query.plan.visitor.UnionVisitor

public class UnionVisitor
extends RecordQueryPlannerSubstitutionVisitor

This visitor pulls index fetches after the intersection if possible. Starting Plan UnionPlan / \ / \ RecordQueryPlan (IndexFetch) RecordQueryPlan (IndexFetch) | | V Transformed Plan UnionPlan (IndexFetch) / \ / \ RecordQueryPlan RecordQueryPlan

Field Summary

Fields inherited from class com.apple.foundationdb.record.query.plan.visitor.RecordQueryPlannerSubstitutionVisitor

recordMetadata

Constructor Summary

Constructors

Constructor	Description
UnionVisitor(RecordMetaData recordMetadata, PlannableIndexTypes indexTypes, KeyExpression commonPrimaryKey)

Method Summary

Modifier and Type	Method	Description
RecordQueryPlan	postVisit(RecordQueryPlan recordQueryPlan)

Methods inherited from class com.apple.foundationdb.record.query.plan.visitor.RecordQueryPlannerSubstitutionVisitor

applyVisitors, availableFields, availableFields, removeIndexFetch, removeIndexFetch

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionVisitor

public UnionVisitor(@Nonnull
                    RecordMetaData recordMetadata,
                    @Nonnull
                    PlannableIndexTypes indexTypes,
                    @Nullable
                    KeyExpression commonPrimaryKey)

Method Detail

postVisit

@Nonnull
public RecordQueryPlan postVisit(@Nonnull
                                 RecordQueryPlan recordQueryPlan)

Specified by:

postVisit in class RecordQueryPlannerSubstitutionVisitor