Package com.apple.foundationdb.record.query.plan.temp.rules

Class ImplementDistinctUnionRule

java.lang.Object

com.apple.foundationdb.record.query.plan.temp.PlannerRule<LogicalDistinctExpression>

com.apple.foundationdb.record.query.plan.temp.rules.ImplementDistinctUnionRule

@API(EXPERIMENTAL)
public class ImplementDistinctUnionRule
extends PlannerRule<LogicalDistinctExpression>

A rule that implements a distinct union of its (already implemented) children. This will extract the RecordQueryPlan from each child of a LogicalUnorderedUnionExpression and create a RecordQueryUnionPlan with those plans as children.

Constructor Summary

Constructors

Constructor	Description
ImplementDistinctUnionRule()

Method Summary

Modifier and Type	Method	Description
void	onMatch(PlannerRuleCall call)

Methods inherited from class com.apple.foundationdb.record.query.plan.temp.PlannerRule

getMatcher, getRootOperator, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

ImplementDistinctUnionRule

public ImplementDistinctUnionRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<LogicalDistinctExpression>