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

Class CombineFilterRule

java.lang.Object

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

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

@API(EXPERIMENTAL)
public class CombineFilterRule
extends PlannerRule<LogicalFilterExpression>

A simple rule that combines two nested filter plans and combines them into a single filter plan with a conjunction of the two filters.

 
     +----------------------------+                               +-------------------------------------+
     |                            |                               |                                     |
     |  LogicalFilterExpression   |                               |  LogicalFilterExpression            |
     |                 upperPred  |                               |             lowerPred' ^ upperPred  |
     |                            |                               |                                     |
     +-------------+--------------+                               +------------------+------------------+
                   |                                                                 |
                   |  upperQun                                                       |
                   |                    +------------------->                        |
     +-------------+--------------+                                                  |
     |                            |                                                  |
     |  LogicalFilterExpression   |                                                  |
     |                 lowerPred  |                                                  |
     |                            |                                                  |
     +-------------+--------------+                                                  |
                   |                                                                 | upperQun'
                   |  lowerQun                                                       |
                   |                                                                 |
             +-----+-----+                                                           |
             |           |                                                           |
             |  anyRef   |   +-------------------------------------------------------+
             |           |
             +-----------+
 
 

where lowerPred has been rebased (pulled up through upperQun). upperQun' on the right side is still a duplicated quantifier but it shares the same name.

Constructor Summary

Constructors

Constructor	Description
CombineFilterRule()

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

CombineFilterRule

public CombineFilterRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<LogicalFilterExpression>