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

Class PushTypeFilterBelowFilterRule

java.lang.Object

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

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

@API(EXPERIMENTAL)
public class PushTypeFilterBelowFilterRule
extends PlannerRule<RecordQueryTypeFilterPlan>

A rule that moves a RecordQueryTypeFilterPlan below a RecordQueryFilterPlan. While this doesn't make a difference in terms of plan semantics it ensures that the generated plans have the same form as those produced by the RecordQueryPlanner.

 
             +-----------------------------+                +----------------------------------+
             |                             |                |                                  |
             |  RecordQueryTypeFilterPlan  |                |  RecordQueryPredicateFilterPlan  |
             |                             |                |                           pred'  |
             +-------------+---------------+                |                                  |
                           |                                +-----------------+----------------+
                           |                      +----->                     |
                           |                                                  | newQun
           +---------------+------------------+                               |
           |                                  |             +-----------------+---------------+
           |  RecordQueryPredicateFilterPlan  |             |                                 |
           |                            pred  |             |  RecordQueryTypeFilterPlanPlan  |
           |                                  |             |                                 |
           +---------------+------------------+             +-----------------+---------------+
                           |                                                  /
                           | qun                                             /
                           |                                                /
                    +------+------+                                        /
                    |             |                                       /
                    |   any ref   | -------------------------------------+
                    |             |
                    +-------------+
 
 

where pred' is rebased along the translation from qun to newQun.

Constructor Summary

Constructors

Constructor	Description
PushTypeFilterBelowFilterRule()

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

PushTypeFilterBelowFilterRule

public PushTypeFilterBelowFilterRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<RecordQueryTypeFilterPlan>