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

Class PushElementWithComparisonIntoExistingScanRule

java.lang.Object

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

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

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

A simple rule that looks for a ComponentWithComparison predicate and a compatibly ordered index scan comparison down to the index scan.

 
       +-----------------------------+               +----------------------------------+
       |                             |               |                                  |
       |  LogicalFilterExpression    |     +------>  |  IndexEntrySourceScanExpression  |
       |                elementPred  |               |  elementComparison ∪ comparisons |
       |                             |               |                                  |
       +-------------+---------------+               +----------------------------------+
                     |
                     |
                     |
     +---------------+------------------+
     |                                  |
     |  IndexEntrySourceScanExpression  |
     |                     comparisons  |
     |                                  |
     +----------------------------------+
 
 

Constructor Summary

Constructors

Constructor	Description
PushElementWithComparisonIntoExistingScanRule()

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

PushElementWithComparisonIntoExistingScanRule

public PushElementWithComparisonIntoExistingScanRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<LogicalFilterExpression>