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

Class FindPossibleIndexForAndPredicateRule

java.lang.Object

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

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

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

A rule that finds all indexes that could implement one of the ComponentWithComparison conjuncts of an AND filter, leaving all the other filters (of any type, including other fields) as a residual filter.

 
                                                     index 1:                                        index n:
      +----------------------------+                     +------------------------------+               +------------------------------+
      |                            |                     |                              |               |                              |
      |  LogicalFilterExpression   |                     |  LogicalFilterExpression     |               |  LogicalFilterExpression     |
      |          element <>= val   |                     |              residual preds  |               |              residual preds  |
      |                            |                     |                              |               |                              |
      +-------------+--------------+                     +---------------+--------------+               +---------------+--------------+
                    |                    +-------->                      |                    ...                       |
                    |  qun                                               |                                              |
                    |                                                    |                                              |
     +--------------+----------------+               +-------------------+-----------------+        +-------------------+-----------------+
     |                               |               |                                     |        |                                     |
     |  FullUnorderedScanExpression  |               |  IndexEntrySourceScanExpression     |        |  IndexEntrySourceScanExpression     |
     |                               |               |                        scan ranges  |        |                        scan ranges  |
     +-------------------------------+               |                                     |        |                                     |
                                                    +-------------------------------------+        +-------------------------------------+
 

Constructor Summary

Constructors

Constructor	Description
FindPossibleIndexForAndPredicateRule()

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

FindPossibleIndexForAndPredicateRule

public FindPossibleIndexForAndPredicateRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<LogicalFilterExpression>