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

Class FlattenNestedAndPredicateRule

java.lang.Object

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

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

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

A simple rule that performs some basic Boolean normalization by flattening a nested AndPredicate into a single, wider AND. This rule only attempts to remove a single AndComponent; it may be repeated if necessary. For example, it would transform: Query.and( Query.and(Query.field("a").equals("foo"), Query.field("b").equals("bar")), Query.field(c").equals("baz"), Query.and(Query.field("d").equals("food"), Query.field("e").equals("bare")) to Query.and( Query.field("a").equals("foo"), Query.field("b").equals("bar"), Query.field("c").equals("baz")), Query.and(Query.field("d").equals("food"), Query.field("e").equals("bare"))

Constructor Summary

Constructors

Constructor	Description
FlattenNestedAndPredicateRule()

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

FlattenNestedAndPredicateRule

public FlattenNestedAndPredicateRule()

Method Detail

onMatch

public void onMatch(@Nonnull
                    PlannerRuleCall call)

Specified by:

onMatch in class PlannerRule<LogicalFilterExpression>