Package org.apache.calcite.rel.rules

Class PruneEmptyRules.PruneEmptyRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<PruneEmptyRules.PruneEmptyRule.Config>

org.apache.calcite.rel.rules.PruneEmptyRules.PruneEmptyRule

All Implemented Interfaces:

SubstitutionRule, TransformationRule

Direct Known Subclasses:

PruneEmptyRules.RemoveEmptySingleRule

Enclosing class:

PruneEmptyRules

protected abstract static class PruneEmptyRules.PruneEmptyRule
extends RelRule<PruneEmptyRules.PruneEmptyRule.Config>
implements SubstitutionRule

Abstract prune empty rule that implements SubstitutionRule interface.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	PruneEmptyRules.PruneEmptyRule.Config	Rule configuration.

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelRule

RelRule.Done, RelRule.MatchHandler<R extends RelOptRule>, RelRule.OperandBuilder, RelRule.OperandDetailBuilder<R extends RelNode>, RelRule.OperandTransform

Nested classes/interfaces inherited from class org.apache.calcite.plan.RelOptRule

RelOptRule.ConverterRelOptRuleOperand

Field Summary

Fields inherited from class org.apache.calcite.plan.RelRule

config

Fields inherited from class org.apache.calcite.plan.RelOptRule

description, operands, relBuilderFactory

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PruneEmptyRule(PruneEmptyRules.PruneEmptyRule.Config config)

Method Summary

Modifier and Type	Method	Description
boolean	autoPruneOld()	Whether the planner should automatically prune old node when there is at least 1 equivalent rel generated by the rule.

Methods inherited from class org.apache.calcite.plan.RelOptRule

any, convert, convert, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, getOutConvention, getOutTrait, hashCode, matches, none, onMatch, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

PruneEmptyRule

protected PruneEmptyRule(PruneEmptyRules.PruneEmptyRule.Config config)

Method Details

autoPruneOld

public boolean autoPruneOld()

Description copied from interface: SubstitutionRule

Whether the planner should automatically prune old node when there is at least 1 equivalent rel generated by the rule.

Default is false, the user needs to prune the old node manually in the rule.

Specified by:

autoPruneOld in interface SubstitutionRule