Package org.apache.calcite.rel.rules

Class AggregateRemoveRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

org.apache.calcite.plan.RelRule<AggregateRemoveRule.Config>

org.apache.calcite.rel.rules.AggregateRemoveRule

All Implemented Interfaces:

SubstitutionRule, TransformationRule

@Enclosing
public class AggregateRemoveRule
extends RelRule<AggregateRemoveRule.Config>
implements SubstitutionRule

Planner rule that removes a Aggregate if it computes no aggregate functions (that is, it is implementing SELECT DISTINCT), or all the aggregate functions are splittable, and the underlying relational expression is already distinct.

See Also:

• CoreRules.AGGREGATE_REMOVE

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	AggregateRemoveRule.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
	AggregateRemoveRule(Class<? extends Aggregate> aggregateClass)	Deprecated.
	AggregateRemoveRule(Class<? extends Aggregate> aggregateClass, RelBuilderFactory relBuilderFactory)	Deprecated.
protected	AggregateRemoveRule(AggregateRemoveRule.Config config)	Creates an AggregateRemoveRule.

Method Summary

Modifier and Type	Method	Description
static boolean	canFlattenStatic(AggregateCall aggregateCall)	As canFlatten(org.apache.calcite.rel.core.AggregateCall), but only allows static aggregate functions.
void	onMatch(RelOptRuleCall call)	Receives notification about a rule match.

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, 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

Methods inherited from interface org.apache.calcite.rel.rules.SubstitutionRule

autoPruneOld

Constructor Details

AggregateRemoveRule

protected AggregateRemoveRule(AggregateRemoveRule.Config config)

Creates an AggregateRemoveRule.

AggregateRemoveRule

@Deprecated
public AggregateRemoveRule(Class<? extends Aggregate> aggregateClass)

Deprecated.

AggregateRemoveRule

@Deprecated
public AggregateRemoveRule(Class<? extends Aggregate> aggregateClass,
 RelBuilderFactory relBuilderFactory)

Deprecated.

Method Details

canFlattenStatic

public static boolean canFlattenStatic(AggregateCall aggregateCall)

As canFlatten(org.apache.calcite.rel.core.AggregateCall), but only allows static aggregate functions.

onMatch

public void onMatch(RelOptRuleCall call)

Description copied from class: RelOptRule

Receives notification about a rule match. At the time that this method is called, call.rels holds the set of relational expressions which match the operands to the rule; call.rels[0] is the root expression.

Typically a rule would check that the nodes are valid matches, creates a new expression, then calls back RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map<org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode>, org.apache.calcite.plan.RelHintsPropagator) to register the expression.

Specified by:

onMatch in class RelOptRule

Parameters:

call - Rule call

See Also:

• RelOptRule.matches(RelOptRuleCall)