org.apache.calcite.rel.rules

Class AggregateFilterTransposeRule

java.lang.Object

org.apache.calcite.plan.RelOptRule

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

org.apache.calcite.rel.rules.AggregateFilterTransposeRule

All Implemented Interfaces:

TransformationRule

@Value.Enclosing
public class AggregateFilterTransposeRule
extends RelRule<AggregateFilterTransposeRule.Config>
implements TransformationRule

Planner rule that matches an Aggregate on a Filter and transposes them, pushing the aggregate below the filter.

In some cases, it is necessary to split the aggregate.

This rule does not directly improve performance. The aggregate will have to process more rows, to produce aggregated rows that will be thrown away. The rule might be beneficial if the predicate is very expensive to evaluate. The main use of the rule is to match a query that has a filter under an aggregate to an existing aggregate table.

See Also:

FilterAggregateTransposeRule, CoreRules.AGGREGATE_FILTER_TRANSPOSE

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	AggregateFilterTransposeRule.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 and Description
protected	AggregateFilterTransposeRule(AggregateFilterTransposeRule.Config config) Creates an AggregateFilterTransposeRule.
	AggregateFilterTransposeRule(RelOptRuleOperand operand, RelBuilderFactory relBuilderFactory) Deprecated.

Method Summary

Modifier and Type	Method and Description
void	onMatch(RelOptRuleCall call) Receives notification about a rule match.

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

any, 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

Constructor Detail

AggregateFilterTransposeRule

protected AggregateFilterTransposeRule(AggregateFilterTransposeRule.Config config)

Creates an AggregateFilterTransposeRule.

AggregateFilterTransposeRule

@Deprecated
public AggregateFilterTransposeRule(RelOptRuleOperand operand,
                                                RelBuilderFactory relBuilderFactory)

Deprecated.

Method Detail

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)