Package io.trino.sql.planner.iterative.rule

Class OptimizeDuplicateInsensitiveJoins

java.lang.Object

io.trino.sql.planner.iterative.rule.OptimizeDuplicateInsensitiveJoins

All Implemented Interfaces:

Rule<AggregationNode>

public class OptimizeDuplicateInsensitiveJoins
extends Object
implements Rule<AggregationNode>

For empty aggregations duplicate input rows can be skipped. This rule takes advantage of this fact and sets JoinNode.withMaySkipOutputDuplicates() for joins below such aggregation.

Nested Class Summary

Nested classes/interfaces inherited from interface io.trino.sql.planner.iterative.Rule

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
OptimizeDuplicateInsensitiveJoins(Metadata metadata)

Method Summary

Modifier and Type	Method	Description
Rule.Result	apply(AggregationNode aggregation, Captures captures, Rule.Context context)
Pattern<AggregationNode>	getPattern()	Returns a pattern to which plan nodes this rule applies.
boolean	isEnabled(Session session)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OptimizeDuplicateInsensitiveJoins

public OptimizeDuplicateInsensitiveJoins(Metadata metadata)

Method Detail

getPattern

public Pattern<AggregationNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<AggregationNode>

isEnabled

public boolean isEnabled(Session session)

Specified by:

isEnabled in interface Rule<AggregationNode>

apply

public Rule.Result apply(AggregationNode aggregation,
                         Captures captures,
                         Rule.Context context)

Specified by:

apply in interface Rule<AggregationNode>