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

Class UseNonPartitionedJoinLookupSource

java.lang.Object

io.trino.sql.planner.iterative.rule.UseNonPartitionedJoinLookupSource

All Implemented Interfaces:

Rule<JoinNode>

public class UseNonPartitionedJoinLookupSource
extends Object
implements Rule<JoinNode>

Rule that transforms

     join
       probe
       build
         localExchange(partitioned)
 

into:

     join
       probe
       build
         localExchange(gather)
 

for small build sides. Avoiding partitioned exchange on the probe side improves LookupJoinOperator performance.

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
UseNonPartitionedJoinLookupSource()

Method Summary

Modifier and Type	Method	Description
Rule.Result	apply(JoinNode node, Captures captures, Rule.Context context)
Pattern<JoinNode>	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 Details

UseNonPartitionedJoinLookupSource

public UseNonPartitionedJoinLookupSource()

Method Details

getPattern

public Pattern<JoinNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<JoinNode>

isEnabled

public boolean isEnabled(Session session)

Specified by:

isEnabled in interface Rule<JoinNode>

apply

public Rule.Result apply(JoinNode node,
 Captures captures,
 Rule.Context context)

Specified by:

apply in interface Rule<JoinNode>