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

Class ReplaceRedundantJoinWithSource

java.lang.Object

io.trino.sql.planner.iterative.rule.ReplaceRedundantJoinWithSource

All Implemented Interfaces:

Rule<JoinNode>

public class ReplaceRedundantJoinWithSource
extends Object
implements Rule<JoinNode>

This rule transforms plans with joins, where: - one of the sources is scalar and produces no output symbols. In case of LEFT or RIGHT join, it has to be the inner source. In case of FULL or INNER join, it can be either source. - the other join source is at least scalar (not known to be empty).

The join is replaced with the other source and an optional pruning projection.

Note: This rule does not transform plans where either join source is empty. Such plans are transformed by RemoveRedundantJoin and ReplaceRedundantJoinWithProject rules.

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
ReplaceRedundantJoinWithSource()

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.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.sql.planner.iterative.Rule

isEnabled

Constructor Detail

ReplaceRedundantJoinWithSource

public ReplaceRedundantJoinWithSource()

Method Detail

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>

apply

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

Specified by:

apply in interface Rule<JoinNode>