io.prestosql.sql.planner.iterative.rule

Class RemoveRedundantIdentityProjections

java.lang.Object

io.prestosql.sql.planner.iterative.rule.RemoveRedundantIdentityProjections

All Implemented Interfaces:

Rule<ProjectNode>

public class RemoveRedundantIdentityProjections
extends Object
implements Rule<ProjectNode>

Removes projection nodes that only perform non-renaming identity projections

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor and Description
RemoveRedundantIdentityProjections()

Method Summary

Modifier and Type	Method and Description
Rule.Result	apply(ProjectNode project, Captures captures, Rule.Context context)
Pattern<ProjectNode>	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.prestosql.sql.planner.iterative.Rule

isEnabled

Constructor Detail

RemoveRedundantIdentityProjections

public RemoveRedundantIdentityProjections()

Method Detail

getPattern

public Pattern<ProjectNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<ProjectNode>

apply

public Rule.Result apply(ProjectNode project,
                         Captures captures,
                         Rule.Context context)

Specified by:

apply in interface Rule<ProjectNode>