com.facebook.presto.sql.planner.iterative.rule

Class PushOffsetThroughProject

java.lang.Object

com.facebook.presto.sql.planner.iterative.rule.PushOffsetThroughProject

All Implemented Interfaces:

Rule<OffsetNode>

public class PushOffsetThroughProject
extends Object
implements Rule<OffsetNode>

Transforms:

 - Offset
    - Project (non identity)
 

Into:

 - Project (non identity)
    - Offset
 

Nested Class Summary

Nested classes/interfaces inherited from interface com.facebook.presto.sql.planner.iterative.Rule

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor and Description
PushOffsetThroughProject()

Method Summary

Modifier and Type	Method and Description
Rule.Result	apply(OffsetNode parent, Captures captures, Rule.Context context)
Pattern<OffsetNode>	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

PushOffsetThroughProject

public PushOffsetThroughProject()

Method Detail

isEnabled

public boolean isEnabled(Session session)

Specified by:

isEnabled in interface Rule<OffsetNode>

getPattern

public Pattern<OffsetNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<OffsetNode>

apply

public Rule.Result apply(OffsetNode parent,
                         Captures captures,
                         Rule.Context context)

Specified by:

apply in interface Rule<OffsetNode>