Package io.prestosql.sql.planner.iterative.rule

Class PruneApplyCorrelation

java.lang.Object

io.prestosql.sql.planner.iterative.rule.PruneApplyCorrelation

All Implemented Interfaces:

Rule<ApplyNode>

public class PruneApplyCorrelation
extends Object
implements Rule<ApplyNode>

This rule updates ApplyNode's correlation list. A symbol can be removed from the correlation list if it is not referenced by the subquery node. Note: This rule does not restrict ApplyNode's children outputs. It requires additional information about context (symbols required by the outer plan) and is done in PruneApplyColumns rule.

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
PruneApplyCorrelation()

Method Summary

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

PruneApplyCorrelation

public PruneApplyCorrelation()

Method Detail

getPattern

public Pattern<ApplyNode> getPattern()

Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<ApplyNode>

apply

public Rule.Result apply(ApplyNode applyNode,
                         Captures captures,
                         Rule.Context context)

Specified by:

apply in interface Rule<ApplyNode>