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

Class PruneProjectColumns

java.lang.Object

com.facebook.presto.sql.planner.iterative.rule.ProjectOffPushDownRule<ProjectNode>

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

All Implemented Interfaces:

Rule<ProjectNode>

public class PruneProjectColumns
extends ProjectOffPushDownRule<ProjectNode>

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
PruneProjectColumns()

Method Summary

Modifier and Type	Method and Description
protected Optional<PlanNode>	pushDownProjectOff(PlanNodeIdAllocator idAllocator, PlanVariableAllocator variableAllocator, ProjectNode childProjectNode, Set<VariableReferenceExpression> referencedOutputs)

Methods inherited from class com.facebook.presto.sql.planner.iterative.rule.ProjectOffPushDownRule

apply, getPattern

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.facebook.presto.sql.planner.iterative.Rule

isEnabled

Constructor Detail

PruneProjectColumns

public PruneProjectColumns()

Method Detail

pushDownProjectOff

protected Optional<PlanNode> pushDownProjectOff(PlanNodeIdAllocator idAllocator,
                                                PlanVariableAllocator variableAllocator,
                                                ProjectNode childProjectNode,
                                                Set<VariableReferenceExpression> referencedOutputs)

Specified by:

pushDownProjectOff in class ProjectOffPushDownRule<ProjectNode>