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

Class PruneTableScanColumns

java.lang.Object

io.trino.sql.planner.iterative.rule.ProjectOffPushDownRule<TableScanNode>

io.trino.sql.planner.iterative.rule.PruneTableScanColumns

All Implemented Interfaces:

Rule<ProjectNode>

public class PruneTableScanColumns
extends ProjectOffPushDownRule<TableScanNode>

This is a special case of PushProjectionIntoTableScan that performs only column pruning.

Nested Class Summary

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

Rule.Context, Rule.Result

Constructor Summary

Constructors

Constructor	Description
PruneTableScanColumns(Metadata metadata)

Method Summary

Modifier and Type	Method	Description
static Optional<PlanNode>	pruneColumns(Metadata metadata, TypeProvider types, Session session, TableScanNode node, Set<Symbol> referencedOutputs)
protected Optional<PlanNode>	pushDownProjectOff(Rule.Context context, TableScanNode node, Set<Symbol> referencedOutputs)

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

isEnabled

Constructor Detail

PruneTableScanColumns

public PruneTableScanColumns(Metadata metadata)

Method Detail

pushDownProjectOff

protected Optional<PlanNode> pushDownProjectOff(Rule.Context context,
                                                TableScanNode node,
                                                Set<Symbol> referencedOutputs)

Specified by:

pushDownProjectOff in class ProjectOffPushDownRule<TableScanNode>

pruneColumns

public static Optional<PlanNode> pruneColumns(Metadata metadata,
                                              TypeProvider types,
                                              Session session,
                                              TableScanNode node,
                                              Set<Symbol> referencedOutputs)