org.apache.calcite.plan

Class RelOptUtil.CorrelationCollector

java.lang.Object

org.apache.calcite.rel.RelShuttleImpl

org.apache.calcite.rel.RelHomogeneousShuttle

org.apache.calcite.plan.RelOptUtil.CorrelationCollector

All Implemented Interfaces:

RelShuttle

Enclosing class:

RelOptUtil

private static class RelOptUtil.CorrelationCollector
extends RelHomogeneousShuttle

Shuttle that finds correlation variables inside a given relational expression, including those that are inside sub-queries.

Field Summary

Fields

Modifier and Type	Field and Description
private RelOptUtil.VariableUsedVisitor	vuv

Fields inherited from class org.apache.calcite.rel.RelShuttleImpl

stack

Constructor Summary

Constructors

Modifier	Constructor and Description
private	CorrelationCollector()

Method Summary

Modifier and Type	Method and Description
RelNode	visit(RelNode other)

Methods inherited from class org.apache.calcite.rel.RelHomogeneousShuttle

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class org.apache.calcite.rel.RelShuttleImpl

visitChild, visitChildren

Methods inherited from class java.lang.Object

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

Field Detail

vuv

private final RelOptUtil.VariableUsedVisitor vuv

Constructor Detail

CorrelationCollector

private CorrelationCollector()

Method Detail

visit

public RelNode visit(RelNode other)

Specified by:

visit in interface RelShuttle

Overrides:

visit in class RelShuttleImpl