Package org.apache.calcite.sql2rel

Class CorrelationReferenceFinder

java.lang.Object

org.apache.calcite.rel.RelShuttleImpl

org.apache.calcite.rel.RelHomogeneousShuttle

org.apache.calcite.sql2rel.CorrelationReferenceFinder

All Implemented Interfaces:

RelShuttle

public abstract class CorrelationReferenceFinder
extends RelHomogeneousShuttle

Shuttle that finds references to a given CorrelationId within a tree of RelNodes.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	CorrelationReferenceFinder.MyRexVisitor	Replaces alternative names of correlation variable to its canonical name.

Field Summary

Fields

Modifier and Type	Field	Description
private CorrelationReferenceFinder.MyRexVisitor	rexVisitor

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

stack

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CorrelationReferenceFinder()	Creates CorrelationReferenceFinder.

Method Summary

Modifier and Type	Method	Description
protected abstract RexNode	handle(RexFieldAccess fieldAccess)
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

rexVisitor

private final CorrelationReferenceFinder.MyRexVisitor rexVisitor

Constructor Detail

CorrelationReferenceFinder

protected CorrelationReferenceFinder()

Creates CorrelationReferenceFinder.

Method Detail

handle

protected abstract RexNode handle(RexFieldAccess fieldAccess)

visit

public RelNode visit(RelNode other)

Specified by:

visit in interface RelShuttle

Overrides:

visit in class RelShuttleImpl