org.apache.calcite.plan

Class RelOptUtil.VariableUsedVisitor

java.lang.Object

org.apache.calcite.rex.RexShuttle

org.apache.calcite.plan.RelOptUtil.VariableUsedVisitor

All Implemented Interfaces:

RexVisitor<RexNode>

Enclosing class:

RelOptUtil

public static class RelOptUtil.VariableUsedVisitor
extends RexShuttle

Visitor that finds all variables used in an expression.

Field Summary

Fields

Modifier and Type	Field and Description
private RelShuttle	relShuttle
com.google.common.collect.Multimap<CorrelationId,Integer>	variableFields
Set<CorrelationId>	variables

Constructor Summary

Constructors

Constructor and Description
VariableUsedVisitor(RelShuttle relShuttle)

Method Summary

Modifier and Type	Method and Description
RexNode	visitCorrelVariable(RexCorrelVariable p)
RexNode	visitFieldAccess(RexFieldAccess fieldAccess)
RexNode	visitSubQuery(RexSubQuery subQuery)

Methods inherited from class org.apache.calcite.rex.RexShuttle

apply, apply, apply, mutate, visitArray, visitCall, visitDynamicParam, visitFieldCollations, visitInputRef, visitList, visitList, visitLiteral, visitLocalRef, visitOver, visitPatternFieldRef, visitRangeRef, visitTableInputRef, visitWindow

Methods inherited from class java.lang.Object

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

Field Detail

variables

public final Set<CorrelationId> variables

variableFields

public final com.google.common.collect.Multimap<CorrelationId,Integer> variableFields

relShuttle

private final RelShuttle relShuttle

Constructor Detail

VariableUsedVisitor

public VariableUsedVisitor(RelShuttle relShuttle)

Method Detail

visitCorrelVariable

public RexNode visitCorrelVariable(RexCorrelVariable p)

Specified by:

visitCorrelVariable in interface RexVisitor<RexNode>

Overrides:

visitCorrelVariable in class RexShuttle

visitFieldAccess

public RexNode visitFieldAccess(RexFieldAccess fieldAccess)

Specified by:

visitFieldAccess in interface RexVisitor<RexNode>

Overrides:

visitFieldAccess in class RexShuttle

visitSubQuery

public RexNode visitSubQuery(RexSubQuery subQuery)

Specified by:

visitSubQuery in interface RexVisitor<RexNode>

Overrides:

visitSubQuery in class RexShuttle