org.apache.calcite.rex

Class RexUtil.ForwardRefFinder

java.lang.Object

org.apache.calcite.rex.RexVisitorImpl<Void>

org.apache.calcite.rex.RexUtil.ForwardRefFinder

All Implemented Interfaces:

RexVisitor<Void>

Enclosing class:

RexUtil

private static class RexUtil.ForwardRefFinder
extends RexVisitorImpl<Void>

Walks over an expression and throws an exception if it finds an RexInputRef with an ordinal beyond the number of fields in the input row type, or a RexLocalRef with ordinal greater than that set using setLimit(int).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
(package private) static class	RexUtil.ForwardRefFinder.IllegalForwardRefException Thrown to abort a visit when we find an illegal forward reference.

Field Summary

Fields

Modifier and Type	Field and Description
private RelDataType	inputRowType
private int	limit

Fields inherited from class org.apache.calcite.rex.RexVisitorImpl

deep

Constructor Summary

Constructors

Constructor and Description
ForwardRefFinder(RelDataType inputRowType)

Method Summary

Modifier and Type	Method and Description
void	setLimit(int limit)
Void	visitInputRef(RexInputRef inputRef)
Void	visitLocalRef(RexLocalRef inputRef)

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

visitArrayAnd, visitArrayOr, visitCall, visitCorrelVariable, visitDynamicParam, visitFieldAccess, visitLiteral, visitOver, visitPatternFieldRef, visitRangeRef, visitSubQuery, visitTableInputRef

Methods inherited from class java.lang.Object

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

Field Detail

limit

private int limit

inputRowType

private final RelDataType inputRowType

Constructor Detail

ForwardRefFinder

ForwardRefFinder(RelDataType inputRowType)

Method Detail

visitInputRef

public Void visitInputRef(RexInputRef inputRef)

Specified by:

visitInputRef in interface RexVisitor<Void>

Overrides:

visitInputRef in class RexVisitorImpl<Void>

visitLocalRef

public Void visitLocalRef(RexLocalRef inputRef)

Specified by:

visitLocalRef in interface RexVisitor<Void>

Overrides:

visitLocalRef in class RexVisitorImpl<Void>

setLimit

public void setLimit(int limit)