org.apache.calcite.rex

Class RexProgram.Checker

java.lang.Object

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

org.apache.calcite.rex.RexChecker

org.apache.calcite.rex.RexProgram.Checker

All Implemented Interfaces:

RexVisitor<Boolean>

Enclosing class:

RexProgram

static class RexProgram.Checker
extends RexChecker

Visitor which walks over a program and checks validity.

Field Summary

Fields

Modifier and Type	Field and Description
private List<RelDataType>	internalExprTypeList

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

context, failCount, inputTypeList, litmus

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

deep

Constructor Summary

Constructors

Constructor and Description
Checker(RelDataType inputRowType, List<RelDataType> internalExprTypeList, RelNode.Context context, Litmus litmus) Creates a Checker.

Method Summary

Modifier and Type	Method and Description
Boolean	visitLocalRef(RexLocalRef localRef) Overrides RexChecker method, because RexLocalRef is is illegal in most rex expressions, but legal in a program.

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

getFailureCount, isValid, visitCall, visitCorrelVariable, visitFieldAccess, visitInputRef

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

visitArrayAnd, visitArrayOr, visitDynamicParam, 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

internalExprTypeList

private final List<RelDataType> internalExprTypeList

Constructor Detail

Checker

Checker(RelDataType inputRowType,
        List<RelDataType> internalExprTypeList,
        RelNode.Context context,
        Litmus litmus)

Creates a Checker.

Parameters:

inputRowType - Types of the input fields

internalExprTypeList - Types of the internal expressions

context - Context of the enclosing RelNode, or null

litmus - Whether to fail

Method Detail

visitLocalRef

public Boolean visitLocalRef(RexLocalRef localRef)

Overrides RexChecker method, because RexLocalRef is is illegal in most rex expressions, but legal in a program.

Specified by:

visitLocalRef in interface RexVisitor<Boolean>

Overrides:

visitLocalRef in class RexChecker