org.apache.calcite.rex

Class RexUtil.ConstantFinder

java.lang.Object

org.apache.calcite.rex.RexUtil.ConstantFinder

All Implemented Interfaces:

RexVisitor<Boolean>

Direct Known Subclasses:

RexProgram.ConstantFinder

Enclosing class:

RexUtil

static class RexUtil.ConstantFinder
extends Object
implements RexVisitor<Boolean>

Walks over an expression and determines whether it is constant.

Field Summary

Fields

Modifier and Type	Field and Description
(package private) static RexUtil.ConstantFinder	INSTANCE

Constructor Summary

Constructors

Constructor and Description
ConstantFinder()

Method Summary

Modifier and Type	Method and Description
Boolean	visitCall(RexCall call)
Boolean	visitCorrelVariable(RexCorrelVariable correlVariable)
Boolean	visitDynamicParam(RexDynamicParam dynamicParam)
Boolean	visitFieldAccess(RexFieldAccess fieldAccess)
Boolean	visitInputRef(RexInputRef inputRef)
Boolean	visitLiteral(RexLiteral literal)
Boolean	visitLocalRef(RexLocalRef localRef)
Boolean	visitOver(RexOver over)
Boolean	visitPatternFieldRef(RexPatternFieldRef fieldRef)
Boolean	visitRangeRef(RexRangeRef rangeRef)
Boolean	visitSubQuery(RexSubQuery subQuery)
Boolean	visitTableInputRef(RexTableInputRef ref)

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

static final RexUtil.ConstantFinder INSTANCE

Constructor Detail

ConstantFinder

ConstantFinder()

Method Detail

visitLiteral

public Boolean visitLiteral(RexLiteral literal)

Specified by:

visitLiteral in interface RexVisitor<Boolean>

visitInputRef

public Boolean visitInputRef(RexInputRef inputRef)

Specified by:

visitInputRef in interface RexVisitor<Boolean>

visitLocalRef

public Boolean visitLocalRef(RexLocalRef localRef)

Specified by:

visitLocalRef in interface RexVisitor<Boolean>

visitOver

public Boolean visitOver(RexOver over)

Specified by:

visitOver in interface RexVisitor<Boolean>

visitSubQuery

public Boolean visitSubQuery(RexSubQuery subQuery)

Specified by:

visitSubQuery in interface RexVisitor<Boolean>

visitTableInputRef

public Boolean visitTableInputRef(RexTableInputRef ref)

Specified by:

visitTableInputRef in interface RexVisitor<Boolean>

visitPatternFieldRef

public Boolean visitPatternFieldRef(RexPatternFieldRef fieldRef)

Specified by:

visitPatternFieldRef in interface RexVisitor<Boolean>

visitCorrelVariable

public Boolean visitCorrelVariable(RexCorrelVariable correlVariable)

Specified by:

visitCorrelVariable in interface RexVisitor<Boolean>

visitDynamicParam

public Boolean visitDynamicParam(RexDynamicParam dynamicParam)

Specified by:

visitDynamicParam in interface RexVisitor<Boolean>

visitCall

public Boolean visitCall(RexCall call)

Specified by:

visitCall in interface RexVisitor<Boolean>

visitRangeRef

public Boolean visitRangeRef(RexRangeRef rangeRef)

Specified by:

visitRangeRef in interface RexVisitor<Boolean>

visitFieldAccess

public Boolean visitFieldAccess(RexFieldAccess fieldAccess)

Specified by:

visitFieldAccess in interface RexVisitor<Boolean>