org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators

Class POIsNull

java.lang.Object

org.apache.pig.impl.plan.Operator<PhyPlanVisitor>

org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryExpressionOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryComparisonOperator

org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POIsNull

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Operator>, ComparisonOperator, Illustrable

public class POIsNull
extends UnaryComparisonOperator

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

PhysicalOperator.OriginalLocation

Field Summary

Fields inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryComparisonOperator

operandType

Fields inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

alias, illustrator, input, inputAttached, inputs, lineageTracer, mBagFactory, mTupleFactory, outputs, parentPlan, pigLogger, reporter, requestedParallelism, res, RESULT_EMPTY, RESULT_EOP, resultType

Fields inherited from class org.apache.pig.impl.plan.Operator

mKey

Constructor Summary

Constructors

Constructor and Description
POIsNull(OperatorKey k)
POIsNull(OperatorKey k, int rp)
POIsNull(OperatorKey k, int rp, ExpressionOperator in)

Method Summary

Modifier and Type	Method and Description
POIsNull	clone() Make a deep copy of this operator.
Result	getNextBoolean()
String	name()
void	visit(PhyPlanVisitor v) Visit this node with the provided visitor.

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryComparisonOperator

cloneHelper, getOperandType, illustratorMarkup, setOperandType

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryExpressionOperator

cloneHelper, getChildExpressions, getExpr, setExpr, setInputAsExpr, supportsMultipleInputs

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator

accumChild, containUDF, getNextDataBag, setIllustrator, supportsMultipleOutputs, toString

Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator

addOriginalLocation, addOriginalLocation, attachInput, cloneHelper, clonePlans, copyAliasFrom, detachInput, getAlias, getAliasString, getIllustrator, getInputs, getLogger, getNext, getNextBigDecimal, getNextBigInteger, getNextDataByteArray, getNextDateTime, getNextDouble, getNextFloat, getNextInteger, getNextLong, getNextMap, getNextString, getNextTuple, getOriginalLocations, getParentPlan, getPigLogger, getReporter, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isBlocking, isEndOfAllInput, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setInputs, setParentPlan, setPigLogger, setReporter, setRequestedParallelism, setResultType, staticDataCleanup

Methods inherited from class org.apache.pig.impl.plan.Operator

compareTo, equals, getOperatorKey, getProjectionMap, hashCode, regenerateProjectionMap, rewire, unsetProjectionMap

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ComparisonOperator

getNextDataBag, getNextDataByteArray, getNextDateTime, getNextDouble, getNextFloat, getNextInteger, getNextLong, getNextMap, getNextString, getNextTuple

Constructor Detail

POIsNull

public POIsNull(OperatorKey k,
                int rp)

POIsNull

public POIsNull(OperatorKey k)

POIsNull

public POIsNull(OperatorKey k,
                int rp,
                ExpressionOperator in)

Method Detail

visit

public void visit(PhyPlanVisitor v)
           throws VisitorException

Description copied from class: Operator

Visit this node with the provided visitor. This should only be called by the visitor class itself, never directly.

Specified by:

visit in class ExpressionOperator

Parameters:

v - Visitor to visit with.

Throws:

VisitorException - if the visitor has a problem.

name

public String name()

Specified by:

name in class Operator<PhyPlanVisitor>

getNextBoolean

public Result getNextBoolean()
                      throws ExecException

Specified by:

getNextBoolean in interface ComparisonOperator

Overrides:

getNextBoolean in class PhysicalOperator

Throws:

ExecException

clone

public POIsNull clone()
               throws CloneNotSupportedException

Description copied from class: ExpressionOperator

Make a deep copy of this operator. This is declared here to make it possible to call clone on ExpressionOperators.

Overrides:

clone in class ExpressionOperator

Throws:

CloneNotSupportedException

See Also:

Do not use the clone method directly. Operators are cloned when logical plans are cloned using {@link LogicalPlanCloner}