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

java.lang.Object
  extended by org.apache.pig.impl.plan.Operator<PhyPlanVisitor>
      extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
          extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.ExpressionOperator
              extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryExpressionOperator
                  extended by org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.UnaryComparisonOperator
                      extended by 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

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, dummyBag, dummyBool, dummyDBA, dummyDouble, dummyFloat, dummyInt, dummyLong, dummyMap, dummyString, dummyTuple, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, reporter, requestedParallelism, res, resultType
 
Fields inherited from class org.apache.pig.impl.plan.Operator
mKey
 
Constructor Summary
POIsNull(OperatorKey k)
           
POIsNull(OperatorKey k, int rp)
           
POIsNull(OperatorKey k, int rp, ExpressionOperator in)
           
 
Method Summary
 POIsNull clone()
          Make a deep copy of this operator.
 Result getNext(Boolean b)
           
 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
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, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, accumChild, containUDF, getNext, setIllustrator, supportsMultipleOutputs
 
Methods inherited from class org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator
attachInput, cloneHelper, detachInput, getAlias, getAliasString, getDummy, getIllustrator, getInputs, getLogger, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getPigLogger, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isBlocking, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setAlias, setInputs, setParentPlan, setPigLogger, setReporter, setRequestedParallelism, setResultType
 
Methods inherited from class org.apache.pig.impl.plan.Operator
compareTo, equals, getOperatorKey, getProjectionMap, hashCode, regenerateProjectionMap, rewire, toString, 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
getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext
 

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>

getNext

public Result getNext(Boolean b)
               throws ExecException
Specified by:
getNext in interface ComparisonOperator
Overrides:
getNext 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}


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