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

Class POCross

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.relationalOperators.POCross

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Comparable<Operator>, Illustrable

public class POCross
extends PhysicalOperator

Recover this class for nested cross operation.

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

Modifier and Type	Field and Description
protected Tuple[]	data
protected DataBag[]	inputBags
protected java.util.Iterator<Tuple>[]	its
protected Tuple	tupleOfLastBag

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

alias, illustrator, input, inputAttached, inputs, lineageTracer, 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
POCross(OperatorKey k)
POCross(OperatorKey k, int rp)
POCross(OperatorKey k, int rp, java.util.List<PhysicalOperator> inp)
POCross(OperatorKey k, java.util.List<PhysicalOperator> inp)

Method Summary

Methods

Modifier and Type	Method and Description
Result	getNextTuple()
Tuple	illustratorMarkup(java.lang.Object in, java.lang.Object out, int eqClassIndex) input tuple mark up to be illustrate-able
java.lang.String	name()
boolean	supportsMultipleInputs() Indicates whether this operator supports multiple inputs.
boolean	supportsMultipleOutputs() Indicates whether this operator supports multiple outputs.
void	visit(PhyPlanVisitor v) Visit this node with the provided visitor.

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

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

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

Field Detail

inputBags

protected DataBag[] inputBags

data

protected Tuple[] data

its

protected transient java.util.Iterator<Tuple>[] its

tupleOfLastBag

protected Tuple tupleOfLastBag

Constructor Detail

POCross

public POCross(OperatorKey k)

POCross

public POCross(OperatorKey k,
       int rp,
       java.util.List<PhysicalOperator> inp)

POCross

public POCross(OperatorKey k,
       int rp)

POCross

public POCross(OperatorKey k,
       java.util.List<PhysicalOperator> inp)

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 PhysicalOperator

Parameters:

v - Visitor to visit with.

Throws:

VisitorException - if the visitor has a problem.

name

public java.lang.String name()

Specified by:

name in class Operator<PhyPlanVisitor>

supportsMultipleInputs

public boolean supportsMultipleInputs()

Description copied from class: Operator

Indicates whether this operator supports multiple inputs.

Specified by:

supportsMultipleInputs in class Operator<PhyPlanVisitor>

Returns:

true if it does, otherwise false.

supportsMultipleOutputs

public boolean supportsMultipleOutputs()

Description copied from class: Operator

Indicates whether this operator supports multiple outputs.

Specified by:

supportsMultipleOutputs in class Operator<PhyPlanVisitor>

Returns:

true if it does, otherwise false.

illustratorMarkup

public Tuple illustratorMarkup(java.lang.Object in,
                      java.lang.Object out,
                      int eqClassIndex)

Description copied from interface: Illustrable

input tuple mark up to be illustrate-able

Parameters:

in - input tuple

out - output tuple before wrapped in ExampleTuple

eqClassIndex - index into equivalence classes in illustrator

Returns:

tuple

getNextTuple

public Result getNextTuple()
                    throws ExecException

Overrides:

getNextTuple in class PhysicalOperator

Throws:

ExecException