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

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.POGlobalRearrange

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Operator>, Illustrable

public class POGlobalRearrange
extends PhysicalOperator

Dummy operator to test MRCompiler. This will be a local operator and its getNext methods have to be implemented

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

protected String

customPartitioner

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

alias, illustrator, input, inputAttached, inputs, lineageTracer, outputs, parentPlan, pigLogger, requestedParallelism, res, resultType

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

mKey

Constructor Summary

POGlobalRearrange(OperatorKey k)

POGlobalRearrange(OperatorKey k, int rp)

POGlobalRearrange(OperatorKey k, int rp, List inp)

POGlobalRearrange(OperatorKey k, List inp)

Method Summary

String	getCustomPartitioner()
Tuple	illustratorMarkup(Object in, Object out, int eqClassIndex) input tuple mark up to be illustrate-able
boolean	isBlocking() A blocking operator should override this to return true.
String	name()
void	setCustomPartitioner(String customPartitioner)
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, detachInput, getAlias, getAliasString, getIllustrator, getInputs, getLogger, getNext, getNextBigDecimal, getNextBigInteger, getNextBoolean, getNextDataBag, getNextDataByteArray, getNextDateTime, getNextDouble, getNextFloat, getNextInteger, getNextLong, getNextMap, getNextString, getNextTuple, getOriginalLocations, getPigLogger, getReporter, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setIllustrator, 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

Field Detail

customPartitioner

protected String customPartitioner

Constructor Detail

POGlobalRearrange

public POGlobalRearrange(OperatorKey k)

POGlobalRearrange

public POGlobalRearrange(OperatorKey k,
                         int rp)

POGlobalRearrange

public POGlobalRearrange(OperatorKey k,
                         List inp)

POGlobalRearrange

public POGlobalRearrange(OperatorKey k,
                         int rp,
                         List inp)

Method Detail

getCustomPartitioner

public String getCustomPartitioner()

setCustomPartitioner

public void setCustomPartitioner(String customPartitioner)

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 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.

isBlocking

public boolean isBlocking()

Description copied from class: PhysicalOperator

A blocking operator should override this to return true. Blocking operators are those that need the full bag before operate on the tuples inside the bag. Example is the Global Rearrange. Non-blocking or pipeline operators are those that work on a tuple by tuple basis.

Overrides:

isBlocking in class PhysicalOperator

Returns:

true if blocking and false otherwise

illustratorMarkup

public Tuple illustratorMarkup(Object in,
                               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