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

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.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

Field Summary
protected  String customPartitioner
           
 
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
POGlobalRearrange(OperatorKey k)
           
POGlobalRearrange(OperatorKey k, int rp)
           
POGlobalRearrange(OperatorKey k, int rp, List inp)
           
POGlobalRearrange(OperatorKey k, List inp)
           
 
Method Summary
 String getCustomPartitioner()
           
 Result getNext(Tuple t)
           
 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
attachInput, clone, cloneHelper, detachInput, getAlias, getAliasString, getDummy, getIllustrator, getInputs, getLogger, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getNext, getPigLogger, getRequestedParallelism, getResultType, isAccumStarted, isAccumulative, isInputAttached, processInput, reset, setAccumEnd, setAccumStart, setAccumulative, setAlias, 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

getNext

public Result getNext(Tuple t)
               throws ExecException
Overrides:
getNext in class PhysicalOperator
Throws:
ExecException

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


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