com.bigdata.bop.controller

Class Union

java.lang.Object

com.bigdata.bop.CoreBaseBOp

com.bigdata.bop.BOpBase

com.bigdata.bop.PipelineOp

com.bigdata.bop.controller.AbstractSubqueryOp

com.bigdata.bop.controller.Union

All Implemented Interfaces:

BOp, IPropertySet, Serializable, Cloneable

public class Union
extends AbstractSubqueryOp

UNION()[maxParallel(default all); subqueries=ops]

 UNION([],{subqueries=[a,b,c]})
 

Will run the subqueries a, b, and c in parallel for each source IBindingSet. The output of those subqueries will be routed to the UNION operator (their parent).

Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.bop.controller.AbstractSubqueryOp

AbstractSubqueryOp.Annotations

Field Summary

Fields inherited from class com.bigdata.bop.CoreBaseBOp

DEFAULT_INITIAL_CAPACITY

Fields inherited from interface com.bigdata.bop.BOp

NOANNS, NOARGS

Constructor Summary

Constructors

Constructor and Description
Union(BOp[] args, Map<String,Object> annotations) Shallow copy constructor.
Union(BOp[] args, NV... annotations)
Union(Union op) Deep copy constructor.

Method Summary

Methods inherited from class com.bigdata.bop.controller.AbstractSubqueryOp

eval, getMaxParallelSubqueries

Methods inherited from class com.bigdata.bop.PipelineOp

assertAtOnceJavaHeapOp, assertMaxParallelOne, getChunkCapacity, getChunkOfChunksCapacity, getChunkTimeout, getMaxMemory, getMaxParallel, isAtOnceEvaluation, isBlockedEvaluation, isLastPassRequested, isPipelinedEvaluation, isReorderSolutions, isSharedState, newStats

Methods inherited from class com.bigdata.bop.BOpBase

__replaceArg, _clearProperty, _set, _setProperty, annotations, annotationsCopy, annotationsEqual, annotationsRef, argIterator, args, argsCopy, arity, clearAnnotations, clearProperty, deepCopy, deepCopy, get, getProperty, setArg, setProperty, setUnboundProperty, toArray, toArray

Methods inherited from class com.bigdata.bop.CoreBaseBOp

annotationsEqual, annotationsToString, annotationsToString, annotationValueToString, checkArgs, clone, equals, getEvaluationContext, getId, getProperty, getRequiredProperty, hashCode, indent, isController, mutation, shortenName, toShortString, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Union

public Union(Union op)

Deep copy constructor.

Parameters:

op -

Union

public Union(BOp[] args,
     Map<String,Object> annotations)

Shallow copy constructor.

Parameters:

args -

annotations -

Union

public Union(BOp[] args,
     NV... annotations)