public class UnionOperator extends Operator<UnionDesc> implements java.io.Serializable
Operator.OperatorFunc, Operator.ProgressCounter, Operator.State
alias, beginTime, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, counterNames, counterNameToEnum, counters, done, fatalErrorCntr, groupKeyObject, id, inputObjInspectors, inputRows, isLogInfoEnabled, LOG, numInputRowsCntr, numOutputRowsCntr, operatorId, out, outputObjInspector, outputRows, parentOperators, reporter, state, statsMap, timeTakenCntr, totalTime
Constructor and Description |
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UnionOperator() |
Modifier and Type | Method and Description |
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java.lang.String |
getName()
Implements the getName function for the Node Interface.
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static java.lang.String |
getOperatorName() |
OperatorType |
getType()
Return the type of the specific operator among the
types in OperatorType.
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protected void |
initializeOp(Configuration hconf)
UnionOperator will transform the input rows if the inputObjInspectors from
different parents are different.
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boolean |
opAllowedAfterMapJoin() |
boolean |
opAllowedBeforeMapJoin()
Union operators are not allowed either before or after a explicit mapjoin hint.
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boolean |
opAllowedBeforeSortMergeJoin() |
void |
processOp(java.lang.Object row,
int tag)
Process the row.
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acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, assignCounterNameToEnum, augmentPlan, checkFatalErrors, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, close, closeOp, columnNamesRowResolvedCanBeObtained, dump, dump, endGroup, fatalErrorMessage, flush, forward, getAdditionalCounters, getChildOperators, getChildren, getColumnExprMap, getConf, getConfiguration, getCounterNames, getCounterNameToEnum, getCounters, getDone, getExecContext, getGroupKeyObject, getIdentifier, getInputObjInspectors, getNextCntr, getNumChild, getNumParent, getOperatorId, getParentOperators, getSchema, getStats, getWrappedCounterName, incrCounter, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeCounters, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, jobCloseOp, logStats, opAllowedConvertMapJoin, passExecContext, preorderMap, process, processGroup, removeChild, removeChildAndAdoptItsChildren, removeChildren, removeParent, replaceChild, replaceParent, reset, resetId, resetLastEnumUsed, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setCounterNames, setCounterNameToEnum, setDone, setExecContext, setGroupKeyObject, setId, setInputObjInspectors, setOperatorId, setOutputCollector, setParentOperators, setReporter, setSchema, setUseBucketizedHiveInputFormat, startGroup, supportAutomaticSortMergeJoin, supportSkewJoinOptimization, supportUnionRemoveOptimization, toString, toString, updateCounters
protected void initializeOp(Configuration hconf) throws HiveException
initializeOp
in class Operator<UnionDesc>
HiveException
public void processOp(java.lang.Object row, int tag) throws HiveException
Operator
processOp
in class Operator<UnionDesc>
row
- The object representing the row.tag
- The tag of the row usually means which parent this row comes from.
Rows with the same tag should have exactly the same rowInspector
all the time.HiveException
public java.lang.String getName()
Operator
public static java.lang.String getOperatorName()
public OperatorType getType()
Operator
public boolean opAllowedBeforeMapJoin()
opAllowedBeforeMapJoin
in class Operator<UnionDesc>
public boolean opAllowedAfterMapJoin()
opAllowedAfterMapJoin
in class Operator<UnionDesc>
public boolean opAllowedBeforeSortMergeJoin()
opAllowedBeforeSortMergeJoin
in class Operator<UnionDesc>
Copyright © 2012 The Apache Software Foundation