public class UnionOperator extends Operator<UnionDesc> implements Serializable
Operator.OperatorFunc, Operator.State
abortOp, alias, asyncInitOperations, cContext, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, CONTEXT_NAME_KEY, done, groupKeyObject, HIVECOUNTERCREATEDFILES, HIVECOUNTERFATAL, id, indexForTezUnion, inputObjInspectors, isLogDebugEnabled, isLogInfoEnabled, isLogTraceEnabled, LOG, operatorId, out, outputObjInspector, parentOperators, PLOG, reporter, runTimeNumRows, state, statsMap
Modifier | Constructor and Description |
---|---|
protected |
UnionOperator()
Kryo ctor.
|
|
UnionOperator(CompilationOpContext ctx) |
Modifier and Type | Method and Description |
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String |
getName()
Gets the name of the node.
|
static String |
getOperatorName() |
OperatorType |
getType()
Return the type of the specific operator among the
types in OperatorType.
|
protected void |
initializeOp(org.apache.hadoop.conf.Configuration hconf)
UnionOperator will transform the input rows if the inputObjInspectors from
different parents are different.
|
boolean |
opAllowedAfterMapJoin() |
boolean |
opAllowedBeforeMapJoin()
Union operators are not allowed either before or after a explicit mapjoin hint.
|
boolean |
opAllowedBeforeSortMergeJoin() |
void |
process(Object row,
int tag)
Process the row.
|
abort, acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, augmentPlan, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, cloneOp, cloneRecursiveChildren, close, closeOp, columnNamesRowResolvedCanBeObtained, completeInitializationOp, createDummy, defaultEndGroup, defaultStartGroup, dump, dump, endGroup, flush, forward, getAdditionalCounters, getChildOperators, getChildren, getColumnExprMap, getCompilationOpContext, getConf, getConfiguration, getDone, getExecContext, getGroupKeyObject, getIdentifier, getIndexForTezUnion, getInputObjInspectors, getIsReduceSink, getNextCntr, getNumChild, getNumParent, getOperatorId, getOpTraits, getOutputObjInspector, getParentOperators, getReduceOutputName, getSchema, getStatistics, getStats, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, jobCloseOp, logStats, opAllowedConvertMapJoin, passExecContext, preorderMap, processGroup, removeChild, removeChildAndAdoptItsChildren, removeParent, removeParents, replaceChild, replaceParent, reset, resetStats, setAlias, setChildOperators, setColumnExprMap, setCompilationOpContext, setConf, setDone, setExecContext, setGroupKeyObject, setId, setIndexForTezUnion, setInputContext, setInputObjInspectors, setOperatorId, setOpTraits, setOutputCollector, setParentOperators, setReporter, setSchema, setStatistics, setUseBucketizedHiveInputFormat, startGroup, supportAutomaticSortMergeJoin, supportSkewJoinOptimization, supportUnionRemoveOptimization, toString, toString
protected UnionOperator()
public UnionOperator(CompilationOpContext ctx)
protected void initializeOp(org.apache.hadoop.conf.Configuration hconf) throws HiveException
initializeOp
in class Operator<UnionDesc>
HiveException
public void process(Object row, int tag) throws HiveException
Operator
process
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 String getName()
Node
public static 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 © 2017 The Apache Software Foundation. All rights reserved.