org.apache.hadoop.hive.ql.exec

Class JoinOperator

java.lang.Object

org.apache.hadoop.hive.ql.exec.Operator<T>

org.apache.hadoop.hive.ql.exec.CommonJoinOperator<JoinDesc>

org.apache.hadoop.hive.ql.exec.JoinOperator

All Implemented Interfaces:

Serializable, Cloneable, Node

public class JoinOperator
extends CommonJoinOperator<JoinDesc>
implements Serializable

Join operator implementation.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JoinOperator.SkewkeyTableCounter SkewkeyTableCounter.

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Operator

Operator.OperatorFunc, Operator.State

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator

alias, aliasFilterTags, condn, countAfterReport, dummyObj, dummyObjVectors, filterMaps, filterTags, forwardCache, hconf, heartbeatInterval, intermediate, joinFilterObjectInspectors, joinFilters, joinValues, joinValuesObjectInspectors, joinValuesStandardObjectInspectors, LOG, noOuterJoin, NOTSKIPBIGTABLE, nullsafes, numAliases, offsets, order, rowContainerStandardObjectInspectors, skipVectors, spillTableDesc, totalSz

Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator

childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, CONTEXT_NAME_KEY, done, groupKeyObject, HIVECOUNTERCREATEDFILES, HIVECOUNTERFATAL, id, inputObjInspectors, isLogDebugEnabled, isLogInfoEnabled, isLogTraceEnabled, operatorId, out, outputObjInspector, parentOperators, PLOG, reporter, state, statsMap

Constructor Summary

Constructors

Constructor and Description
JoinOperator()

Method Summary

Methods

Modifier and Type	Method and Description
void	closeOp(boolean abort) All done.
void	endGroup() Forward a record of join results.
OperatorType	getType() Return the type of the specific operator among the types in OperatorType.
protected Collection<Future<?>>	initializeOp(org.apache.hadoop.conf.Configuration hconf) Operator specific initialization.
void	jobCloseOp(org.apache.hadoop.conf.Configuration hconf, boolean success)
boolean	opAllowedBeforeSortMergeJoin()
void	process(Object row, int tag) Process the row.
boolean	supportSkewJoinOptimization()

Methods inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator

checkAndGenObject, getFilteredValue, getFilterTag, getName, getNextSize, getOperatorName, getPosToAliasMap, getValueObjectInspectors, hasFilter, internalForward, opAllowedAfterMapJoin, opAllowedBeforeMapJoin, reportProgress, setPosToAliasMap, startGroup

Methods inherited from class org.apache.hadoop.hive.ql.exec.Operator

acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, augmentPlan, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, cloneOp, cloneRecursiveChildren, close, columnNamesRowResolvedCanBeObtained, completeInitializationOp, createDummy, defaultEndGroup, defaultStartGroup, dump, dump, flush, forward, getAdditionalCounters, getChildOperators, getChildren, getColumnExprMap, getConf, getConfiguration, getDone, getExecContext, getGroupKeyObject, getIdentifier, getInputObjInspectors, getNextCntr, getNumChild, getNumParent, getOperatorId, getOpTraits, getOutputObjInspector, getParentOperators, getSchema, getStatistics, getStats, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, logStats, opAllowedConvertMapJoin, passExecContext, preorderMap, processGroup, removeChild, removeChildAndAdoptItsChildren, removeChildren, removeParent, replaceChild, replaceParent, reset, resetId, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setDone, setExecContext, setGroupKeyObject, setId, setInputContext, setInputObjInspectors, setOperatorId, setOpTraits, setOutputCollector, setParentOperators, setReporter, setSchema, setStatistics, setUseBucketizedHiveInputFormat, supportAutomaticSortMergeJoin, supportUnionRemoveOptimization, toString, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

JoinOperator

public JoinOperator()

Method Detail

initializeOp

protected Collection<Future<?>> initializeOp(org.apache.hadoop.conf.Configuration hconf)
                                      throws HiveException

Description copied from class: Operator

Operator specific initialization.

Overrides:

initializeOp in class CommonJoinOperator<JoinDesc>

Throws:

HiveException

process

public void process(Object row,
           int tag)
             throws HiveException

Description copied from class: Operator

Process the row.

Specified by:

process in class Operator<JoinDesc>

Parameters:

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.

Throws:

HiveException

getType

public OperatorType getType()

Description copied from class: Operator

Return the type of the specific operator among the types in OperatorType.

Specified by:

getType in class Operator<JoinDesc>

Returns:

OperatorType.*

closeOp

public void closeOp(boolean abort)
             throws HiveException

All done.

Overrides:

closeOp in class CommonJoinOperator<JoinDesc>

Throws:

HiveException

jobCloseOp

public void jobCloseOp(org.apache.hadoop.conf.Configuration hconf,
              boolean success)
                throws HiveException

Overrides:

jobCloseOp in class Operator<JoinDesc>

Throws:

HiveException

endGroup

public void endGroup()
              throws HiveException

Forward a record of join results.

Overrides:

endGroup in class CommonJoinOperator<JoinDesc>

Throws:

HiveException

supportSkewJoinOptimization

public boolean supportSkewJoinOptimization()

Overrides:

supportSkewJoinOptimization in class Operator<JoinDesc>

opAllowedBeforeSortMergeJoin

public boolean opAllowedBeforeSortMergeJoin()

Overrides:

opAllowedBeforeSortMergeJoin in class Operator<JoinDesc>