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:

java.io.Serializable, java.lang.Cloneable, Node

public class JoinOperator
extends CommonJoinOperator<JoinDesc>
implements java.io.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.ProgressCounter, Operator.State

Field Summary

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

alias, aliasFilterTags, condn, countAfterReport, dummyObj, dummyObjVectors, filterMaps, filterTags, forwardCache, 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

beginTime, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, counterNames, counterNameToEnum, counters, done, fatalErrorCntr, groupKeyObject, id, inputObjInspectors, inputRows, isLogInfoEnabled, numInputRowsCntr, numOutputRowsCntr, operatorId, out, outputObjInspector, outputRows, parentOperators, reporter, state, statsMap, timeTakenCntr, totalTime

Constructor Summary

Constructors

Constructor and Description
JoinOperator()

Method Summary

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 void	initializeOp(Configuration hconf) Operator specific initialization.
void	jobCloseOp(Configuration hconf, boolean success, JobCloseFeedBack feedBack)
boolean	opAllowedBeforeSortMergeJoin()
void	processOp(java.lang.Object row, int tag) Process the row.
boolean	supportSkewJoinOptimization()

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

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

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

acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, assignCounterNameToEnum, augmentPlan, checkFatalErrors, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, close, columnNamesRowResolvedCanBeObtained, dump, dump, 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, 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, supportAutomaticSortMergeJoin, supportUnionRemoveOptimization, toString, toString, updateCounters

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 void initializeOp(Configuration hconf)
                     throws HiveException

Description copied from class: Operator

Operator specific initialization.

Overrides:

initializeOp in class CommonJoinOperator<JoinDesc>

Throws:

HiveException

processOp

public void processOp(java.lang.Object row,
                      int tag)
               throws HiveException

Description copied from class: Operator

Process the row.

Specified by:

processOp 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(Configuration hconf,
                       boolean success,
                       JobCloseFeedBack feedBack)
                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>