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

java.lang.Object
  extended by org.apache.hadoop.hive.ql.exec.Operator<T>
      extended by org.apache.hadoop.hive.ql.exec.CommonJoinOperator<joinDesc>
          extended by org.apache.hadoop.hive.ql.exec.JoinOperator
All Implemented Interfaces:
Serializable, Node

public class JoinOperator
extends CommonJoinOperator<joinDesc>
implements Serializable

Join operator implementation.

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator
CommonJoinOperator.IntermediateObject
 
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, condn, dummyObjVectors, joinValues, joinValuesObjectInspectors, joinValuesStandardObjectInspectors, LOG, noOuterJoin, numAliases, order, spillTableDesc, totalSz
 
Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator
beginTime, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, counterNames, counterNameToEnum, counters, done, fatalErrorCntr, id, inputObjInspectors, inputRows, numInputRowsCntr, numOutputRowsCntr, operatorId, out, outputObjInspector, outputRows, parentOperators, reporter, state, statsMap, timeTakenCntr, totalTime
 
Constructor Summary
JoinOperator()
           
 
Method Summary
 int getType()
          Should be overridden to return the type of the specific operator among the types in OperatorType
protected  void initializeOp(org.apache.hadoop.conf.Configuration hconf)
          Operator specific initialization.
 void processOp(Object row, int tag)
          Process the row.
 
Methods inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator
checkAndGenObject, closeOp, computeValues, endGroup, getJoinOutputObjectInspector, getName, getNextSize, getObjectInspectorsFromEvaluators, getPosToAliasMap, getSpillTableDesc, getStandardObjectInspectors, populateJoinKeyValue, setPosToAliasMap, startGroup
 
Methods inherited from class org.apache.hadoop.hive.ql.exec.Operator
areAllParentsInitialized, assignCounterNameToEnum, checkFatalErrors, close, dump, dump, fatalErrorMessage, forward, getChildOperators, getChildren, getColumnExprMap, getConf, getCounterNames, getCounterNameToEnum, getCounters, getDone, getIdentifier, getOperatorId, getParentOperators, getSchema, getStats, incrCounter, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initializeChildren, initializeCounters, initOperatorId, jobClose, logStats, preorderMap, process, removeChild, replaceChild, replaceParent, resetId, resetLastEnumUsed, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setCounterNames, setCounterNameToEnum, setDone, setId, setOperatorId, setOutputCollector, setParentOperators, setReporter, setSchema, updateCounters
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

JoinOperator

public JoinOperator()
Method Detail

initializeOp

protected void 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

processOp

public void processOp(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 int getType()
Description copied from class: Operator
Should be overridden to return the type of the specific operator among the types in OperatorType

Overrides:
getType in class Operator<joinDesc>
Returns:
OperatorType.* or -1 if not overridden


Copyright © 2009 The Apache Software Foundation