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java.lang.Objectorg.apache.hadoop.hive.ql.exec.Operator<T>
org.apache.hadoop.hive.ql.exec.CommonJoinOperator<mapJoinDesc>
org.apache.hadoop.hive.ql.exec.MapJoinOperator
public class MapJoinOperator
Map side Join operator implementation.
Nested Class Summary | |
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static class |
MapJoinOperator.MapJoinObjectCtx
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Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator |
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CommonJoinOperator.IntermediateObject |
Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Operator |
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Operator.OperatorFunc, Operator.ProgressCounter, Operator.State |
Field Summary | |
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protected Map<Byte,List<ExprNodeEvaluator>> |
joinKeys
The expressions for join inputs's join keys. |
protected Map<Byte,List<ObjectInspector>> |
joinKeysObjectInspectors
The ObjectInspectors for the join inputs's join keys. |
protected Map<Byte,List<ObjectInspector>> |
joinKeysStandardObjectInspectors
The standard ObjectInspectors for the join inputs's join keys. |
protected Map<Byte,HashMapWrapper<MapJoinObjectKey,MapJoinObjectValue>> |
mapJoinTables
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Fields inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator |
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alias, condn, dummyObjVectors, joinValues, joinValuesObjectInspectors, joinValuesStandardObjectInspectors, noOuterJoin, numAliases, order, spillTableDesc, totalSz |
Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator |
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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 | |
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MapJoinOperator()
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Method Summary | |
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void |
closeOp(boolean abort)
All done |
protected void |
fatalErrorMessage(StringBuffer errMsg,
long counterCode)
Get the fatal error message based on counter's code. |
static Map<Integer,MapJoinOperator.MapJoinObjectCtx> |
getMapMetadata()
|
String |
getName()
Implements the getName function for the Node Interface. |
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 |
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checkAndGenObject, computeValues, endGroup, getJoinOutputObjectInspector, getNextSize, getObjectInspectorsFromEvaluators, getPosToAliasMap, getSpillTableDesc, getStandardObjectInspectors, populateJoinKeyValue, setPosToAliasMap, startGroup |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected transient Map<Byte,List<ExprNodeEvaluator>> joinKeys
protected transient Map<Byte,List<ObjectInspector>> joinKeysObjectInspectors
protected transient Map<Byte,List<ObjectInspector>> joinKeysStandardObjectInspectors
protected transient Map<Byte,HashMapWrapper<MapJoinObjectKey,MapJoinObjectValue>> mapJoinTables
Constructor Detail |
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public MapJoinOperator()
Method Detail |
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public static Map<Integer,MapJoinOperator.MapJoinObjectCtx> getMapMetadata()
protected void initializeOp(org.apache.hadoop.conf.Configuration hconf) throws HiveException
Operator
initializeOp
in class CommonJoinOperator<mapJoinDesc>
HiveException
protected void fatalErrorMessage(StringBuffer errMsg, long counterCode)
Operator
fatalErrorMessage
in class Operator<mapJoinDesc>
errMsg
- error message should be appended to this output parameter.counterCode
- input counter code.public void processOp(Object row, int tag) throws HiveException
Operator
processOp
in class Operator<mapJoinDesc>
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 void closeOp(boolean abort) throws HiveException
CommonJoinOperator
closeOp
in class CommonJoinOperator<mapJoinDesc>
HiveException
public String getName()
getName
in interface Node
getName
in class CommonJoinOperator<mapJoinDesc>
public int getType()
Operator
getType
in class Operator<mapJoinDesc>
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