org.apache.hadoop.hive.ql.exec
Class MapJoinOperator
java.lang.Object
org.apache.hadoop.hive.ql.exec.Operator<T>
org.apache.hadoop.hive.ql.exec.CommonJoinOperator<mapJoinDesc>
org.apache.hadoop.hive.ql.exec.MapJoinOperator
- All Implemented Interfaces:
- Serializable, Node
public class MapJoinOperator
- extends CommonJoinOperator<mapJoinDesc>
- implements Serializable
Map side Join operator implementation.
- See Also:
- Serialized Form
Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator |
childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, done, id, inputObjInspectors, out, outputObjInspector, parentOperators, reporter, state, statsMap |
Methods inherited from class org.apache.hadoop.hive.ql.exec.CommonJoinOperator |
checkAndGenObject, computeValues, endGroup, getJoinOutputObjectInspector, getNextSize, getObjectInspectorsFromEvaluators, getPosToAliasMap, getStandardObjectInspectors, populateJoinKeyValue, setPosToAliasMap, startGroup |
Methods inherited from class org.apache.hadoop.hive.ql.exec.Operator |
areAllParentsInitialized, close, dump, forward, getChildOperators, getChildren, getColumnExprMap, getConf, getDone, getIdentifier, getParentOperators, getSchema, getStats, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initializeChildren, jobClose, logStats, preorderMap, removeChild, replaceChild, replaceParent, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setDone, setId, setOutputCollector, setParentOperators, setReporter, setSchema |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
joinKeys
protected transient Map<Byte,List<ExprNodeEvaluator>> joinKeys
- The expressions for join inputs's join keys.
joinKeysObjectInspectors
protected transient Map<Byte,List<ObjectInspector>> joinKeysObjectInspectors
- The ObjectInspectors for the join inputs's join keys.
joinKeysStandardObjectInspectors
protected transient Map<Byte,List<ObjectInspector>> joinKeysStandardObjectInspectors
- The standard ObjectInspectors for the join inputs's join keys.
mapJoinTables
protected transient Map<Byte,HTree> mapJoinTables
MapJoinOperator
public MapJoinOperator()
getMapMetadata
public static Map<Integer,MapJoinOperator.MapJoinObjectCtx> getMapMetadata()
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<mapJoinDesc>
- 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<mapJoinDesc>
- 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
getName
public String getName()
- Implements the getName function for the Node Interface.
- Specified by:
getName
in interface Node
- Overrides:
getName
in class CommonJoinOperator<mapJoinDesc>
- Returns:
- the name of the operator
closeOp
public void closeOp(boolean abort)
throws HiveException
- Description copied from class:
CommonJoinOperator
- All done
- Overrides:
closeOp
in class CommonJoinOperator<mapJoinDesc>
- Throws:
HiveException
Copyright © 2009 The Apache Software Foundation