org.apache.hadoop.hive.ql.exec
Class ExtractOperator
java.lang.Object
org.apache.hadoop.hive.ql.exec.Operator<extractDesc>
org.apache.hadoop.hive.ql.exec.ExtractOperator
- All Implemented Interfaces:
- Serializable, Node
public class ExtractOperator
- extends Operator<extractDesc>
- implements Serializable
Extract operator implementation
Extracts a subobject and passes that on.
- See Also:
- Serialized Form
Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator |
alias, beginTime, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, counterNames, counterNameToEnum, counters, done, fatalErrorCntr, id, inputObjInspectors, inputRows, LOG, numInputRowsCntr, numOutputRowsCntr, operatorId, out, outputObjInspector, outputRows, parentOperators, reporter, state, statsMap, timeTakenCntr, totalTime |
Method Summary |
org.apache.hadoop.hive.ql.plan.api.OperatorType |
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.Operator |
areAllParentsInitialized, assignCounterNameToEnum, checkFatalErrors, close, closeOp, dump, dump, endGroup, fatalErrorMessage, forward, getChildOperators, getChildren, getColumnExprMap, getConf, getCounterNames, getCounterNameToEnum, getCounters, getDone, getIdentifier, getName, 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, startGroup, updateCounters |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
eval
protected transient ExprNodeEvaluator eval
ExtractOperator
public ExtractOperator()
initializeOp
protected void initializeOp(org.apache.hadoop.conf.Configuration hconf)
throws HiveException
- Description copied from class:
Operator
- Operator specific initialization.
- Overrides:
initializeOp
in class Operator<extractDesc>
- 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<extractDesc>
- 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 org.apache.hadoop.hive.ql.plan.api.OperatorType 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<extractDesc>
- Returns:
- OperatorType.* or -1 if not overridden
Copyright © 2009 The Apache Software Foundation