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, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, done, id, inputObjInspectors, LOG, out, outputObjInspector, parentOperators, reporter, state, statsMap |
Method Summary |
protected void |
initializeOp(org.apache.hadoop.conf.Configuration hconf)
Operator specific initialization. |
void |
process(Object row,
int tag)
Process the row. |
Methods inherited from class org.apache.hadoop.hive.ql.exec.Operator |
areAllParentsInitialized, close, closeOp, dump, endGroup, forward, getChildOperators, getChildren, getColumnExprMap, getConf, getDone, getIdentifier, getName, getParentOperators, getSchema, getStats, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initializeChildren, jobClose, logStats, preorderMap, removeChild, replaceChild, replaceParent, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setDone, setId, setOutputCollector, setParentOperators, setReporter, setSchema, startGroup |
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
process
public void process(Object row,
int tag)
throws HiveException
- Description copied from class:
Operator
- Process the row.
- Specified by:
process
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
Copyright © 2009 The Apache Software Foundation