public class LimitOperator extends Operator<LimitDesc> implements java.io.Serializable
Operator.OperatorFunc, Operator.ProgressCounter, Operator.State
Modifier and Type | Field and Description |
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protected int |
currCount |
protected boolean |
isMap |
protected int |
leastRow |
protected int |
limit |
alias, beginTime, childOperators, childOperatorsArray, childOperatorsTag, colExprMap, conf, counterNames, counterNameToEnum, counters, done, fatalErrorCntr, groupKeyObject, id, inputObjInspectors, inputRows, isLogInfoEnabled, LOG, numInputRowsCntr, numOutputRowsCntr, operatorId, out, outputObjInspector, outputRows, parentOperators, reporter, state, statsMap, timeTakenCntr, totalTime
Constructor and Description |
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LimitOperator() |
Modifier and Type | Method and Description |
---|---|
void |
closeOp(boolean abort)
Operator specific close routine.
|
java.lang.String |
getName()
Implements the getName function for the Node Interface.
|
static java.lang.String |
getOperatorName() |
OperatorType |
getType()
Return the type of the specific operator among the
types in OperatorType.
|
protected void |
initializeOp(Configuration hconf)
Operator specific initialization.
|
void |
processOp(java.lang.Object row,
int tag)
Process the row.
|
acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, assignCounterNameToEnum, augmentPlan, checkFatalErrors, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, close, columnNamesRowResolvedCanBeObtained, dump, dump, endGroup, fatalErrorMessage, flush, forward, getAdditionalCounters, getChildOperators, getChildren, getColumnExprMap, getConf, getConfiguration, getCounterNames, getCounterNameToEnum, getCounters, getDone, getExecContext, getGroupKeyObject, getIdentifier, getInputObjInspectors, getNextCntr, getNumChild, getNumParent, getOperatorId, getParentOperators, getSchema, getStats, getWrappedCounterName, incrCounter, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeCounters, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, jobCloseOp, logStats, opAllowedAfterMapJoin, opAllowedBeforeMapJoin, opAllowedBeforeSortMergeJoin, opAllowedConvertMapJoin, passExecContext, preorderMap, process, processGroup, removeChild, removeChildAndAdoptItsChildren, removeChildren, removeParent, replaceChild, replaceParent, reset, resetId, resetLastEnumUsed, resetStats, setAlias, setChildOperators, setColumnExprMap, setConf, setCounterNames, setCounterNameToEnum, setDone, setExecContext, setGroupKeyObject, setId, setInputObjInspectors, setOperatorId, setOutputCollector, setParentOperators, setReporter, setSchema, setUseBucketizedHiveInputFormat, startGroup, supportAutomaticSortMergeJoin, supportSkewJoinOptimization, supportUnionRemoveOptimization, toString, toString, updateCounters
protected transient int limit
protected transient int leastRow
protected transient int currCount
protected transient boolean isMap
protected void initializeOp(Configuration hconf) throws HiveException
Operator
initializeOp
in class Operator<LimitDesc>
HiveException
public void processOp(java.lang.Object row, int tag) throws HiveException
Operator
processOp
in class Operator<LimitDesc>
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 java.lang.String getName()
Operator
public static java.lang.String getOperatorName()
public OperatorType getType()
Operator
public void closeOp(boolean abort) throws HiveException
Operator
closeOp
in class Operator<LimitDesc>
HiveException
Copyright © 2012 The Apache Software Foundation