org.apache.hadoop.hive.ql.exec.vector

Class VectorLimitOperator

java.lang.Object

org.apache.hadoop.hive.ql.exec.Operator<LimitDesc>

org.apache.hadoop.hive.ql.exec.LimitOperator

org.apache.hadoop.hive.ql.exec.vector.VectorLimitOperator

All Implemented Interfaces:

Serializable, Cloneable, VectorizationOperator, Node

public class VectorLimitOperator
extends LimitOperator
implements VectorizationOperator

Limit operator implementation Limits the number of rows to be passed on.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Operator

Operator.Counter, Operator.OperatorFunc, Operator.State

Field Summary

Fields inherited from class org.apache.hadoop.hive.ql.exec.LimitOperator

currCount, isMap, leastRow, limit, offset

Fields inherited from class org.apache.hadoop.hive.ql.exec.Operator

abortOp, alias, asyncInitOperations, bucketingVersion, cContext, childOperators, childOperatorsArray, childOperatorsTag, conf, CONTEXT_NAME_KEY, done, groupKeyObject, HIVE_COUNTER_CREATED_DYNAMIC_PARTITIONS, HIVE_COUNTER_CREATED_FILES, HIVE_COUNTER_FATAL, id, indexForTezUnion, inputObjInspectors, LOG, numRows, operatorId, out, outputObjInspector, parentOperators, reporter, runTimeNumRows, state, statsMap

Constructor Summary

Constructors

Constructor and Description
VectorLimitOperator() Kryo ctor.
VectorLimitOperator(CompilationOpContext ctx)
VectorLimitOperator(CompilationOpContext ctx, OperatorDesc conf, VectorizationContext vContext, VectorDesc vectorDesc)

Method Summary

Modifier and Type	Method and Description
VectorizationContext	getInputVectorizationContext()
VectorDesc	getVectorDesc()
void	process(Object row, int tag) Process the row.

Methods inherited from class org.apache.hadoop.hive.ql.exec.LimitOperator

closeOp, getName, getOperatorName, getType, initializeOp

Methods inherited from class org.apache.hadoop.hive.ql.exec.Operator

abort, acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, augmentPlan, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, cloneOp, cloneRecursiveChildren, close, columnNamesRowResolvedCanBeObtained, completeInitializationOp, createDummy, defaultEndGroup, defaultStartGroup, dump, dump, endGroup, flush, flushRecursive, forward, forward, forward, getAdditionalCounters, getBucketingVersion, getChildOperators, getChildren, getColumnExprMap, getCompilationOpContext, getConf, getConfiguration, getCounterName, getDone, getExecContext, getGroupKeyObject, getIdentifier, getIndexForTezUnion, getInputObjInspectors, getIsReduceSink, getMarker, getNextCntr, getNumChild, getNumParent, getOperatorId, getOpTraits, getOutputObjInspector, getParentOperators, getReduceOutputName, getSchema, getStatistics, getStats, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, jobCloseOp, logicalEquals, logicalEqualsTree, logStats, opAllowedAfterMapJoin, opAllowedBeforeMapJoin, opAllowedBeforeSortMergeJoin, opAllowedConvertMapJoin, passExecContext, preorderMap, processGroup, removeChild, removeChildAndAdoptItsChildren, removeParent, removeParents, replaceChild, replaceParent, reset, setAlias, setBucketingVersion, setChildOperators, setColumnExprMap, setCompilationOpContext, setConf, setDone, setExecContext, setGroupKeyObject, setIndexForTezUnion, setInputContext, setInputObjInspectors, setMarker, setNextVectorBatchGroupStatus, setOpTraits, setOutputCollector, setParentOperators, setReporter, setSchema, setStatistics, setUseBucketizedHiveInputFormat, startGroup, supportAutomaticSortMergeJoin, supportSkewJoinOptimization, supportUnionRemoveOptimization, toString, toString

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

VectorLimitOperator

public VectorLimitOperator()

Kryo ctor.

VectorLimitOperator

public VectorLimitOperator(CompilationOpContext ctx)

VectorLimitOperator

public VectorLimitOperator(CompilationOpContext ctx,
                           OperatorDesc conf,
                           VectorizationContext vContext,
                           VectorDesc vectorDesc)

Method Detail

getInputVectorizationContext

public VectorizationContext getInputVectorizationContext()

Specified by:

getInputVectorizationContext in interface VectorizationOperator

process

public void process(Object row,
                    int tag)
             throws HiveException

Description copied from class: Operator

Process the row.

Overrides:

process in class LimitOperator

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

getVectorDesc

public VectorDesc getVectorDesc()

Specified by:

getVectorDesc in interface VectorizationOperator