org.apache.hadoop.hive.ql.exec

Class MapOperator

java.lang.Object

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

org.apache.hadoop.hive.ql.exec.AbstractMapOperator

org.apache.hadoop.hive.ql.exec.MapOperator

All Implemented Interfaces:

Serializable, Cloneable, Node

public class MapOperator
extends AbstractMapOperator

Map operator. This triggers overall map side processing. This is a little different from regular operators in that it starts off by processing a Writable data structure from a Table (instead of a Hive Object).

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	MapOperator.MapOpCtx

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

AbstractMapOperator.Counter

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

Operator.OperatorFunc, Operator.State

Field Summary

Fields

Modifier and Type	Field and Description
protected long	cntr
protected MapOperator.MapOpCtx[]	currentCtxs
protected long	logEveryNRows

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

deserialize_error_count, numRows, recordCounter

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, operatorId, out, outputObjInspector, parentOperators, reporter, runTimeNumRows, state, statsMap

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	MapOperator() Kryo ctor.
	MapOperator(CompilationOpContext ctx)

Method Summary

Modifier and Type	Method and Description
void	cleanUpInputFileChangedOp()
Deserializer	getCurrentDeserializer()
String	getName() Gets the name of the node.
static String	getOperatorName()
org.apache.hadoop.hive.ql.plan.api.OperatorType	getType() Return the type of the specific operator among the types in OperatorType.
void	initEmptyInputChildren(List<Operator<?>> children, org.apache.hadoop.conf.Configuration hconf)
void	initializeContexts()
void	initializeMapOperator(org.apache.hadoop.conf.Configuration hconf)
void	initializeOp(org.apache.hadoop.conf.Configuration hconf) Operator specific initialization.
static Object[]	populateVirtualColumnValues(ExecMapperContext ctx, List<VirtualColumn> vcs, Object[] vcValues, Deserializer deserializer)
void	process(Object row, int tag) Process the row.
void	process(org.apache.hadoop.io.Writable value)
protected void	rowsForwarded(int childrenDone, int rows)
void	setChildren(org.apache.hadoop.conf.Configuration hconf)

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

clearConnectedOperators, closeOp, getConnectedOperators, getNominalPath, setConnectedOperators

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

abort, acceptLimitPushdown, allInitializedParentsAreClosed, areAllParentsInitialized, augmentPlan, cleanUpInputFileChanged, 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

Field Detail

cntr

protected transient long cntr

logEveryNRows

protected transient long logEveryNRows

currentCtxs

protected transient MapOperator.MapOpCtx[] currentCtxs

Constructor Detail

MapOperator

protected MapOperator()

Kryo ctor.

MapOperator

public MapOperator(CompilationOpContext ctx)

Method Detail

initEmptyInputChildren

public void initEmptyInputChildren(List<Operator<?>> children,
                                   org.apache.hadoop.conf.Configuration hconf)
                            throws SerDeException,
                                   Exception

Specified by:

initEmptyInputChildren in class AbstractMapOperator

Throws:

SerDeException

Exception

setChildren

public void setChildren(org.apache.hadoop.conf.Configuration hconf)
                 throws Exception

Specified by:

setChildren in class AbstractMapOperator

Throws:

Exception

initializeOp

public void initializeOp(org.apache.hadoop.conf.Configuration hconf)
                  throws HiveException

Description copied from class: Operator

Operator specific initialization.

Overrides:

initializeOp in class Operator<MapWork>

Throws:

HiveException

initializeMapOperator

public void initializeMapOperator(org.apache.hadoop.conf.Configuration hconf)
                           throws HiveException

Overrides:

initializeMapOperator in class AbstractMapOperator

Throws:

HiveException

cleanUpInputFileChangedOp

public void cleanUpInputFileChangedOp()
                               throws HiveException

Overrides:

cleanUpInputFileChangedOp in class Operator<MapWork>

Throws:

HiveException

process

public void process(org.apache.hadoop.io.Writable value)
             throws HiveException

Specified by:

process in class AbstractMapOperator

Throws:

HiveException

rowsForwarded

protected final void rowsForwarded(int childrenDone,
                                   int rows)

populateVirtualColumnValues

public static Object[] populateVirtualColumnValues(ExecMapperContext ctx,
                                                   List<VirtualColumn> vcs,
                                                   Object[] vcValues,
                                                   Deserializer deserializer)

process

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

Description copied from class: Operator

Process the row.

Specified by:

process in class Operator<MapWork>

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()

Description copied from interface: Node

Gets the name of the node. This is used in the rule dispatchers.

Specified by:

getName in interface Node

Specified by:

getName in class Operator<MapWork>

Returns:

String

getOperatorName

public static String getOperatorName()

getType

public org.apache.hadoop.hive.ql.plan.api.OperatorType getType()

Description copied from class: Operator

Return the type of the specific operator among the types in OperatorType.

Specified by:

getType in class Operator<MapWork>

Returns:

OperatorType.*

initializeContexts

public void initializeContexts()

Specified by:

initializeContexts in class AbstractMapOperator

getCurrentDeserializer

public Deserializer getCurrentDeserializer()

Specified by:

getCurrentDeserializer in class AbstractMapOperator