org.apache.hadoop.hive.ql.io.rcfile.truncate

Class ColumnTruncateTask

java.lang.Object

org.apache.hadoop.hive.ql.exec.Task<ColumnTruncateWork>

org.apache.hadoop.hive.ql.io.rcfile.truncate.ColumnTruncateTask

All Implemented Interfaces:

Serializable, HadoopJobExecHook, Node

public class ColumnTruncateTask
extends Task<ColumnTruncateWork>
implements Serializable, HadoopJobExecHook

See Also:

Serialized Form

Nested Class Summary

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

Task.FeedType, Task.TaskState

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.hadoop.mapred.JobConf	job
protected HadoopJobExecHelper	jobExecHelper

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

BACKUP_COMMON_JOIN, backupChildrenTasks, backupTask, childTasks, clonedConf, COMMON_JOIN, conf, console, CONVERTED_MAPJOIN, CONVERTED_MAPJOIN_LOCAL, CONVERTED_SORTMERGEJOIN, driverContext, feedSubscribers, HINTED_MAPJOIN, HINTED_MAPJOIN_LOCAL, id, jobID, LOG, MAPJOIN_ONLY_NOBACKUP, NO_TAG, parentTasks, queryDisplay, queryPlan, queryState, rootTask, taskCounters, taskHandle, taskTag, work

Constructor Summary

Constructors

Constructor and Description
ColumnTruncateTask()

Method Summary

Modifier and Type	Method and Description
boolean	checkFatalErrors(org.apache.hadoop.mapred.Counters ctrs, StringBuilder errMsg)
int	execute(DriverContext driverContext) This method is overridden in each Task.
String	getName() Gets the name of the node.
org.apache.hadoop.hive.ql.plan.api.StageType	getType() Should be overridden to return the type of the specific task among the types in StageType.
void	initialize(QueryState queryState, QueryPlan queryPlan, DriverContext driverContext, CompilationOpContext opContext)
void	logPlanProgress(SessionState ss)
boolean	requireLock()

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

addDependentTask, canExecuteInParallel, cloneConf, done, equals, executeTask, findLeafs, getAndInitBackupTask, getBackupChildrenTasks, getBackupTask, getChildren, getChildTasks, getCounters, getDependentTasks, getDiagnosticsMessage, getDriverContext, getExternalHandle, getFeedSubscribers, getHive, getId, getInitialized, getJobID, getMapWork, getNumChild, getNumParent, getParentTasks, getQueryPlan, getQueryState, getQueued, getReducer, getStatusMessage, getTaskHandle, getTaskState, getTaskTag, getTopOperators, getTxnMgr, getWork, hashCode, hasReduce, isFetchSource, isLocalMode, isMapRedLocalTask, isMapRedTask, isNotInitialized, isRootTask, isRunnable, pushFeed, receiveFeed, removeDependentTask, removeFromChildrenTasks, setBackupChildrenTasks, setBackupTask, setChildTasks, setConf, setConsole, setDiagnosticMessage, setDone, setDriverContext, setException, setFeedSubscribers, setFetchSource, setId, setInitialized, setLocalMode, setParentTasks, setQueryDisplay, setQueryPlan, setQueued, setRootTask, setStarted, setState, setStatusMessage, setTaskTag, setWork, shutdown, started, subscribeFeed, toString, updateStatusInQueryDisplay, updateTaskMetrics

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

job

protected transient org.apache.hadoop.mapred.JobConf job

jobExecHelper

protected HadoopJobExecHelper jobExecHelper

Constructor Detail

ColumnTruncateTask

public ColumnTruncateTask()

Method Detail

initialize

public void initialize(QueryState queryState,
                       QueryPlan queryPlan,
                       DriverContext driverContext,
                       CompilationOpContext opContext)

Overrides:

initialize in class Task<ColumnTruncateWork>

requireLock

public boolean requireLock()

Overrides:

requireLock in class Task<ColumnTruncateWork>

execute

public int execute(DriverContext driverContext)

Description copied from class: Task

This method is overridden in each Task. TODO execute should return a TaskHandle.

Specified by:

execute in class Task<ColumnTruncateWork>

Returns:

status of executing the task

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

Returns:

String

getType

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

Description copied from class: Task

Should be overridden to return the type of the specific task among the types in StageType.

Specified by:

getType in class Task<ColumnTruncateWork>

Returns:

StageType.* or null if not overridden

checkFatalErrors

public boolean checkFatalErrors(org.apache.hadoop.mapred.Counters ctrs,
                                StringBuilder errMsg)

Specified by:

checkFatalErrors in interface HadoopJobExecHook

logPlanProgress

public void logPlanProgress(SessionState ss)
                     throws IOException

Specified by:

logPlanProgress in interface HadoopJobExecHook

Throws:

IOException