org.apache.hadoop.hive.ql.exec.schq

Class ScheduledQueryMaintenanceTask

java.lang.Object

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

org.apache.hadoop.hive.ql.exec.schq.ScheduledQueryMaintenanceTask

All Implemented Interfaces:

Serializable, Node

public class ScheduledQueryMaintenanceTask
extends Task<ScheduledQueryMaintenanceWork>

Scheduled query maintenance task. CREATES/ALTERS or DROPs a scheduled query.

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

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

Constructor Summary

Constructors

Constructor and Description
ScheduledQueryMaintenanceTask()

Method Summary

Modifier and Type	Method and Description
int	execute() This method is overridden in each Task.
String	getName()
StageType	getType() Should be overridden to return the type of the specific task among the types in StageType.

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ScheduledQueryMaintenanceTask

public ScheduledQueryMaintenanceTask()

Method Detail

getName

public String getName()

execute

public int execute()

Description copied from class: Task

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

Specified by:

execute in class Task<ScheduledQueryMaintenanceWork>

Returns:

status of executing the task

getType

public 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<ScheduledQueryMaintenanceWork>

Returns:

StageType.* or null if not overridden