5.219 DBA_OPTSTAT_OPERATION_TASKS

DBA_OPTSTAT_OPERATION_TASKS displays the history of tasks that are performed as part of statistics operations (recorded in DBA_OPTSTAT_OPERATIONS). Each task represents a target object to be processed in the corresponding parent operation.

Column Datatype NULL Description

OPID

NUMBER

Internal identifier for the statistics operation that the task belongs to

TARGET

VARCHAR2(100)

Name of the object that this task operates on

TARGET_OBJN

NUMBER

Object number of the target object

TARGET_TYPE

VARCHAR2(40)

Type of the target object. Possible values are:

  • TABLE

  • TABLE (GLOBAL STATS ONLY):

    Task is created to gather only global statistics of a partitioned table

  • TABLE (COORDINATOR JOB):

    Coordinator task for a partitioned table when concurrency is on

  • TABLE PARTITION

  • TABLE SUBPARTITION

  • INDEX

  • INDEX PARTITION

  • INDEX SUBPARTITION

TARGET_SIZE

NUMBER

Target size (in number of blocks) when the task started

START_TIME

TIMESTAMP(6) WITH TIME ZONE

Task start time

END_TIME

TIMESTAMP(6) WITH TIME ZONE

Task end time

STATUS

VARCHAR2(49)

Current task status. Possible values are:

  • PENDING: Task is queued for processing

  • IN PROGRESS: Task is currently running

  • COMPLETED: Task has completed successfully

  • FAILED: Task has failed

  • SKIPPED: Task has been skipped, as it does not exist any more, or its stats are not stale (applies only to only automatic statistics gathering)

  • TIMED OUT: Maintenance window was not enough to complete this task (applies only to automatic statistics gathering)

JOB_NAME

VARCHAR2(50)

Name of the scheduler job that executes this task (for example, when concurrency is on)

ESTIMATED_COST

NUMBER

Estimated cost of the task (measured as elapsed time in seconds). This column is populated only when concurrency is on.

BATCHING_COEFF

NUMBER

For internal use only

ACTIONS

NUMBER

For internal use only

PRIORITY

NUMBER

Rank of the task among all target objects for the parent operation

FLAGS

NUMBER

For internal use only

NOTES

VARCHAR2(4000)

Notes about the underlying task, such as the failure message for tasks with status FAILED.

See Also:

"DBA_OPTSTAT_OPERATIONS"