Note
This view is available starting with V4.2.0.
Purpose
This view displays the history of Transfer tasks executed in the current tenant.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| TASK_ID | bigint(20) | NO | The ID of the Transfer task. |
| CREATE_TIME | timestamp(6) | YES | The start time of the task. |
| MODIFY_TIME | timestamp(6) | YES | The end time of the task, including the time when the task was canceled. |
| SRC_LS | bigint(20) | NO | The log stream on the source end (the log stream generated by the data source). |
| DEST_LS | bigint(20) | NO | The log stream on the destination end. |
| PART_LIST | longtext | YES | The list of partitions, including user table partitions and global index partitions. |
| PART_COUNT | bigint(20) | YES | The number of partitions in the partition list. |
| NOT_EXIST_PART_LIST | longtext | YES | The list of partitions that were planned to be executed in this task but did not exist when the lock was acquired. |
| LOCK_CONFLICT_PART_LIST | longtext | YES | The list of partitions that were planned to be executed in this task but encountered a lock conflict when the lock was acquired. |
| TABLE_LOCK_TABLET_LIST | longtext | YES | The list of tablets that were successfully locked at the partition level when the task entered the START state. This list contains only the tablets corresponding to the partitions in the PART_LIST. |
| TABLET_LIST | longtext | YES | The complete list of tablets involved in the current Transfer operation. This list includes not only the tablets listed in the PART_LIST but also those associated with local index tables and LOB auxiliary tables. |
| TABLET_COUNT | bigint(20) | YES | The number of tablets in the tablet list. |
| START_SCN | bigint(20) unsigned | YES | The SCN when the Transfer operation was initiated. |
| FINISH_SCN | bigint(20) unsigned | YES | The SCN when the Transfer operation was completed. |
| STATUS | varchar(64) | NO | The status of the task. Valid values:
|
| TRACE_ID | varchar(64) | NO | The trace ID of the task. |
| RESULT | bigint(20) | YES | The result of the task. |
| BALANCE_TASK_ID | bigint(20) | NO | The ID of the associated load balancing task. This Transfer task is a subtask of the corresponding load balancing task. |
| TABLE_LOCK_OWNER_ID | bigint(20) | YES | When a table lock is acquired, the system generates an owner_id for each table lock to identify the owner of the lock. When releasing a table lock, you must provide the corresponding owner_id to allow the system to correctly identify and release the lock. |
| COMMENT | longtext | YES | The comment. This column records the reason for the task being stuck, diagnostic information, and the failure details of the task. |
References
View all tenant-level load balancing tasks (Task):
View all tenant-level log stream load balancing jobs (Job):
View all tenant-level log stream load balancing tasks (Task):
View all tenant-level Transfer partition tasks (Task):
For more information about data load balancing, see Data load balancing.