Purpose
The V$SQL_WORKAREA view displays the workarea statistics of all operators previously subject to automatic SQL memory management.
Note
This view is introduced since OceanBase Database V2.2.77.
Columns
Column |
Type |
Nullable? |
Description |
|---|---|---|---|
| ADDRESS | RAW(8) | NO | The address of the handle corresponding to the SQL statement, which is not specified at present. At present, this column is not supported and is NULL by default. |
| HASH_VALUE | NUMBER | NO | The hash value of the statement. At present, this column is not supported and is NULL by default. |
| SQL_ID | VARCHAR2(32) | NO | The unique identifier of the SQL statement. |
| CHILD_NUMBER | NUMBER | NO | The number of the cursor. At present, this column is not supported and is NULL by default. |
| WORKAREA_ADDRESS | RAW(8) | NO | The address of the workarea. At present, this column is not supported and is NULL by default. |
| OPERATION_TYPE | VARCHAR2(40) | NO | The type of the operator using the workarea, such as Sort, Hash Join, or Group by. |
| OPERATION_ID | NUMBER(38) | NO | The unique identifier of the operator in the plan tree. |
| POLICY | VARCHAR2(10) | NO | The policy for the workarea. Valid values: |
| ESTIMATED_OPTIMAL_SIZE | NUMBER(38) | NO | The estimated memory size in bytes required for executing the operator in the workarea in optimal mode. |
| ESTIMATED_ONEPASS_SIZE | NUMBER(38) | NO | The estimated memory size in bytes required for executing the operator in one pass mode. |
| LAST_MEMORY_USED | NUMBER(38) | NO | The size in bytes of the memory used by the cursor in the last execution. |
| LAST_EXECUTION | VARCHAR2(10) | NO | Indicates whether the workarea selects the optimal, one pass, or multipasses mode in the last execution of the cursor. |
| LAST_DEGREE | NUMBER(38) | NO | The degree of parallelism in the last execution. |
| TOTAL_EXECUTIONS | NUMBER(38) | NO | The total number of executions in the workarea. |
| OPTIMAL_EXECUTIONS | NUMBER(38) | NO | The number of executions in optimal mode. |
| ONEPASS_EXECUTIONS | NUMBER(38) | NO | The number of executions in one pass mode. |
| MULTIPASSES_EXECUTIONS | NUMBER(38) | NO | The number of executions in multipasses mode. |
| ACTIVE_TIME | NUMBER(38) | NO | The average active duration of the workarea in seconds. |
| MAX_TEMPSEG_SIZE | NUMBER(38) | NO | The maximum size in bytes of the temporary disk space used by the workarea. The value of this column is NULL if no temporary space is used. |
| LAST_TEMPSEG_SIZE | NUMBER(38) | NO | The size of the temporary disk space used by the workarea in the last execution. The value of this column is NULL if no temporary space is used. |
| CON_ID | NUMBER(38) | NO | The ID of the tenant. |