Note
This view is available starting with V4.2.0.
Purpose
This view displays the plan information collected by executing EXPLAIN PLAN on all tenants on the current OBServer node.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| TENANT_ID | bigint(20) | NO | The ID of the tenant to which the plan information belongs.
NoteThis column is available starting with V4.3.5 BP1. |
| SQL_ID | varchar(32) | NO | The query ID. |
| DB_ID | bigint(20) | NO | The ID of the schema to which the query belongs. |
| PLAN_HASH | bigint(20) unsigned | NO | The hash value of the plan. |
| PLAN_ID | bigint(20) | The ID of the plan. | |
| GMT_CREATE | timestamp(6) | NO | The time when the record was generated. |
| OPERATOR | varchar(255) | NO | The name of the operator (for example: TABLE SCAN, SORT). |
| OBJECT_NODE | varchar(40) | NO | The name of the dblink if the current operator is related to a dblink. |
| OBJECT_ID | bigint(20) | NO | The ID of the scanned object (for example: the ID of the physical table scanned by the TABLE SCAN operator). |
| OBJECT_OWNER | varchar(128) | NO | The user who owns the scanned object. |
| OBJECT_NAME | varchar(128) | NO | The name of the scanned object (for example: the name of the physical table scanned by the TABLE SCAN operator). |
| OBJECT_ALIAS | varchar(261) | NO | The alias of the scanned object (for example: the alias of the physical table scanned by the TABLE SCAN operator). |
| OBJECT_TYPE | varchar(20) | NO | The type of the scanned object (for example: SYNONYM, DBLINK, BASIC TABLE). |
| OPTIMIZER | varchar(4000) | NO | The index-related information (for example: the number of physical rows, logical rows, and table accesses, the type of statistics, and the version number of the statistics). |
| ID | bigint(20) | NO | The ID of the logical operator. |
| PARENT_ID | bigint(20) | NO | The ID of the parent operator of the logical operator. |
| DEPTH | bigint(20) | NO | The depth of the logical operator in the current plan, that is, the level in the binary plan tree. |
| POSITION | bigint(20) | NO | The position of the current logical operator as a child node of the parent operator. |
| COST | bigint(20) | NO | The estimated cost calculated by the optimizer. |
| REAL_COST | bigint(20) | NO | The actual cost when the plan is executed for the first time (execution feedback information). |
| CARDINALITY | bigint(20) | NO | The estimated number of rows output by the current operator calculated by the optimizer. |
| REAL_CARDINALITY | bigint(20) | NO | The actual number of rows output by the current operator when the plan is executed for the first time (execution feedback information). |
| IO_COST | bigint(20) | NO | The actual I/O overhead of the current operator when the plan is executed for the first time (execution feedback information). |
| CPU_COST | bigint(20) | NO | The actual CPU overhead of the current operator when the plan is executed for the first time (execution feedback information). |
| BYTES | bigint(20) | NO | The width of the data output by the current operator calculated by the optimizer. |
| ROWSET | bigint(20) | NO | The vectorized size of the current operator. |
| OTHER_TAG | varchar(4000) | NO | The hint used in the current query. This column stores only the information of the first row in the plan. |
| PARTITION_START | varchar(4000) | NO | The partition information scanned by the TABLE SCAN operator. |
| OTHER | varchar(4000) | NO | The optimization information, for example: the plan type, parameterized information of the Fast Parser, Plan Note, and constraint information hit by the plan. |
| ACCESS_PREDICATES | varchar(4000) | NO | The expression information that needs to be accessed by the current operator. |
| FILTER_PREDICATES | varchar(4000) | NO | The filter conditions of the current operator. |
| STARTUP_PREDICATES | varchar(4000) | NO | The startup conditions of the current operator. |
| PROJECTION | varchar(4000) | NO | The expression information output by the current operator. |
| SPECIAL_PREDICATES | varchar(4000) | NO | The unique expression information of the current operator, for example: Join Condition, GROUP EXPRS, and SORT EXPRS. |
| QBLOCK_NAME | varchar(128) | NO | The name of the query block to which the current operator belongs. |
| REMARKS | varchar(4000) | NO | The modification tracking information of qb_name. |
| OTHER_XML | varchar(4000) | NO | OUTLINE DATA |
Sample query
In the sys tenant, query the plan information collected by executing EXPLAIN PLAN on all tenants on the current OBServer node, and display one record.
obclient [oceanbase]> SELECT * FROM oceanbase.V$OB_SQL_PLAN LIMIT 1\G
The query result is as follows:
*************************** 1. row ***************************
TENANT_ID: 1
SQL_ID: 359E40D6A4AB75171925325700759325
DB_ID: 500006
PLAN_HASH: 6388442502389984409
PLAN_ID: 28790
GMT_CREATE: 2025-03-26 10:26:41.039836
OPERATOR: EXPRESSION
OBJECT_NODE:
OBJECT_ID: 0
OBJECT_OWNER:
OBJECT_NAME:
OBJECT_ALIAS:
OBJECT_TYPE:
OPTIMIZER:
ID: 0
PARENT_ID: -1
DEPTH: 0
POSITION: 1
COST: 1
REAL_COST: 0
CARDINALITY: 1
REAL_CARDINALITY: 1
IO_COST: 0
CPU_COST: 0
BYTES: 0
ROWSET: 1
OTHER_TAG: /*+
*/
PARTITION_START:
OTHER: Plan Type:
LOCAL
Note:
Degree of Parallelisim is 1 because of table property
ACCESS_PREDICATES:
FILTER_PREDICATES:
STARTUP_PREDICATES:
PROJECTION: output([database()])
SPECIAL_PREDICATES: values({database()})
QBLOCK_NAME: SEL$1
REMARKS: stmt_id:0, SEL$1
OTHER_XML: /*+
BEGIN_OUTLINE_DATA
OPTIMIZER_FEATURES_ENABLE('4.3.5.1')
END_OUTLINE_DATA
*/
1 row in set