DROP RESOURCE GROUP

DROP RESOURCE GROUP 语句用于在当前所选数据库中删除资源组。

语法图

DropResourceGroupStmt

IfExists

ResourceGroupName

1. DropResourceGroupStmt ::=
2. "DROP" "RESOURCE" "GROUP" IfExists ResourceGroupName

4. IfExists ::=
5. ('IF' 'EXISTS')?

7. ResourceGroupName ::=
8. Identifier
9. |   "DEFAULT"

注意

• DROP RESOURCE GROUP 语句只能在全局变量 tidb_enable_resource_control 设置为 ON 时才能执行。
• default 资源组为系统保留的资源组，不支持删除。

示例

删除名为 rg1 的资源组：

1. DROP RESOURCE GROUP IF EXISTS rg1;

1. Query OK, 0 rows affected (0.22 sec)

1. CREATE RESOURCE GROUP IF NOT EXISTS rg1 RU_PER_SEC = 500 BURSTABLE;

1. Query OK, 0 rows affected (0.08 sec)

1. SELECT * FROM information_schema.resource_groups WHERE NAME ='rg1';

1. +------+------------+----------+-----------+-------------+
2. | NAME | RU_PER_SEC | PRIORITY | BURSTABLE | QUERY_LIMIT |
3. +------+------------+----------+-----------+-------------+
4. | rg1  | 500        | MEDIUM   | YES       | NULL        |
5. +------+------------+----------+-----------+-------------+
6. 1 row in set (0.01 sec)

1. DROP RESOURCE GROUP IF EXISTS rg1;

1. Query OK, 1 rows affected (0.09 sec)

1. SELECT * FROM information_schema.resource_groups WHERE NAME ='rg1';

1. Empty set (0.00 sec)

MySQL 兼容性

MySQL 也支持 DROP RESOURCE GROUP，但 TiDB 不支持 FORCE 参数。

另请参阅

• ALTER RESOURCE GROUP
• CREATE RESOURCE GROUP
• RU