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

DropResourceGroupStmt ::=
    "DROP" "RESOURCE" "GROUP" IfExists ResourceGroupName
IfExists ::=
    ('IF' 'EXISTS')?
ResourceGroupName ::=
    Identifier

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：

DROP RESOURCE GROUP IF EXISTS rg1;

Query OK, 0 rows affected (0.22 sec)

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

Query OK, 0 rows affected (0.08 sec)

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

+------+------------+----------+-----------+
| NAME | RU_PER_SEC | PRIORITY | BURSTABLE |
+------+------------+----------+-----------+
| rg1  |       500  | MEDIUM   | YES       |
+------+------------+----------+-----------+
1 row in set (0.01 sec)

DROP RESOURCE GROUP IF EXISTS rg1;

Query OK, 1 rows affected (0.09 sec)

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

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