SET PROPERTY

Description

Set user attributes, including resources assigned to users, importing clusters, etc.

SET PROPERTY [FOR 'user'] 'key' = 'value' [, 'key' = 'value']

The user attribute set here is for user, not user_identity. That is, if two users 'jack'@'%' and 'jack'@'192.%' are created through the CREATE USER statement, the SET PROPERTY statement can only be used for the user jack, not 'jack'@'% ' or 'jack'@'192.%'

key:

Super user privileges:

max_user_connections: The maximum number of connections.

max_query_instances: The number of instances that a user can use to execute a query at the same time.

sql_block_rules: Set sql block rules. Once set, queries sent by this user will be rejected if they match the rules.

cpu_resource_limit: Limit the cpu resources for queries. See the introduction to the session variable cpu_resource_limit for details. -1 means not set.

exec_mem_limit: Limit the memory usage of the query. See the introduction to the session variable exec_mem_limit for details. -1 means not set.

resource_tags: Specifies the user's resource tag permissions.

query_timeout: Specifies the user's query timeout permissions.

Note: If the attributes `cpu_resource_limit`, `exec_mem_limit` are not set, the value in the session variable will be used by default.

Example

1. Modify the maximum number of user jack connections to 1000

   SET PROPERTY FOR 'jack' 'max_user_connections' = '1000';

2. Modify the number of available instances for user jack's query to 3000

   SET PROPERTY FOR 'jack' 'max_query_instances' = '3000';

3. Modify the sql block rule of user jack

   SET PROPERTY FOR 'jack' 'sql_block_rules' = 'rule1, rule2';

4. Modify the cpu usage limit of user jack

   SET PROPERTY FOR 'jack' 'cpu_resource_limit' = '2';

5. Modify the user's resource tag permissions

   SET PROPERTY FOR 'jack' 'resource_tags.location' = 'group_a, group_b';

6. Modify the user's query memory usage limit, in bytes

   SET PROPERTY FOR 'jack' 'exec_mem_limit' = '2147483648';

7. Modify the user's query timeout limit, in second

   SET PROPERTY FOR 'jack' 'query_timeout' = '500';

Keywords

SET, PROPERTY

Best Practice