创建 SETTINGS PROFILE

创建可以分配给用户或角色的 settings profile。

语法：

CREATE SETTINGS PROFILE [IF NOT EXISTS | OR REPLACE] name1 [, name2 [,...]] 
    [ON CLUSTER cluster_name]
    [IN access_storage_type]
    [SETTINGS variable [= value] [MIN [=] min_value] [MAX [=] max_value] [CONST|READONLY|WRITABLE|CHANGEABLE_IN_READONLY] | INHERIT 'profile_name'] [,...]
    [TO {{role1 | user1 [, role2 | user2 ...]} | NONE | ALL | ALL EXCEPT {role1 | user1 [, role2 | user2 ...]}}]

ON CLUSTER 子句允许在集群上创建 SETTINGS PROFILE，参见 Distributed DDL。

示例

创建用户：

CREATE USER robin IDENTIFIED BY 'password';

创建 max_memory_usage_profile SETTINGS PROFILE，为 max_memory_usage 设置指定取值和约束，并将其分配给用户 robin：

CREATE
SETTINGS PROFILE max_memory_usage_profile SETTINGS max_memory_usage = 100000001 MIN 90000000 MAX 110000000
TO robin