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查询权限

ClickHouse中的查询可以分为几种类型:

  1. 读取数据查询: SELECT, SHOW, DESCRIBE, EXISTS.
  2. 写入数据查询: INSERT, OPTIMIZE.
  3. 更改设置查询: SET, USE.
  4. DDL 查询: CREATE, ALTER, RENAME, ATTACH, DETACH, DROP TRUNCATE.
  5. KILL QUERY.

以下设置按查询类型规范用户权限:

  • 只读 — Restricts permissions for all types of queries except DDL queries.
  • allow_ddl — Restricts permissions for DDL queries.

KILL QUERY 可以与任何设置进行。

只读

限制读取数据、写入数据和更改设置查询的权限。

查看查询如何划分为多种类型 以上.

可能的值:

  • 0 — All queries are allowed.
  • 1 — Only read data queries are allowed.
  • 2 — Read data and change settings queries are allowed.

设置后 readonly = 1,用户无法更改 readonlyallow_ddl 当前会话中的设置。

使用时 GET 方法中的 HTTP接口, readonly = 1 自动设置。 要修改数据,请使用 POST 方法。

设置 readonly = 1 禁止用户更改所有设置。 有一种方法可以禁止用户
从只更改特定设置,有关详细信息,请参阅 对设置的限制.

默认值:0

allow_ddl

允许或拒绝 DDL 查询。

查看查询如何划分为多种类型 以上.

可能的值:

  • 0 — DDL queries are not allowed.
  • 1 — DDL queries are allowed.

你不能执行 SET allow_ddl = 1 如果 allow_ddl = 0 对于当前会话。

默认值:1