授予使用情况PostgreSQL中将来创建的模式的特权 [英] grant usage & privileges on future created schema in PostgreSQL

问题描述

我现在集成的应用程序将创建新的架构。 （每个客户都有其自己的架构，例如schema1，schema2，schema3 .... etc）
要授予对新创建的架构和该架构中特定表的使用和只读访问权限，我执行以下命令：

The application I am integrating now will create new schemas. (each customer has its owned schema, eg. schema1, schema2, schema3 ....etc) To grant usage and read-only access to the new created schema and specific tables in the schema, I execute these commands:

GRANT USAGE ON SCHEMA schema1 TO read_only_user;
GRANT SELECT ON schema1.talbe1 TO read_only_user;
GRANT SELECT ON schema1.table2 TO read_only_user;

GRANT USAGE ON SCHEMA schema2 TO read_only_user;
GRANT SELECT ON schema2.talbe1 TO read_only_user;
GRANT SELECT ON schema2.table2 TO read_only_user;

(......and so on.....)

我只是想知道我是否可以准予使用&将来在PostgreSQL中创建的模式具有特权。只能找到更改将来创建的表的默认权限的方法，而不能找到将来创建的模式的默认权限。

I just wonder if I could grant usage & privileges on future created schema in PostgreSQL. Could only find ways to alter default privileges on future created tables but not future created schemas.

推荐答案

模式没有默认权限。但是，由于使用的模型使每个用户都有自己的模式，因此可以自动执行整个过程，包括根据需要创建用户和设置密码：

There are no default privileges for schemas. But since you are using a model whereby every user has its own schema you can automate the full process, including creating the user and setting a password, if needed:

CREATE FUNCTION new_user_schema (user text, pwd text) RETURNS void AS $$
DECLARE
  usr name;
  sch name;
BEGIN
  -- Create the user
  usr := quote_identifier(user);
  EXECUTE format('CREATE ROLE %I LOGIN PASSWORD %L', usr, quote_literal(pwd));

  -- Create the schema named after the user and set default privileges
  sch := quote_identifier('sch_' || user);
  EXECUTE format('CREATE SCHEMA %I', sch);
  EXECUTE format('ALTER SCHEMA %I OWNER TO %L', sch, usr);
  EXECUTE format('ALTER DEFAULT PRIVILEGES IN SCHEMA %I
                    GRANT SELECT ON TABLES TO %L', sch, usr);
END; $$ LANGUAGE plpgsql STRICT;

然后，您可以使用简单的命令创建用户，创建架构并设置默认权限：

You can then create the user, create the schema and set up default privileges with a simple command:

SELECT new_user_schema('new_user', 'secret');

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