pgsql中给10.10.10A库的某张表赋10.10.11B库的查询权限
时间: 2024-02-16 11:04:10 浏览: 56
首先,需要在10.10.10A库中创建一个用户并授予连接权限和查询权限:
```
CREATE USER user_a WITH PASSWORD 'password';
GRANT CONNECT ON DATABASE db_a TO user_a;
GRANT SELECT ON TABLE table_name TO user_a;
```
然后,在10.10.11B库中创建一个用户并授予连接权限和查询权限:
```
CREATE USER user_b WITH PASSWORD 'password';
GRANT CONNECT ON DATABASE db_b TO user_b;
GRANT SELECT ON TABLE table_name TO user_b;
```
接下来,在10.10.11B库中创建一个可信任的函数,用于在10.10.11B库中执行查询:
```
CREATE FUNCTION fn_query_table() RETURNS TABLE (...) AS $$
BEGIN
RETURN QUERY SELECT ... FROM table_name;
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;
ALTER FUNCTION fn_query_table OWNER TO user_b;
```
最后,在10.10.10A库中创建一个用于执行查询的函数并授予执行权限:
```
CREATE FUNCTION fn_execute_query() RETURNS TABLE (...) AS $$
BEGIN
RETURN QUERY EXECUTE 'SELECT * FROM fn_query_table()';
END;
$$ LANGUAGE plpgsql SECURITY DEFINER;
ALTER FUNCTION fn_execute_query OWNER TO user_a;
GRANT EXECUTE ON FUNCTION fn_execute_query() TO user_a;
```
现在,用户user_a可以通过执行fn_execute_query()函数来查询10.10.11B库中的表table_name了。
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