如何撤消列权限

Question

我想撤消所有列权限。

SELECT * FROM information_schema.column_privileges where grantee='PUBLIC' and privilege_type='UPDATE';

我想返回空的sql。

我试图从postgres和公共用户撤销所有表和数据库，但没有任何改变。 像这些sql命令一样;

REVOKE ALL PRIVILEGES ON SCHEMA information_schema FROM postgres;

REVOKE ALL PRIVILEGES ON SCHEMA information_schema FROM public;

revoke all privileges on table information_schema from public;

REVOKE ALL PRIVILEGES ON DATABASE "db_name" FROM public;