DO

Do ::= DO [ LANGUAGE lang_name ] code;

--创建用户webuser。
mogdb=# CREATE USER webuser PASSWORD 'xxxxxx';

--授予用户webuser对模式tpcds下视图的所有操作权限。
mogdb=# DO $$DECLARE r record;
BEGIN
    FOR r IN SELECT c.relname table_name,n.nspname table_schema FROM pg_class c,pg_namespace n
             WHERE c.relnamespace = n.oid AND n.nspname = 'tpcds' AND relkind IN ('r','v')
    LOOP
        EXECUTE 'GRANT ALL ON ' || quote_ident(r.table_schema) || '.' || quote_ident(r.table_name) || ' TO webuser';
    END LOOP;
END$$;


--删除用户webuser。
mogdb=# DROP USER webuser CASCADE;