Обсуждение: for row in select loop question

The following function does not work:

CREATE FUNCTION InstallPermissions(varchar, varchar) RETURNS int2 AS 'DECLARE                options ALIAS FOR $1;
usernameALIAS FOR $2;
 
BEGINFOR row IN select * from pg_tables LOOP            REVOKE ALL ON row.tablename FROM username;      GRANT options
onrow.tablename TO username;END LOOP;return 0;END; ' LANGUAGE 'plpgsql';
 

"select InstallPermissions('test1', 'test2);"  returns an error at "select".
Any suggestions on how to eliminate the error?

Thanks, Michael

>
> The following function does not work:
>
> CREATE FUNCTION InstallPermissions(varchar, varchar) RETURNS int2 AS '
>    DECLARE
>         options ALIAS FOR $1;
>         username ALIAS FOR $2;
> BEGIN
>    FOR row IN select * from pg_tables LOOP
>           REVOKE ALL ON row.tablename FROM username;
>           GRANT options on row.tablename TO username;
>    END LOOP;
>    return 0;
>  END; ' LANGUAGE 'plpgsql';
>
> "select InstallPermissions('test1', 'test2);"  returns an error at "select".
> Any suggestions on how to eliminate the error?

    First you forgot to declare 'row'. Could be type record.

    Second  REVOKE and GRANT are utility statements not supported
    for prepared SPI plans and  thus  PL/pgSQL  currently  cannot
    execute them.


Jan

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