Re: Missing semicolumn in anonymous plpgsql block does not raise syntax error

po 3. 6. 2024 v 18:46 odesílatel Erik Wienhold <ewie@ewie.name> napsal:

On 2024-06-03 00:18 +0200, Tom Lane wrote:
> "David G. Johnston" <david.g.johnston@gmail.com> writes:
> > I think you just wrote the equivalent of:
> > l_cnt := (select 1 as delete from foo3 where id=1);
> > Which is a valid query.
>
> Still another example of the folly of letting AS be optional.
> I don't suppose we can ever undo that though.

How about inventing an opt-in strict mode (like in Perl or JavaScript)
that prevents certain footguns?  For example, disallowing bare column
labels.

That could be enabled for the current session or transaction:

    SET strict_parsing = { on | off };

Or just for individual routines:

    CREATE PROCEDURE myproc()
        SET strict_parsing = { on | off }
        LANGUAGE plpgsql ...

Probably it is not bad idea - it can be generally useful

But I think it is better to introduce a new entry for plpgsql expressions in gram.y.

Unfortunately it is not a compatible change. Years ago was popular to use a pattern

a := tab.a FROM tab

instead correct

a := (SELECT tab.a FROM tab)

or

SELECT tab.a FROM tab INTO a;

Regards

Pavel

 

--
Erik