Re: Anonymous code blocks

Hi,

Petr Jelinek <pjmodos(at)pjmodos(dot)net> writes:
> I attached current version of the patch. I don't expect this to get
> committed or anything, but I'd like other eyes to take a look at it.

I'm reviewing this patch, and have early questions that might allow for
a quick returned with little feedback and much work...

Patch applies cleanly and build cleanly too, basic examples are working
fine. The problem is the following:

dim=# do $$begin select 'foo'; end;$$;
ERROR: query has no destination for result data
HINT: If you want to discard the results of a SELECT, use PERFORM instead.
CONTEXT: PL/pgSQL function "inline" line 1 at SQL statement

Here's an example not so simple as to being meaningless:

do $$
declare v text := current_setting('server_version');
begin
case when v ~ '8.5' then select 'foo'; else select 'bar'; end case;
end;$$;

And while this works:

dim=# do $$ declare i integer; begin for i in 1..10 loop raise notice '%', i; end loop; end;$$;

One might want to have this working too:

do returns setof integer as $$declare i integer; begin for i in 1..10 loop return next; end;$$;

So here are the major points about this patch:

- it's missing the returns declaration syntax (default value could be
returns void?)

- it would be much more friendly to users if it had a default output
for queries, the returned object seems a good fit

Regards,
--
dim

PS: I'll go mark as returned with feedback but intend to complete this
review in the following days, by having a look at the code and
documentation. Unless beaten to it, as I won't be able to give accurate
guidance for pursuing effort.