Re: Strange interaction of union and expressions - Mailing list pgsql-general

From Oleg Bartunov
Subject Re: Strange interaction of union and expressions
Date
Msg-id Pine.GSO.4.62.0504210006210.28522@ra.sai.msu.su
Whole thread Raw
In response to Strange interaction of union and expressions  (Aaron Bingham <bingham@cenix-bioscience.com>)
List pgsql-general
I see no problem. You get what you want.

Correct query is:

select '"' || foo || '"' as foo
     from (select foo from a union select foo from b ) as bar;

Oleg

On Wed, 20 Apr 2005, Aaron Bingham wrote:

> Hello all,
>
> We noticed some very odd behavior today with Postgres 7.4.5
>
> Running the following SQL:
>
> create table a (foo varchar);
> insert into a (foo) values ('baz');
> create table b (foo varchar);
> insert into b (foo) values ('woof');
> select '"' || foo || '"' as foo
>    from (select foo from a) as bar
>        union select foo from b;
>
> Produces this output:
>
>  foo
> -------
> "baz"
> woof
> (2 rows)
>
> I would expect the following instead:
>
>  foo
> -------
> "baz"
> "woof"
> (2 rows)
>
> Is this a known issue?  Has it been fixed?
>
> Thanks,
>
>

     Regards,
         Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83

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