Re: [GENERAL] char(xx) problem

Sorry PG is 6.4.2
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----- Original Message -----
From: Gene Selkov, Jr. <selkovjr(at)mcs(dot)anl(dot)gov>
To: Nikolay Mijaylov <nmmm(at)nmmm(dot)nu>
Cc: pgsql-general <pgsql-general(at)postgreSQL(dot)org>
Sent: петък, Декември 17, 1999 04:02
Subject: Re: [GENERAL] char(xx) problem

> > Hi
> > we have two servers with installed Linux and PostGreSQL. They are quite
> > same. One is for development (Linux 2.2.9; 128 MB RAM; very overloaded
with
> > processes), another for real HTTP serving in Internet (Linux 2.2.9; 64
MB
> > RAM; only http and pgsql)
> >
> > In one of projects we had two tables:
> >
> > create table a(
> > x char(2)
> > );
> >
> > create table b(
> > y char(3)
> > );
> >
> > When we try to execute SQL like this:
> >
> > select * from a, b
> > where a.x = b.y;
> >
> > one of servers selects 5-6 records (e.g. all mached records)
> > another selects empty table.
> >
> > The database is one and same.
>
> What are the versions of pg?
>
> I have similar experience. I used to routinely join on char() and
> text, or on char() attributes of different length. Can't do that
> anymore. Not sure when the change occurred -- some time between 6.3
> and 6.5. The problem is I beleive related to blank padding: it formerly
> showed through only in selects, now it affects comparison as well.
>
> I'm just wondering: are there any alternatives to blank padding? Why
> is it done in the first place?
>
> --Gene
>
> ************