From: | elein <elein(at)varlena(dot)com> |
---|---|
To: | "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, elein <elein(at)varlena(dot)com>, "news(dot)postgresql(dot)org" <jlim(at)natsoft(dot)com(dot)my>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: CHAR(n) always trims trailing spaces in 7.4 |
Date: | 2004-02-18 00:27:13 |
Message-ID: | 20040217162713.H25537@cookie.varlena.com |
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Lists: | pgsql-hackers pgsql-sql |
Apparently the ::char is cast to varchar and then text?
That explains x || ' ' || x
On Tue, Feb 17, 2004 at 05:07:24PM -0700, scott.marlowe wrote:
> On Tue, 17 Feb 2004, Tom Lane wrote:
>
> > elein <elein(at)varlena(dot)com> writes:
> > > This is an example of the problem. It used to expand
> > > the middle thing to 15.
> >
> > > elein=# select 'x' || ' '::char(15) || 'x';
> > > ?column?
> > > ----------
> > > xx
> > > (1 row)
> >
> > Still does, but then the spaces go away again when the value goes into
> > the concatenation, because concatenation is a text operator.
>
> But then this:
>
> select 'x'||' '||'x'
>
> should produce xx, but it produces x x.
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