From: Marcin Krawczyk <jankes.mk@gmail.com>
To: Pavel Stehule <pavel.stehule@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: aggregate reverse
Date: Sat, 2 Feb 2008 09:48:27 +0100
Message-ID: <95f6bf9b0802020048r336ba75etb2cf7508d0098854@mail.gmail.com> (raw)
In-Reply-To: <162867790802010933m4f3e2808w405590b26d31d402@mail.gmail.com>
References: <95f6bf9b0802010724u5aa9b48x188af97410237d7@mail.gmail.com>
<162867790802010933m4f3e2808w405590b26d31d402@mail.gmail.com>
Yes, you got me well. That's exactly what I was trying to achieve. Thank
you.
2008/2/1, Pavel Stehule <pavel.stehule@gmail.com>:
>
> Hello
>
> I am not sure if I understand well.
>
> On 01/02/2008, Marcin Krawczyk <jankes.mk@gmail.com> wrote:
> > Hi all. I wolud like to know whether it is possible to reverse the
> behaviour
> > of an aggregate? Say I have a string '1,2,3,4'. Is there a way to split
> > those values to records?
>
> create or replace function unpack(anyarray)
> returns setof anyelement as $$
> select $1[i]
> from generate_series(array_lower($1,1), array_upper($1,1)) g(i)
> $$ language sql immutable;
>
> select * from unpack(string_to_array('1,2,3,4',','));
> unpack
> --------
> 1
> 2
> 3
> 4
> (4 rows)
>
> Regards
> Pavel
>
>
> >
> > Regards and thanks in advance.
> > mk
> >
>
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To: pgsql-sql@postgresql.org
Cc: jankes.mk@gmail.com, pavel.stehule@gmail.com
Subject: Re: aggregate reverse
In-Reply-To: <95f6bf9b0802020048r336ba75etb2cf7508d0098854@mail.gmail.com>
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