From: Steve Atkins <steve@blighty.com>
To: pgsql-docs@postgresql.org
Subject: Re: 4.2.9. Type Casts - documentation improvement
Date: Tue, 12 Sep 2017 16:14:51 -0700
Message-ID: <96018C79-ABA3-41EB-A327-4F509D224A2A@blighty.com> (raw)
In-Reply-To: <20170912223325.GC6766@momjian.us>
References: <20170905021712.25640.86402@wrigleys.postgresql.org>
<20170912223325.GC6766@momjian.us>
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-docs>
> On Sep 12, 2017, at 3:33 PM, Bruce Momjian <bruce@momjian.us> wrote:
>
> On Tue, Sep 5, 2017 at 02:17:12AM +0000, artejera@gmail.com wrote:
>> The following documentation comment has been logged on the website:
>>
>> Page: https://www.postgresql.org/docs/9.2/static/sql-syntax.html
>> Description:
>>
>> Hi,
>>
>> There seems to be no explicit documentation of the useful construct:
>>
>> Select tt.*::text from tt
>>
>> Also related: 4.2.13. Row Constructors
>>
>> Congrats for your project. Yours AT
>
> Woh, I was not aware that worked, e.g.:
>
> test=> SELECT pg_language.*::text FROM pg_language;
> pg_language
> -------------------------------------
> (internal,10,f,f,0,0,2246,)
> (c,10,f,f,0,0,2247,)
> (sql,10,f,t,0,0,2248,)
> (plpgsql,10,t,t,12319,12320,12321,)
>
> Any idea where this should be documented. It is useful?
It's the output format of a composite type, isn't it?
steve=# select pg_language from pg_language;
pg_language
-------------------------------------
(internal,10,f,f,0,0,2246,)
(c,10,f,f,0,0,2247,)
(sql,10,f,t,0,0,2248,)
(plpgsql,10,t,t,12656,12657,12658,)
(4 rows)
https://www.postgresql.org/docs/current/static/rowtypes.html might be the place to expand on it, if so. (And converting to hstore or json or csv are other useful things to discuss too, maybe).
Cheers,
Steve
--
Sent via pgsql-docs mailing list (pgsql-docs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-docs
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-docs@postgresql.org
Cc: steve@blighty.com
Subject: Re: 4.2.9. Type Casts - documentation improvement
In-Reply-To: <96018C79-ABA3-41EB-A327-4F509D224A2A@blighty.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox