From: Bruce Momjian <maillist@candle.pha.pa.us>
To: hannu@trust.ee
Cc: hannu@trust.ee
Cc: byronn@insightdist.com
Cc: pgsql-hackers@postgreSQL.org
Cc: pgsql-interfaces@postgreSQL.org
Subject: Re: [HACKERS] Re: [INTERFACES] retrieving varchar size
Date: Thu, 23 Apr 1998 13:35:43 -0400 (EDT)
Message-ID: <199804231736.NAA29768@candle.pha.pa.us> (raw)
In-Reply-To: <353F7A47.3C8D677F@sid.trust.ee>
>
> In the latter case, I would suggest an additional SQL command for open
> cursors,
> or a pseudo table for open cursor where you could do a simple select
> statement:
>
> DECLARE CURSOR FOO_CURSOR FOR SELECT * FROM MYTABLE;
>
> SELECT _FIELD_NAME,_FIELD_TYPE,_FIELD_SIZE FROM
> FOO_CURSOR_INFO_PSEUTOTABLE;
The information you want is in pg_attribute.atttypmod. It is normally
-1, but is set for char() and varchar() fields, and includes the 4-byte
length. See bin/psql/psql.c for a sample of its use.
--
Bruce Momjian | 830 Blythe Avenue
maillist@candle.pha.pa.us | Drexel Hill, Pennsylvania 19026
+ If your life is a hard drive, | (610) 353-9879(w)
+ Christ can be your backup. | (610) 853-3000(h)
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-interfaces@postgresql.org
Cc: maillist@candle.pha.pa.us, hannu@trust.ee, byronn@insightdist.com, pgsql-hackers@postgreSQL.org
Subject: Re: [HACKERS] Re: [INTERFACES] retrieving varchar size
In-Reply-To: <199804231736.NAA29768@candle.pha.pa.us>
* 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