From: Bruce Momjian <maillist@candle.pha.pa.us>
To: byronn@insightdist.com
Cc: hannu@trust.ee
Cc: daveh@insightdist.com
Cc: pgsql-hackers@postgreSQL.org
Cc: pgsql-interfaces@postgreSQL.org
Subject: Re: [HACKERS] Re: [INTERFACES] retrieving varchar size
Date: Fri, 24 Apr 1998 00:05:30 -0400 (EDT)
Message-ID: <199804240405.AAA25030@candle.pha.pa.us> (raw)
In-Reply-To: <353FFC77.55A58CF5@insightdist.com>
>
>
>
> Bruce Momjian wrote:
>
> > > The problem with that theory is this. If the frontend application just
> > > executes some random query, such as "select * from table", you really do not
> > > know anything about what is coming back. You must rely on the little bit of
> > > information the protocol gives you. In the case of Postgres, it gives you
> > > the fieldname, datatype, and size for each column in the result.
> > > Unfortunately, for varchar and char(n), the size reports -1. This is not
> > > very helpful for describing the result set.
> > >
> > > Your above example works fine (in fact we use that already) when you know the
> > > table and column name, as in metadata functions such as SQLColumns() in the
> > > ODBC driver.
> >
> > Yep. We could pass back atttypmod as part of the PGresult. I can add
> > that to the TODO list. Would that help?
>
> Yes, that would do it!
>
> Thank you for listening to our ravings on this issue.
Added to TODO:
* Add pg_attribute.atttypmod/Resdom->restypmod to PGresult structure
This is a good suggestion.
--
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)
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To: pgsql-interfaces@postgresql.org
Cc: maillist@candle.pha.pa.us, byronn@insightdist.com, hannu@trust.ee, daveh@insightdist.com, pgsql-hackers@postgreSQL.org
Subject: Re: [HACKERS] Re: [INTERFACES] retrieving varchar size
In-Reply-To: <199804240405.AAA25030@candle.pha.pa.us>
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