From: | Byron Nikolaidis <byronn(at)insightdist(dot)com> |
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To: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
Cc: | hannu(at)trust(dot)ee, daveh(at)insightdist(dot)com, pgsql-hackers(at)postgreSQL(dot)org, pgsql-interfaces(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] Re: [INTERFACES] retrieving varchar size |
Date: | 1998-04-24 02:44:07 |
Message-ID: | 353FFC77.55A58CF5@insightdist.com |
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Lists: | pgsql-hackers pgsql-interfaces |
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.
Byron
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