From: | "Henshall, Stuart - Design & Print" <SHenshall(at)westcountry-design-print(dot)co(dot)uk> |
---|---|
To: | 'Davide Romanini' <romaz(at)libero(dot)it>, pgsql-odbc(at)postgresql(dot)org |
Subject: | Re: The way Access/ODBC does updates to records |
Date: | 2003-03-20 14:48:03 |
Message-ID: | E382B5D8EDE1D6118DBE0008C759BCD6116BF7@WCPEXCHANGE |
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Lists: | pgsql-odbc |
Try using row versioning.
hth,
- Stuart
> -----Original Message-----
> From: Davide Romanini [mailto:romaz(at)libero(dot)it]
> Sent: 17 March 2003 19:16
> To: pgsql-odbc(at)postgresql(dot)org
> Subject: [ODBC] The way Access/ODBC does updates to records
>
>
> Hi,
>
> When I link postgreSQL tables to access, and try to modify a
> record, I
> found that odbc sends a query to postgresql containing a lot
> of fields
> in the WHERE clause. For example:
>
> I have a table names with fields id, name, surname, address.
> When I modify an existing record changing the name from Davide to
> Daniele, I expect that odbc sends a query like this:
> UPDATE names SET name='Daniele' WHERE id=1;
> or, in the case it looks for contamporary changes:
> UPDATE names SET name='Daniele' WHERE id=1 AND name='Davide';
>
> Instead I see it uses:
> UPDATE names SET name='Daniele' WHERE id=1 AND name='Davide' AND
> surname='Romanini' AND address='My address';
>
> It wouldn't be a problem, but with some datatypes (dates, doubles for
> example) and sometimes with triggers that change data before updates,
> it has problems like the "Another user is changing the same data".
>
> I want to know if there's a way to force access (or odbc) to use only
> primary key fields in the WHERE clause for un UPDATE (there aren't
> reasons to use other fields).
>
> Thanks, Romaz
> --
> Davide Romanini
>
>
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