You can also flip the 'row versioning' switch in the drver...this causes it to generate a where clause based on the key
only. This was discussed in depth a couple of months back on this list.
Merlin
-----Original Message-----
From: pgsql-odbc-owner@postgresql.org [mailto:pgsql-odbc-owner@postgresql.org] On Behalf Of
laurie.burrow@powerconv.alstom.com
Sent: Thursday, January 06, 2005 4:51 AM
To: pgsql-odbc@postgresql.org
Subject: [ODBC] 'No Current Record' using Access linked to Postgres via ODBC - A possible resolution
Problem
-------------
Using MS Access to read/write a Postgres database using ODBC get the error message 'No Current Record' when making a
simpleupdate to a table record through the Access default form interface. The table has a integer primary key and other
fieldsincluding a timestamp field. The problem is experienced only on some rows.There is no obvious difference between
rowsthat work and rows that don't.
Although this problem is similar to that mentioned in several earlier postings, I found no definitive answer through
Google.I have posted the resolution here in case it helps others with a similar predicament.
Resolution
----------------
When Access issues the update to Postgres though ODBC it creates an update SQL query that uses all fields in the row as
the'where' clause. This includes the timestamp field. However, in the roundtrip from Postgres to Access on row read and
thenback to Postgres on row update the timestamp field loses resolution. As a result the 'where' clause does not match
thecorresponding Postgres record on the timestamp field. The update fails and Access reports 'No Current Record'.
The solution is to reduce the resolution of the timestamp stored in Postgres e.g. using a trigger and the date_trunc()
function.
Laurie Burrow
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