Hmmmmm

From: Stefan Jakobsson <stefan_at_areldata.se>
Date: Fri, 25 Jan 2002 02:52:18 -0800
Message-ID: <F001.003FAF4E.20020125023521@fatcity.com>

Having a small problem I need some help with...

The problem is trying to lock a row on a parameter table for an application.

The thing we need to do is following:

Read the value in one row. LOCK that row for other users, increase the value with one
update the row with the new value and release if for access to other users.

We are trying to use the following SQL statement.

SELECT medlnr FROM parametrar FOR UPDATE OF medlnr NOWAIT;

But the thing is that when we try, anyone can head on in and select the same value
and even make an update of that row...

What am I missing here?

Regards,
Stefan Jakobsson
Programmer
Arel-Data
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--

Author: Stefan Jakobsson
  INET: stefan_at_areldata.se

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