From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
---|---|
To: | v(dot)suryaprabha(at)gmail(dot)com |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: how to prevent generating same clipids |
Date: | 2006-04-11 21:14:09 |
Message-ID: | 20060411211409.GA13790@svana.org |
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Lists: | pgsql-general |
On Mon, Apr 10, 2006 at 10:43:16PM -0700, v(dot)suryaprabha(at)gmail(dot)com wrote:
> Hi
> Now we cannot change the field type. Because already our application
> is running and thousands of records are already entered. we are getting
> same no for clipid when 2 users are entering data at a time. so how to
> solve the problem
You don't need to change the field type, you just need to use a
sequence. i.e. nextval/currval. Wherever you're doing max()+1 do a
nextval() instead (after reading the documentation ofcourse).
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.
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