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Re: How to ensure only one session runs PL/SQL proc at a time?

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Thu, 23 Aug 2001 10:13:14 +0100
Message-ID: <998557822.22905.0.nnrp-01.9e984b29@news.demon.co.uk>

Have a look at the dbms_lock package.
It exposes the normal enqueue mechanism
to PL/SQL and allows you to take out 'UL' locks - but I think it has one extra special feature that you can define a lock to stay held across commits until explicitly released.

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Peter Marshall wrote in message <9m2ge2$u4i$1_at_news.x-echo.com>...

>Does anyone know of an easy way to do this? I have a PL/SQL procedure co
>mpiled in a package. I want to make sure that two sessions can't be runn
>ing the procedure at the same time. It should work just like a database
>resource lock -- the second comer waits until the first one is finished,
> then it can run the procedure.
>
>I thought of using a lock on a database object (eg. the procedure tries
>to take exclusive lock on a table, then release it at the end of the pro
>cedure). But this wouldn't work, since I do DDL during the procedure, wh
>ich would release the lock...
>
>I have looked around the manuals and thought about it, but nothing comes
> to mind. Does anyone have a good solution for this?
>
>Thanks and regards,
>Peter
>
>
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Received on Thu Aug 23 2001 - 04:13:14 CDT

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