Message-ID: <459BB8FD.8030207@archonet.com>
Date: Wed, 03 Jan 2007 14:09:01 +0000
From: Richard Huxton <dev@archonet.com>
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To: ramachandra.bhaskaram@wipro.com
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL NOTIFY Help] sending NOTIFY to the external program
References: <47230CE166B64744B0120173E4C2161E0103E69F@BLR-EC-MBX01.wipro.com>
In-Reply-To: <47230CE166B64744B0120173E4C2161E0103E69F@BLR-EC-MBX01.wipro.com>
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ramachandra.bhaskaram@wipro.com wrote:
> Hi Richard Huxton,
> 
> 	Thank you for your kind response.    
> 
> 	Is there not any other way other than record the pkey in a
> "process_these" table and have the application check there.    We want
> to minimise the database transactions to improve the DB performance.
> 
> 	Can we send the exact data which has been changed using
> db-notify to the application?   So that, the application can continue
> processing the data using the Notify message from the DB.

Not via your database connection.

With one of the untrusted languages (C, pl/perlu pl/pythonu etc) you 
could do anything you could make a separate connection / write to a file 
  etc.

Does your application need to know *immediately* that a change in the 
database has occurred?

-- 
   Richard Huxton
   Archonet Ltd