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notification payloads

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: notification payloads
Date: 2007-03-26 15:30:33
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Lists: pgsql-hackers
This feature (ability to add a message payload to a NOTIFY) is on the 
TODO list and I had undertaken to implement it. However, pressure of 
other work has conspired to make that difficult, and Abhijit Menon-Sen 
recently very kindly offered to help out.

Therer was some discussion of implementation late last year here:

However, in various pieces of off-list discussion it appears that there 
is some opposition either to the design or to the feature itself. What 
is more, there will clearly be vigorous opposition to any implementation 
which does NOT remove the use of pg_listener (which I understand and I 
think largely agree with).

So, before an investment of any more time is made by either Abhijit or 
myself, I would like to get confirmation that a) there is broad 
agreement on the desirability of the feature and b) that there is broad 
agreement on the general design (i.e. to use a circular buffer in shared 
memory, of configurable size, to hold the outstanding message queue). 
Please speak up or forever ....




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