| From: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com> |
|---|---|
| To: | Markus Sintonen <markus(dot)sintonen(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [PATCH] Pattern based listeners for asynchronous messaging (LISTEN/NOTIFY) |
| Date: | 2017-07-31 20:30:26 |
| Message-ID: | ff45c925-dbb6-8dd2-552e-18f467d18d3c@2ndquadrant.com |
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| Lists: | pgsql-hackers |
On 7/31/17 16:13, Markus Sintonen wrote:
> This patch has no know backward compatibility issues with the existing
> /LISTEN///UNLISTEN/ features. This is because patch extends the existing
> syntax by accepting quoted strings which define the patterns as opposed
> to the existing SQL literals.
I don't see that in the patch. Your patch changes the syntax LISTEN
ColId to mean a regular expression.
Even then, having LISTEN "foo" and LISTEN 'foo' mean different things
would probably be confusing.
I would think about specifying an operator somewhere in the syntax, like
you have with LISTEN SIMILAR TO. It would even be nice if a
non-built-in operator could be used for matching names.
Documentation is missing in the patch.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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