From: | Filip Rembiałkowski <filip(dot)rembialkowski(at)gmail(dot)com> |
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To: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
Cc: | Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: proposal: make NOTIFY list de-duplication optional |
Date: | 2016-02-09 19:16:53 |
Message-ID: | CAP_rww=aTu4MLPxXapUqBotSme1msr6m9st3iPSTd+fQoY4vNQ@mail.gmail.com |
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On Tue, Feb 9, 2016 at 12:15 AM, Merlin Moncure <mmoncure(at)gmail(dot)com> wrote:
> I wonder if the third argument
> should be a boolean however. If we make it 'text, 'send mode',
> instead, we could leave some room for more specialization of the
> queuing behavior.
>
> For example, we've had a couple of requests over the years to have an
> 'immediate' mode which dumps the notification immediately to the
> client without waiting for tx commit. This may or may not be a good
> idea, but if it was ultimately proved to be, it could be introduced as
> an alternate mode without adding an extra function.
But then it becomes disputable if SQL syntax change makes sense.
---we had this,
NOTIFY channel [ , payload ]
---and in this patch we have this
NOTIFY [ ALL | DISTINCT ] channel [ , payload ]
--- but maybe we should have this?
NOTIFY channel [ , payload [ , mode ] ]
I'm not sure which direction is better with non-standard SQL additions.
Recycling keywords or adding more commas?
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