Subject: Re: logical replication syntax (was DROP SUBSCRIPTION,
 query cancellations and slot handling)
To: Petr Jelinek <petr.jelinek@2ndquadrant.com>, Tom Lane <tgl@sss.pgh.pa.us>
References: 
 <CA+TgmoZmkbpAWRzVKDVcHnTBkYjJEFS8=09RL-G3zgdozCLFHQ@mail.gmail.com>
 <27478.1493727233@sss.pgh.pa.us> <29431.1493730652@sss.pgh.pa.us>
 <360a1932-7af4-609b-94f1-2ad419430869@2ndquadrant.com>
 <9174dc31-787a-a2f6-818f-cb4a5c1dfddb@2ndquadrant.com>
 <30166.1493731904@sss.pgh.pa.us>
 <daf9909a-7033-9cfe-a8cc-a606025820fc@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>,
 Michael Paquier <michael.paquier@gmail.com>,
 PostgreSQL mailing lists <pgsql-hackers@postgresql.org>
From: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Organization: 2ndQuadrant
Message-ID: <2b931e0e-d9f2-c79e-b74b-91df2f915e66@2ndquadrant.com>
Date: Mon, 8 May 2017 16:55:36 -0400
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0)
 Gecko/20100101 Thunderbird/45.8.0
MIME-Version: 1.0
In-Reply-To: <daf9909a-7033-9cfe-a8cc-a606025820fc@2ndquadrant.com>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
Precedence: bulk
Sender: pgsql-hackers-owner@postgresql.org

On 5/5/17 13:01, Petr Jelinek wrote:
> What do you think of attached. I actually did add RESTRICT/CASCADE, in a
> way that if there is slot RESTRICT will refuse to drop subscription and
> CASCADE will try to drop it. Still all errors.
> 
> The new way to not drop slot is to set slot_name to NONE which is new
> value that I invented (inspiration from OWNED BY sequences) which
> basically disassociates the subscription from slot.
> 
> It's slightly less automatic this way but perhaps that's not a bad
> thing, at least nobody will drop slots by mistake while we still make
> sure that slots are not left over without anybody noticing.

I think this is OK.  Could you send a version of this patch based on
master please?

-- 
Peter Eisentraut              http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


-- 
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers