Re: [HACKERS] IF [NOT] EXISTS for replication slots

On 06/02/17 05:15, Michael Paquier wrote:
> Hi all,
> 
> Lately I have bumped into a case where it would have been useful to
> make the difference between a failure because of a slot already
> dropped and an internal failure of Postgres. Is there any interest for
> support of IE and INE for CREATE and DROP_REPLICATION_SLOT?
> My use case involved only the SQL-callable interface, but I would
> think that it is useful to make this difference as well with the
> replication protocol. For the function we could just add a boolean
> argument to control the switch, and for the replication commands a
> dedicated keyword.
> 
> Any thoughts?
> 

My thought is, how would this handle the snapshot creation that logical
slot does when it's created?

--  Petr Jelinek                  http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training &
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