| From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, David Steele <david(at)pgmasters(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> |
| Subject: | Re: PATCH: Exclude additional directories in pg_basebackup |
| Date: | 2016-08-17 23:56:39 |
| Message-ID: | CAB7nPqSjr-nXHU2SN7yeN90HWYPXDwj=WepFer+H3DEVK5KfHQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Aug 18, 2016 at 1:35 AM, Alvaro Herrera
<alvherre(at)2ndquadrant(dot)com> wrote:
> I don't remember how pg_snapshot works, but it's probably fine
> to start with an empty subdir (is it possible to export a snapshot from
> a prepared transaction?)
From xact.c:
/*
* Likewise, don't allow PREPARE after pg_export_snapshot. This could be
* supported if we added cleanup logic to twophase.c, but for now it
* doesn't seem worth the trouble.
*/
if (XactHasExportedSnapshots())
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot PREPARE a transaction that has exported snapshots")));
So that's fine.
--
Michael
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