On Thu, Aug 18, 2016 at 1:35 AM, Alvaro Herrera
<[email protected]> 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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