Re: PATCH: Exclude additional directories in pg_basebackup

On Thu, Aug 18, 2016 at 1:35 AM, Alvaro Herrera
<alvherre@2ndquadrant.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
addedcleanup logic to twophase.c, but for now it    * doesn't seem worth the trouble.    */   if
(XactHasExportedSnapshots())      ereport(ERROR,               (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannotPREPARE a transaction that has exported snapshots")));
 
So that's fine.
-- 
Michael