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Re: pg_upgrade failing from 9.3 to 9.4 because "template0" already exists

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On Fri, May 15, 2015 at 10:51:15AM -0400, Bruce Momjian wrote:
> On Fri, May 15, 2015 at 10:49:43AM -0400, Stephen Frost wrote:
> > Bruce,
> > 
> > * Bruce Momjian (bruce@xxxxxxxxxx) wrote:
> > > On Mon, Mar  9, 2015 at 12:43:05PM -0400, Bruce Momjian wrote:
> > > > On Fri, Mar  6, 2015 at 06:10:15PM -0500, Stephen Frost wrote:
> > > > > The first is required or anyone who has done that will get the funny
> > > > > error that started this thread and things won't work anyway, but I
> > > > > believe the latter is also necessary to patch and back-patch as it could
> > > > > lead to data loss.  It's not a high potential as, hopefully, people will
> > > > > check first, but I can imagine a hosting provider or environments where
> > > > > there are lots of independent clusters not catching this issue in their
> > > > > testing, only to discover someone set their database to 'datallowconn =
> > > > > false' for whatever reason and now that database is gone...
> > > > 
> > > > Agreed. I will work on a patch for this.
> > > 
> > > Attached is a patch that implements this, and it should be backpatch to
> > > all versions.
> > 
> > Excellent and agreed.  Just looked through the patch and didn't do a
> > full review, but it looks good to me.
> 
> OK, thanks.  I will apply it all branches later today as it is a data
> loss bug.

Patch applied back through 9.0.  Thanks for the report and analysis.

-- 
  Bruce Momjian  <bruce@xxxxxxxxxx>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + Everyone has their own god. +


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