Re: ALTER TABLE lock downgrades have broken pg_upgrade

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: ALTER TABLE lock downgrades have broken pg_upgrade
Date: 2016-05-03 17:25:41
Message-ID: 20160503172541.GA31942@alvherre.pgsql
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Stephen Frost wrote:
> * Alvaro Herrera (alvherre(at)2ndquadrant(dot)com) wrote:
> > Tom Lane wrote:
> >
> > > More generally, though, I wonder how we can have some test coverage
> > > on such cases going forward. Is the patch below too ugly to commit
> > > permanently, and if so, what other idea can you suggest?
> >
> > I suggest a buildfarm animal running a custom buildfarm module that
> > exercises the pg_upgrade test from every supported version to the latest
> > stable and to master -- together with your proposed case that leaves a
> > toastless table around for pg_upgrade to handle.
>
> That would help greatly with pg_dump test coverage as well.. One of the
> problems of trying to get good LOC coverage of pg_dump is that a *lot*
> of the code is version-specific...

If we can put together a script that runs test.sh for various versions
and then verifies the runs, we could use it in both buildfarm and
coverage.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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