On 2018-01-09 14:08, Christoph Berg wrote:
Re: Juergen Fuchsberger 2018-01-09
<20180109130149.17725.10545.report...@wegc203058.uni-graz.at>
Due to missing postgresql-9.4-postgis-2.1 in stretch, a postgis
enabled
database becomes corrupt when upgrading from jessie to stretch since
the required postgis libraries are missing. This can cause serious
data
loss, because once upgraded to stretch, the postgis data can't be
accesed nor dumped (Database gives error "could not access file
"$libdir/postgis-2.1": no such file or directory").
Could you append the apt output to this bug? Namely, which packages
got removed? (/var/log/apt/term.log)
Also upgrading the database to postgresql-9.6 does not work.
What did you try, and what didn't work?
Probably pg_upgradecluster, and that is not supported for databases with
the postgis extension.
See my reply to #886738 and
http://lists.alioth.debian.org/pipermail/pkg-grass-devel/2017-November/064317.html
For more info, see:
http://blog.cleverelephant.ca/2016/08/postgis-upgrade.html
http://www.bostongis.com/blog/index.php?/archives/268-Using-pg_upgrade-to-upgrade-PostGIS-without-installing-an-older-version-of-PostGIS.html
As long as the postgis package is built for a single postgresql version,
upgrades cannot be supported.
When using postgis on Debian, distribution upgrades involve recreating
the postgis databases as pg_upgradecluster will fail.
Kind Regards,
Bas
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