[Bug 1825563] [NEW] Upgrade to Ubuntu 19.04 removed PostgreSQL databases

[Michael Kuhn]

Public bug reported:

While upgrading to Ubuntu 19.04, the release upgrader removed
postgresql-10. To make matters worse, apt/dpkg did NOT ask whether the
databases should be kept and simply removed all of them.

I believe this is due to removal_blacklist.cfg containing
^postgresql-.*[0-9]\.[0-9].*, which does not match newer releases such
as postgresql-10 as it expects an X.Y version scheme. Something like
^postgresql-.*[0-9].* should probably be added in addition.

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1825563

Title:
  Upgrade to Ubuntu 19.04 removed PostgreSQL databases

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  While upgrading to Ubuntu 19.04, the release upgrader removed
  postgresql-10. To make matters worse, apt/dpkg did NOT ask whether the
  databases should be kept and simply removed all of them.

  I believe this is due to removal_blacklist.cfg containing
  ^postgresql-.*[0-9]\.[0-9].*, which does not match newer releases such
  as postgresql-10 as it expects an X.Y version scheme. Something like
  ^postgresql-.*[0-9].* should probably be added in addition.

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