Public bug reported:
The packet postgresql-plperl (and probably other addon packages for
postgresql) blocks do-release-upgrade from 16.04LTS to 18.04LTS.
This requiresthen requires a complete dump-and-restore cycle:
1) Stop user applications
2) do a full database export
3) stop postgresql
4) uninstall postgresql and all subpackages
5) delete remaining tablespace directories
6) do-release-upgrade
7) reinstall postgresql and the required subpackages
8) restore database from backup
9) start user applications
This requires a much longer downtime than just using pg_upgradecluster,
because the database is offline during the whole do-release-upgrade
cycle.
** Affects: ubuntu-meta (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1787349
Title:
postgresql-plperl-9.5 blocks do-release-upgrade from 16.04 to 18.04
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