Note: we currently happen to run the acceptance tests with MariaDB:10.2 as the backend database.
(it could well have been any MariaDB version, or MySQL, PostgreSQL or Oracle)
There are too many acceptance tests to be running them all with all databases on every PR!
Should we switch from MariaDB:10.2 to MariaDB:10.4 for the acceptance tests?
Or is it better to be running an "older" version of MariaDB?

Anyone please comment, specially if you think there is something extra that should be done to verify support for MariaDB:10.4

Codecov Report

Merging #36800 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #36800   +/-   ##
=========================================
  Coverage     64.68%   64.68%           
  Complexity    19121    19121           
=========================================
  Files          1269     1269           
  Lines         74778    74778           
  Branches       1320     1320           
=========================================
  Hits          48372    48372           
  Misses        26018    26018           
  Partials        388      388

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@phil-davis Thank you for testing this.
IMO this is sufficient for now.
We should run our acceptance tests on mariadb 10.2 and switch to mariadb 10.3 when the LTS distros are using it.

According to the web, Ubuntu 20.04 Focal will have mariadb 10.3

@DeepDiver1975 @felixboehm @pmaier1 Any opinions?

@DeepDiver1975 @felixboehm @pmaier1 ping - Any opinions?
Is this OK to merge (and thus officially support MariaDb:10.4 with ownCloud 10.4 release)?

Added some people as reviewers - that might get them to notice this PR and comment.