[Koha-bugs] [Bug 13810] New: Prevent updatedatabase.pl from breaking because of case insensitive utf8 collation

[bugzilla-daemon at bugs.koha-community.org]

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=13810

            Bug ID: 13810
           Summary: Prevent updatedatabase.pl from breaking because of
                    case insensitive utf8 collation
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P5 - low
         Component: Architecture, internals, and plumbing
          Assignee: gmcharlt at gmail.com
          Reporter: nicolas.legrand at bulac.fr
        QA Contact: testopia at bugs.koha-community.org

When upgrading database from 3.18 to master upgrade Upgrade to 3.19.00.006 (Bug
11944 - Convert DB tables to utf8_unicode_ci) may fail like this:

DBD::mysql::db do failed: Duplicate entry 'ACQ-995-a' for key 'PRIMARY' at
./installer/data/mysql/updatedatabase.pl line 9671.

This is from table marc_subfield_structure where the keys are made of framework
(ACQ), tagfield (995) and tagsubfield (a). If we have a key ACQ-995-A it thinks
the entries are duplicates, because the collation is case insensitive. It's
rather annoying, since it's legit in mark to have a subfield 'a' different from
subfield 'A' inside the same subfield.

I propose to default collation on one which is not case insensitive, like
utf8_bin.

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