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  1. Qt
  2. QTBUG-95639

MariaDB 10.6 prepared queries metadata cache causes breakage in mysql driver

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Details

    • Linux/X11
    • 549ee216fd5bf2b3810e940bcbd4bbd8c64ac73f (qt/qtbase/dev) 94d22e0bcc893448d53b718f4a2732bd13fc21e4 (qt/qtbase/6.2) b3e0cdedc681c27e9b2b2dcdd4f1e1420adf5a73 (qt/qtbase/5.12) 1c6066148c (qt/tqtc-qtbase/5.15) 1c6066148c (qt/tqtc-qtbase/tqtc/vxworks-5.15.10)

    Description

      MariaDB 10.6 introduced cached metadata for prepared queries:

      https://github.com/MariaDB/server/commit/295f3e4cfb4a8f132f36d53475efc92f2487aa97

      This has been identified to cause breakage in applications using Qt's mysql driver:

      digikam:

      https://bugs.archlinux.org/task/71582

      https://bugs.kde.org/show_bug.cgi?id=440296

      mythtv:

      https://bugs.archlinux.org/task/71753

      https://github.com/MythTV/mythtv/issues/373

      Note that, due to QTBUG-95071, this is not noticeable in unpatched Qt, because the two bugs "cancel each other out": QTBUG-95071 causes MariaDB 10.6 to be identified as an old version not supporting prepared queries, so these issues don't happen (but that's obviously just an accident)

       

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          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95071 mysql client version detection broken with MariaDB 10.6

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
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              thiago Thiago Macieira
              arojas Antonio Rojas
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                Created:
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                Resolved:

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