This is referring to private content that I am removing from Qt. Please find another way of getting the database.
Why don't you use QMimeDatabase?
|For Gerrit Dashboard: QTCREATORBUG-22636|
|266569,6||Cope with Qt 5.14's dropping of the MIME type DB as a resource||4.10||qt-creator/qt-creator||Status: MERGED||+2||0|
|266704,3||Re-fix QtCore resource path changing and prepare for Qt 5.13||4.9||qt-creator/qt-creator||Status: MERGED||+2||0|