Typical symptom when trying to connect to MySQL / MariaDB using Qt but without the necessary plugin is the runtime error
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QMYSQL
Since the Qt Company currently doesn't give a crap on providing qsqlmysql.dll / libqsqlmysql.so in binary form, you have to build it on your own, which can be a pain. Here is a build for various Qt versions. Get precompiled qsqlmysql.dll for Windows / libqsqlmysql.so for Linux from releases
Latest Qt version: Download for Qt 6.2.3 hereDeployment
- put qsqlmysql.dll (if release build) / qsqlmysqld.dll (if debug build, but note that when using MinGW 8.1.0 the debug build is named qsqlmysql.dll as well) in application subdirectory "sqldrivers"
- put libmysql.dll (the MySQL library itself) and the OpenSSL v1.1 libraries, libcrypto-1_1 and libssl-1_1, in your application dir
If you want to use this repository for compiling it yourself: Building hints
- Unlike the original .pro file this project can be built in Qt Creator (currently works on Windows only), the source code is however unchanged
- See branches by Qt version for source code
- Make sure you link against the official MySQL C Connector v6.1/v8.0 (not C++): https://downloads.mysql.com/archives/c-c/?version=6.1.11&os=src / https://dev.mysql.com/downloads/mysql/5.5.html?os=3&version=5
- The .pro file from this repository by default expects the contents of the zip file from mysql.com to be in the same base directory as the sql driver project e.g. D:\qt\src\sqldrivers is the sql driver project dir and D:\qt\src\mysql-connector-c-x.y.z-winx64 is the MySQL connector library directory, so that there are D:\qt\src\mysql-connector-c-x.y.z-winx64\include and \lib subdirs