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    Solved I Can't able to connect QMYSQL Driver in QT Creator 4.9.2 and QT 5.12.4

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    • S
      Surendar Dharani last edited by

      Hi,

      Please help me connect QT with Mysql.

      When i tries it showing following error.

      OS : Ubuntu 18.04 64 bit

      Error :

      QSqlDatabase: QMYSQL driver not loaded
      QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7

      QT : Using Open Source Licence.

      I am new to QT and CPP so please guide me step by step.

      Thanks in advance.

      1 Reply Last reply Reply Quote 0
      • SGaist
        SGaist Lifetime Qt Champion last edited by

        Hi and welcome to devnet,

        Please take the time to search this forum for this kind of question, it has been asked many times already.

        Interested in AI ? www.idiap.ch
        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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        • S
          Surendar Dharani last edited by

          Can you please share some links for that. Because i tried there is all solutions only for windows system but i need ubuntu OS. Thanks in advance.

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          • SGaist
            SGaist Lifetime Qt Champion last edited by

            Strange, the seconde hit of google points here.

            Interested in AI ? www.idiap.ch
            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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            • S
              Surendar Dharani last edited by

              Hi I got this when i runs ldd,

              linux-vdso.so.1 (0x00007ffe64dc3000)
              libQt5Sql.so.5 => /opt/Qt/5.9/gcc_64/plugins/sqldrivers/./../../lib/libQt5Sql.so.5 (0x00007f0594b18000)
              libQt5Core.so.5 => /opt/Qt/5.9/gcc_64/plugins/sqldrivers/./../../lib/libQt5Core.so.5 (0x00007f05943e0000)
              libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f05941c1000)
              libmysqlclient.so.18 => not found
              libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f0593e38000)
              libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f0593a9a000)
              libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f0593882000)
              libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f0593491000)
              libicui18n.so.56 => /opt/Qt/5.9/gcc_64/plugins/sqldrivers/./../../lib/libicui18n.so.56 (0x00007f0592ff8000)
              libicuuc.so.56 => /opt/Qt/5.9/gcc_64/plugins/sqldrivers/./../../lib/libicuuc.so.56 (0x00007f0592c40000)
              libicudata.so.56 => /opt/Qt/5.9/gcc_64/plugins/sqldrivers/./../../lib/libicudata.so.56 (0x00007f059125d000)
              librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f0591055000)
              libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f0590e38000)
              libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f0590c34000)
              libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f0590a32000)
              libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f059071b000)
              /lib64/ld-linux-x86-64.so.2 (0x00007f0594f72000)
              libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f05904a9000)

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              • SGaist
                SGaist Lifetime Qt Champion last edited by

                Well, following the thread I pointed you to, what version of MySQL do you have on your city ?

                Interested in AI ? www.idiap.ch
                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                S 1 Reply Last reply Reply Quote 0
                • S
                  Surendar Dharani @SGaist last edited by

                  @sgaist in my system mysql version is,

                  mysql Ver 14.14 Distrib 5.7.27, for Linux (x86_64) using Editline wrapper

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                  • S
                    Surendar Dharani last edited by Surendar Dharani

                    Hi,

                    Following is my response when i tried qmake please help me.

                    root@surendar:/opt/Qt/5.9/Src/qtbase/src/plugins/sqldrivers/mysql# qmake "INCLUDEPATH+=/usr/include/mysql" "LIBS+=-L/usr/lib/mysql -lmysqlclient_r" mysql.pro
                    Project ERROR: Library 'mysql' is not defined.

                    1 Reply Last reply Reply Quote 0
                    • SGaist
                      SGaist Lifetime Qt Champion last edited by

                      So your version of MySQL is way older than the one used to build the Qt plugin.

                      Two options:

                      • like already suggested in the thread linked build the plugin against the version of MySQL you have installed.
                      • use the Qt version provided by your distribution if you don't use any API available in a newer version.

                      You should also take into account that you are using a 5 years old distribution, you should consider updating.

                      Interested in AI ? www.idiap.ch
                      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                      • S
                        Surendar Dharani last edited by

                        @sgaist said in I Can't able to connect QMYSQL Driver in QT Creator 4.9.2 and QT 5.12.4:

                        older

                        I am updating QT 5.9 to 5.13.0

                        And i got this error when i tried qtbase configure.

                        Error:

                        root@surendar:/opt/Qt/5.9/Src/qtbase/src/plugins/sqldrivers/mysql# qmake "INCLUDEPATH+=/usr/include/mysql" "LIBS+=-L/usr/lib/mysql -lmysqlclient_r" mysql.pro
                        Project ERROR: Library 'mysql' is not defined.

                        Once QT update finished will let you know. Thanks.

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                        • SGaist
                          SGaist Lifetime Qt Champion last edited by

                          Don't build as root.

                          As for building the plugin, follow the related documentation.

                          Interested in AI ? www.idiap.ch
                          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          • S
                            Surendar Dharani last edited by

                            @surendar-dharani said in I Can't able to connect QMYSQL Driver in QT Creator 4.9.2 and QT 5.12.4:

                            qmake "INCLUDEPATH+=/usr/include/mysql" "LIBS+=-L/usr/lib/mysql -lmysqlclient_r" mysql.pro

                            I tried to qmake but it showing follwoing error again, Please help.

                            acer@surendar:/opt/Qt/5.13.0/Src/qtbase/src/plugins/sqldrivers/mysql$ qmake "INCLUDEPATH+=/usr/include/mysql" "LIBS+=-L/usr/lib/mysql -lmysqlclient_r" mysql.pro
                            Info: creating stash file /opt/Qt/5.13.0/Src/qtbase/src/plugins/sqldrivers/.qmake.stash
                            Cannot read /opt/Qt/5.13.0/Src/qtbase/src/plugins/sqldrivers/qtsqldrivers-config.pri: No such file or directory
                            Project ERROR: Library 'mysql' is not defined.

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                            • SGaist
                              SGaist Lifetime Qt Champion last edited by

                              Please follow the documentation.

                              Interested in AI ? www.idiap.ch
                              Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                              • S
                                Surendar Dharani last edited by Surendar Dharani

                                Sorry for asking again and again,

                                I got this error now after i followed the document,

                                acer@surendar:/opt/Qt/5.13.0/Src/qtbase/src/plugins/sqldrivers/mysql$ make install
                                make: *** No rule to make target 'install'. Stop.

                                and when i tried ./configure -sql-mysql error is like

                                ERROR: Feature 'sql-mysql' was enabled, but the pre-condition 'libs.mysql' failed.

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                                • S
                                  Surendar Dharani last edited by

                                  Please anyone help on this. Thanks a lot in advance

                                  1 Reply Last reply Reply Quote 0
                                  • SGaist
                                    SGaist Lifetime Qt Champion last edited by

                                    Please show some patience before bumping your own thread. People answering here do it voluntarily and might not live in the same time zone as you.

                                    Did you install the MySQL development package from your distribution ?

                                    Interested in AI ? www.idiap.ch
                                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                    • RonaldViscarraL
                                      RonaldViscarraL last edited by

                                      Hi, in most of linux distros, there's not mysql, but mariadb, if this is the case, then you need to make a soft link to mariadb lib and call it like the mysql required

                                      S 1 Reply Last reply Reply Quote 0
                                      • S
                                        Surendar Dharani @RonaldViscarraL last edited by

                                        @ronaldviscarral Hi,

                                        Thank you very much. Please tell me how to do it by step by step. Because i'm new in this. Thanks in advance.

                                        RonaldViscarraL 1 Reply Last reply Reply Quote 0
                                        • RonaldViscarraL
                                          RonaldViscarraL @Surendar Dharani last edited by RonaldViscarraL

                                          @surendar-dharani sure, first, install mariadb in your linux distro, then as super user in a terminal (for a x64 base system):

                                          ln -s /usr/lib64/libmariadb.so.3 /usr/lib64/libmysqlclient.so.18

                                          you should adapt it to your distro paths and mariadb version

                                          S 1 Reply Last reply Reply Quote 0
                                          • S
                                            Surendar Dharani @RonaldViscarraL last edited by

                                            @ronaldviscarral said in I Can't able to connect QMYSQL Driver in QT Creator 4.9.2 and QT 5.12.4:

                                            ln -s /usr/lib64/libmariadb.so.3 /usr/lib64/libmysqlclient.so.18

                                            Hi,

                                            I have uninstalled by using following commands and installed maria DB.

                                            sudo apt-get remove --purge mysql-server mysql-client mysql-common

                                            installed mariadb by follwing command,
                                            sudo apt-get install mariadb-server

                                            And tried to compile same driver not laoded in mysql

                                            QSqlDatabase: QMYSQL driver not loaded
                                            QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7

                                            Now what to i do?

                                            RonaldViscarraL 1 Reply Last reply Reply Quote 0
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