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    Call for Presentations - Qt World Summit

    Selecting data from mysql using qt?

    General and Desktop
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    • D
      doforumda last edited by

      there are 6 files in there but no mysql.log

      these are the files
      access_log, cgisock.1693, error_log, httpd.pid, php_error_log, ssl_request_log

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      • D
        Dii last edited by

        Don't bother with the log files, I guess Qt looks at the wrong place for the socket file...

        Let's check this line in your mysql config file (my.cnf):

        socket = /var/run/mysqld/mysqld.sock

        You should find my.cnf in /etc/ or /etc/mysql/ ... I don't know ubuntu that much.

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        • D
          doforumda last edited by

          1st solution returns this
          @
          root@zafar-laptop:/# find /opt/lampp -name *.log
          /opt/lampp/htdocs/xampp/contrib/sqlnet.log
          @

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          • D
            doforumda last edited by

            with which editor i can view that .conf file. with gedit or something.

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            • L
              lyuts last edited by

              [quote author="¤ Dii ¤" date="1286881470"]
              You should find my.cnf in /etc/ or /etc/mysql/ ... I don't know ubuntu that much.[/quote]

              I don't think that this config will be in /etc. He uses lampp - a preconfigured bundle. That config might be in /opt/lampp.

              I'm a rebel in the S.D.G.

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              • D
                Dii last edited by

                BTW a quick sum:

                • mysql is installed
                • database and tables are created
                • access is granted
                • qt code looks fine

                I see two possibilities here: libmysqlclient is missing, or the socket file is at different place.

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                • D
                  doforumda last edited by

                  the file my.cnf is in etc/mysql folder

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                  • D
                    Dii last edited by

                    doforumda: use gedit

                    sudo gedit /etc/mysql/my.cnf

                    at least most of the ubuntu machines have the config file there.

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                    • D
                      doforumda last edited by

                      this is the socket line in my.cnf

                      @
                      socket = /var/run/mysqld/mysqld.sock
                      @

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                      • D
                        Dii last edited by

                        ok then the wrong socket guess was wrong... but let's make it sure:

                        sudo ls -l /var/run/mysqld/*

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                        • D
                          doforumda last edited by

                          after running this sudo ls -l /var/run/mysqld/* there is nothing inside run directory

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                          • D
                            Dii last edited by

                            uhmmmmmmm that's more than strange, the socket file should be there somewhere, let's find it:

                            find /var -name mysqld.sock

                            if no result:

                            find /opt -name mysqld.sock

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                            • D
                              doforumda last edited by

                              both of them didnt return any resutl

                              @
                              root@zafar-laptop:/# find /var -name mysqld.sock
                              root@zafar-laptop:/# find /opt -name mysqld.sock
                              root@zafar-laptop:/#
                              @

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                              • L
                                lyuts last edited by

                                I have bitnami lampp stack installed and when I start it then the socket file is created in /opt/lamppstack/mysql/tmp/mysql.sock. I think doforumda shoudl have similar directory and we need to check the permissions for that directory.

                                I'm a rebel in the S.D.G.

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                                • D
                                  Dii last edited by

                                  Usually that means, that the mysql daemon is not running... but the the command line should not work as well... ;(

                                  It doesn't hurt to try to start the daemon:

                                  sudo /etc/init.d/mysql start

                                  ... and do the search for the socket file as above.

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                                  • D
                                    Dii last edited by

                                    gosh, do the find with sudo:

                                    sudo find /opt -name mysqld.sock
                                    sudo find /var -name mysqld.sock

                                    damn, I always forget that with ubuntu

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                                    • D
                                      Dii last edited by

                                      lyuts: yes, if he have the socket file at the same place, we need to symlink it to the /var/... location and happy end :) I hope so.

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                                      • D
                                        doforumda last edited by

                                        tyut: yes i have one file with the name of mysql.sock in /opt/lampp/var/mysql/mysql.sock

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                                        • D
                                          doforumda last edited by

                                          the permissions on mysql.sock it read write exe for all types of users

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                                          • D
                                            Dii last edited by

                                            Great, don't give up, we are close :D

                                            ls -l /opt/lampp/var/mysql/*

                                            maybe you have another mysql config file somewhere:

                                            ls -l /opt/lampp/etc/my.cnf
                                            or
                                            ls -l /opt/lampp/etc/mysql/my.cnf
                                            ?

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