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    Call for Presentations - Qt World Summit

    Selecting data from mysql using qt?

    General and Desktop
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    • L
      lyuts last edited by

      Solution 1:
      @find /opt/lampp -name '*.log'@
      This might need sudo'ing.

      Solution 2:
      If 1st fails then you need to find the config files for mysql (it should be located in /opt/lampp directory) and try to find out what is the location of mysql's log files.

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

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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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