Qt Forum

    • Login
    • Search
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Unsolved

    Call for Presentations - Qt World Summit

    Selecting data from mysql using qt?

    General and Desktop
    7
    150
    97419
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • 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.

      1 Reply Last reply Reply Quote 0
      • D
        doforumda last edited by

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

        1 Reply Last reply Reply Quote 0
        • D
          doforumda last edited by

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

          1 Reply Last reply Reply Quote 0
          • 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.

            1 Reply Last reply Reply Quote 0
            • 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.

              1 Reply Last reply Reply Quote 0
              • D
                doforumda last edited by

                the file my.cnf is in etc/mysql folder

                1 Reply Last reply Reply Quote 0
                • 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.

                  1 Reply Last reply Reply Quote 0
                  • D
                    doforumda last edited by

                    this is the socket line in my.cnf

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

                    1 Reply Last reply Reply Quote 0
                    • 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/*

                      1 Reply Last reply Reply Quote 0
                      • D
                        doforumda last edited by

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

                        1 Reply Last reply Reply Quote 0
                        • 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

                          1 Reply Last reply Reply Quote 0
                          • 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:/#
                            @

                            1 Reply Last reply Reply Quote 0
                            • 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.

                              1 Reply Last reply Reply Quote 0
                              • 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.

                                1 Reply Last reply Reply Quote 0
                                • 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

                                  1 Reply Last reply Reply Quote 0
                                  • 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.

                                    1 Reply Last reply Reply Quote 0
                                    • D
                                      doforumda last edited by

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

                                      1 Reply Last reply Reply Quote 0
                                      • D
                                        doforumda last edited by

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

                                        1 Reply Last reply Reply Quote 0
                                        • 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
                                          ?

                                          1 Reply Last reply Reply Quote 0
                                          • D
                                            Dii last edited by

                                            gosh... all with sudo please

                                            1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post