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Selecting data from mysql using qt?

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  • D Offline
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    Dii
    wrote on 12 Oct 2010, 11:04 last edited by
    #90

    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 Offline
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      doforumda
      wrote on 12 Oct 2010, 11:05 last edited by
      #91

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

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      • D Offline
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        doforumda
        wrote on 12 Oct 2010, 11:07 last edited by
        #92

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

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        • L Offline
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          lyuts
          wrote on 12 Oct 2010, 11:07 last edited by
          #93

          [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 Offline
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            Dii
            wrote on 12 Oct 2010, 11:08 last edited by
            #94

            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 Offline
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              doforumda
              wrote on 12 Oct 2010, 11:09 last edited by
              #95

              the file my.cnf is in etc/mysql folder

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              • D Offline
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                Dii
                wrote on 12 Oct 2010, 11:10 last edited by
                #96

                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 Offline
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                  doforumda
                  wrote on 12 Oct 2010, 11:10 last edited by
                  #97

                  this is the socket line in my.cnf

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

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                  • D Offline
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                    Dii
                    wrote on 12 Oct 2010, 11:13 last edited by
                    #98

                    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 Offline
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                      doforumda
                      wrote on 12 Oct 2010, 11:16 last edited by
                      #99

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

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                      • D Offline
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                        Dii
                        wrote on 12 Oct 2010, 11:20 last edited by
                        #100

                        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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                          doforumda
                          wrote on 12 Oct 2010, 11:23 last edited by
                          #101

                          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 Offline
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                            lyuts
                            wrote on 12 Oct 2010, 11:27 last edited by
                            #102

                            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 Offline
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                              Dii
                              wrote on 12 Oct 2010, 11:28 last edited by
                              #103

                              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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                                Dii
                                wrote on 12 Oct 2010, 11:29 last edited by
                                #104

                                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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                                  Dii
                                  wrote on 12 Oct 2010, 11:30 last edited by
                                  #105

                                  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 Offline
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                                    doforumda
                                    wrote on 12 Oct 2010, 11:31 last edited by
                                    #106

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

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                                      doforumda
                                      wrote on 12 Oct 2010, 11:36 last edited by
                                      #107

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

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                                      • D Offline
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                                        Dii
                                        wrote on 12 Oct 2010, 11:37 last edited by
                                        #108

                                        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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                                        • D Offline
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                                          Dii
                                          wrote on 12 Oct 2010, 11:37 last edited by
                                          #109

                                          gosh... all with sudo please

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