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Selecting data from mysql using qt?

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    lyuts
    wrote on 12 Oct 2010, 10:54 last edited by
    #85

    [quote author="doforumda" date="1286880547"]how can i check that mysql logs and from where? [/quote]

    Try to find them:
    @find /opt/lampp -name log -type d@

    When you find the log directory, find a log for mysql and use tail utility:

    @tail -f /path/to/mysql.log@

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

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    • D Offline
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      doforumda
      wrote on 12 Oct 2010, 10:56 last edited by
      #86

      this command didnt return something
      @
      root@zafar-laptop:/# find /opt/lampp -name log -type d
      root@zafar-laptop:/#
      @

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        doforumda
        wrote on 12 Oct 2010, 11:01 last edited by
        #87

        i have a folder inside lampp with the name logs. is it the one which your are talking about

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        • L Offline
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          lyuts
          wrote on 12 Oct 2010, 11:01 last edited by
          #88

          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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            doforumda
            wrote on 12 Oct 2010, 11:03 last edited by
            #89

            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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              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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                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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                  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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                    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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                      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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                        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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                          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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                            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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                              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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                                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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                                  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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                                      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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                                        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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                                          12 Oct 2010, 11:08

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