Selecting data from mysql using qt?
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how can i check that mysql logs and from where?
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[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@
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this command didnt return something
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root@zafar-laptop:/# find /opt/lampp -name log -type d
root@zafar-laptop:/#
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i have a folder inside lampp with the name logs. is it the one which your are talking about
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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. -
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 -
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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1st solution returns this
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root@zafar-laptop:/# find /opt/lampp -name *.log
/opt/lampp/htdocs/xampp/contrib/sqlnet.log
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with which editor i can view that .conf file. with gedit or something.
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[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.
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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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the file my.cnf is in etc/mysql folder
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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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this is the socket line in my.cnf
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socket = /var/run/mysqld/mysqld.sock
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ok then the wrong socket guess was wrong... but let's make it sure:
sudo ls -l /var/run/mysqld/*
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after running this sudo ls -l /var/run/mysqld/* there is nothing inside run directory
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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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both of them didnt return any resutl
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root@zafar-laptop:/# find /var -name mysqld.sock
root@zafar-laptop:/# find /opt -name mysqld.sock
root@zafar-laptop:/#
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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.
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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.