Selecting data from mysql using qt?

[doforumda]

@
opt/lampp/var/mysql/phpmyadmin:
total 144
-rw-rw---- 1 nobody root 54 2004-12-06 15:56 db.opt
-rw-rw---- 1 nobody root 8682 2007-03-23 20:54 pma_bookmark.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_bookmark.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_bookmark.MYI
-rw-rw---- 1 nobody root 12964 2007-03-23 20:54 pma_column_info.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_column_info.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_column_info.MYI
-rw-rw---- 1 nobody root 8704 2007-03-11 11:50 pma_designer_coords.frm
-rw-rw---- 1 nobody root 0 2007-03-11 11:50 pma_designer_coords.MYD
-rw-rw---- 1 nobody root 1024 2007-03-11 11:50 pma_designer_coords.MYI
-rw-rw---- 1 nobody root 8730 2007-03-23 20:54 pma_history.frm
-rw-rw---- 1 nobody root 560 2010-10-11 12:21 pma_history.MYD
-rw-rw---- 1 nobody root 5120 2010-10-11 12:21 pma_history.MYI
-rw-rw---- 1 nobody root 8644 2007-03-23 20:54 pma_pdf_pages.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_pdf_pages.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_pdf_pages.MYI
-rw-rw---- 1 nobody root 8800 2007-03-23 20:54 pma_relation.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_relation.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_relation.MYI
-rw-rw---- 1 nobody root 8708 2007-03-23 20:54 pma_table_coords.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_table_coords.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_table_coords.MYI
-rw-rw---- 1 nobody root 8656 2007-03-23 20:54 pma_table_info.frm
-rw-rw---- 1 nobody root 0 2007-03-23 20:54 pma_table_info.MYD
-rw-rw---- 1 nobody root 1024 2007-03-23 20:54 pma_table_info.MYI

opt/lampp/var/mysql/test:
total 0

opt/lampp/var/mysql/testTwo:
total 24
-rw-rw---- 1 nobody nogroup 65 2010-10-10 13:13 db.opt
-rw-rw---- 1 nobody nogroup 8634 2010-10-10 13:14 testTable.frm
-rw-rw---- 1 nobody nogroup 44 2010-10-10 13:15 testTable.MYD
-rw-rw---- 1 nobody nogroup 2048 2010-10-10 22:58 testTable.MYI

@

[doforumda]

yes the second command returns this

@
root@zafar-laptop:/# sudo ls -l /opt/lampp/etc/my.cnf
-rw-r--r-- 1 root root 5030 2009-04-10 10:11 /opt/lampp/etc/my.cnf
@

[Dii]

ok doforumda, that's enough... I want to make it sure, can you check, the
sudo ls -l /opt/lampp/etc/my.cnf
or
sudo ls -l /opt/lampp/etc/mysql/my.cnf
?
If one of them is there, let's take a look with gedit, for the
socket = /something
part?

[Dii]

ok, then
sudo gedit /opt/lamp/etc/my.cnf

look for the socket = something line

[lyuts]

¤ Dii ¤, maybe this would be easier?

@sudo find /opt/lampp -name my.cnf -type f | xargs grep -n socket@

[doforumda]

Dii: i use this command sudo gedit /opt/lamp/etc/my.cnf but unfortunately the file is empty. there is nothing in it.

lyut: your command sudo find /opt/lampp -name my.cnf -type f | xargs grep -n socket

displays this
@
root@zafar-laptop:/# sudo find /opt/lampp -name my.cnf -type f | xargs
/opt/lampp/etc/my.cnf
@

[doforumda]

sorry wait

[Dii]

lyuts: yes it should be easier...

doforumda: i misstyped the command, try this:
sudo gedit /opt/lampp/etc/my.cnf

[doforumda]

lyut: your command sudo find /opt/lampp -name my.cnf -type f | xargs grep -n socket actually displays this. above one was wrong because i use the wrong command

@
root@zafar-laptop:/# sudo find /opt/lampp -name my.cnf -type f | xargs grep -n socket
21:socket = /opt/lampp/var/mysql/mysql.sock
28:socket = /opt/lampp/var/mysql/mysql.sock
44:# All interaction with mysqld must be made via Unix sockets or named pipes.
@

[doforumda]

lyut: sudo gedit /opt/lampp/etc/my.cnf this command does open my.cnf and it also have

socket = /opt/lampp/var/mysql/mysql.sock

in two lines means there are two entries for socket in my.cnf

[lyuts]

I think this is rather rough solution, but worth trying:

@sudo mkdir -p /var/run/mysqld
sudo ln -s /opt/lampp/var/mysql/mysql.sock /var/run/mysqld/mysqld.sock@

[doforumda]

so what next i think here the path for socket is correct because i have one mysql.sock file in that exactly same directory

[doforumda]

you mean i should create a dir at opt/lampp/var/run/mysqld ????

[doforumda]

millions of thanks to both of you TYUT and Dii. it works. one more question can please tell me what does this command do
@
sudo ln -s /opt/lampp/var/mysql/mysql.sock /var/run/mysqld/mysqld.sock
@

and also if i want to install everything from scratch then once i have to use this command to make it work?

[Dii]

doforumda: the problem was ~small... the Qt mysql driver looks for the socket file (the connection to mysql) in the default location (var/run/mysqld/mysqld.sock), though you had it somewhere else, because your lampp package changed the path.

The "ln -s" made a symbolic link to that, so the /var/run/mysqld/mysqld.sock point to the /opt/lampp/var/mysql/mysql.sock. This way Qt can find it. If you do a new installation, with lampp, you should do it again, if you use the regular mysql package, probably, you won't face this problem.

lyuts: great work, we deserve these points :)

[lyuts]

I think our solution is rough enough, but at least it works. I think the best solution is to set the socket parameter in my.cnf to /var/run/mysqld/mysqld.sock. But it is up to you doforumda.

bq. millions of thanks to both of you TYUT and Dii.

Hey, I'm lyuts, not TYUT :)

doforumda and ¤ Dii ¤, my congratulations, we did it.

[Dii]

lyuts: I think that's the best solution, if he is changing the socket parameter of mysql probably he will screw up some other components in his LAMPP configuration. I don't recommend that.

[lyuts]

I don't know what's going on within LAMPP and you might be right. It's just creating this symlink looks more like a workaround.

[doforumda]

[quote author="lyuts" date="1286886793"]I think our solution is rough enough, but at least it works. I think the best solution is to set the socket parameter in my.cnf to /var/run/mysqld/mysqld.sock. But it is up to you doforumda.

bq. millions of thanks to both of you TYUT and Dii.

Hey, I'm lyuts, not TYUT :)

doforumda and ¤ Dii ¤, my congratulations, we did it.[/quote]

sorry I wrote your name wrong

[Guest]

with 131 replies, I think this must be the longest threaded discussion in devnet forum so far !!!
congrats to you guys for sticking till the end and solving it :)