Selecting data from mysql using qt?

doforumda

@
opt/lampp/var/mysql/cdcol:
total 20
-rw-rw---- 1 nobody root 8658 2007-03-23 20:54 cds.frm
-rw-rw---- 1 nobody root 172 2009-07-30 11:58 cds.MYD
-rw-rw---- 1 nobody root 2048 2009-07-30 12:29 cds.MYI

opt/lampp/var/mysql/mysql:
total 5324
-rw-rw---- 1 nobody root 8820 2008-12-02 10:52 columns_priv.frm
-rw-rw---- 1 nobody root 23490 2008-12-02 10:52 columns_priv.MYD
-rw-rw---- 1 nobody root 8192 2008-12-02 10:52 columns_priv.MYI
-rw-rw---- 1 nobody root 9582 2008-12-02 10:52 db.frm
-rw-rw---- 1 nobody root 2200 2010-10-11 21:41 db.MYD
-rw-rw---- 1 nobody root 5120 2010-10-11 21:41 db.MYI
-rw-rw---- 1 nobody root 10223 2008-12-02 10:52 event.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 event.MYD
-rw-rw---- 1 nobody root 2048 2008-12-02 10:52 event.MYI
-rw-rw---- 1 nobody root 8665 2008-12-02 10:52 func.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 func.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 func.MYI
-rw-rw---- 1 nobody root 35 2008-12-02 12:19 general_log.CSM
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 general_log.CSV
-rw-rw---- 1 nobody root 8776 2008-12-02 10:52 general_log.frm
-rw-rw---- 1 nobody root 8700 2008-12-02 10:52 help_category.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 help_category.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 help_category.MYI
-rw-rw---- 1 nobody root 8612 2008-12-02 10:52 help_keyword.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 help_keyword.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 help_keyword.MYI
-rw-rw---- 1 nobody root 8630 2008-12-02 10:52 help_relation.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 help_relation.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 help_relation.MYI
-rw-rw---- 1 nobody root 8770 2008-12-02 10:52 help_topic.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 help_topic.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 help_topic.MYI
-rw-rw---- 1 nobody root 9510 2008-12-02 10:52 host.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 host.MYD
-rw-rw---- 1 nobody root 2048 2008-12-02 10:52 host.MYI
-rw-rw---- 1 nobody root 8778 2008-12-02 10:52 ndb_binlog_index.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 ndb_binlog_index.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 ndb_binlog_index.MYI
-rw-rw---- 1 nobody root 8586 2008-12-02 10:52 plugin.frm
-rw-rw---- 1 nobody root 1154 2009-04-10 10:16 plugin.MYD
-rw-rw---- 1 nobody root 2048 2009-04-10 10:16 plugin.MYI
-rw-rw---- 1 nobody root 9996 2008-12-02 10:52 proc.frm
-rw-rw---- 1 nobody root 740 2008-12-02 12:14 proc.MYD
-rw-rw---- 1 nobody root 4096 2008-12-02 12:19 proc.MYI
-rw-rw---- 1 nobody root 8875 2008-12-02 10:52 procs_priv.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 procs_priv.MYD
-rw-rw---- 1 nobody root 4096 2008-12-02 10:52 procs_priv.MYI
-rw-rw---- 1 nobody root 8838 2008-12-02 10:52 servers.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 servers.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 servers.MYI
-rw-rw---- 1 nobody root 35 2008-12-02 12:19 slow_log.CSM
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 slow_log.CSV
-rw-rw---- 1 nobody root 8976 2008-12-02 10:52 slow_log.frm
-rw-rw---- 1 nobody root 8955 2008-12-02 10:52 tables_priv.frm
-rw-rw---- 1 nobody root 3404 2008-12-02 10:52 tables_priv.MYD
-rw-rw---- 1 nobody root 8192 2008-12-02 10:52 tables_priv.MYI
-rw-rw---- 1 nobody root 8636 2007-03-23 20:54 time_zone.frm
-rw-rw---- 1 nobody root 8624 2008-12-02 10:52 time_zone_leap_second.frm
-rw-rw---- 1 nobody root 0 2008-12-02 10:52 time_zone_leap_second.MYD
-rw-rw---- 1 nobody root 1024 2008-12-02 10:52 time_zone_leap_second.MYI
-rw-rw---- 1 nobody root 11795 2008-12-30 14:16 time_zone.MYD
-rw-rw---- 1 nobody root 19456 2008-12-30 14:16 time_zone.MYI
-rw-rw---- 1 nobody root 8606 2008-12-02 10:52 time_zone_name.frm
-rw-rw---- 1 nobody root 331945 2008-12-30 14:16 time_zone_name.MYD
-rw-rw---- 1 nobody root 37888 2008-12-30 14:16 time_zone_name.MYI
-rw-rw---- 1 nobody root 8686 2008-12-30 14:16 time_zone_transition.frm
-rw-rw---- 1 nobody root 1992570 2008-12-30 14:16 time_zone_transition.MYD
-rw-rw---- 1 nobody root 2216960 2008-12-30 14:16 time_zone_transition.MYI
-rw-rw---- 1 nobody root 8748 2008-12-30 14:16 time_zone_transition_type.frm
-rw-rw---- 1 nobody root 293208 2008-12-30 14:16 time_zone_transition_type.MYD
-rw-rw---- 1 nobody root 112640 2008-12-30 14:16 time_zone_transition_type.MYI
-rw-rw---- 1 nobody root 10466 2008-12-02 10:52 user.frm
-rw-rw---- 1 nobody root 388 2010-10-11 21:41 user.MYD
-rw-rw---- 1 nobody root 2048 2010-10-11 21:41 user.MYI

@

lyuts

I bet it is here @/opt/lampp/mysql/my.cnf@

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.