MySQL Log of invalid Queries

Question

I AM NOT RUNNING THE COMMANDS FROM PHP!

I have MySQL log_error value set to /var/log/mysql/error.log

However when I connect to a database and run an SQL command,

Answer 1

Basically, there are 2 ways.

1) setup some kind of proxy, which can log error queries. There are a lot of forks of the original mysql proxy (which was mentioned by @Mchl) - https://github.com/search?utf8=%E2%9C%93&q=MySQL+Proxy Also you can find latest version of the original mysql proxy here https://github.com/mysql/mysql-proxy

I dont like this way, because its kind of too complicated for quick debug

2) you can enable general log in mysql (which will log ALL queries). It will create big overhead and doesnt fit production requirements, but its fast and easy way to fix bugs in development environment.

Just login to your mysql and execute SET GLOBAL general_log = 'ON'; SHOW GLOBAL VARIABLES LIKE 'general_log%';

You will see logs location, like +------------------+------------------------+ | Variable_name | Value | +------------------+------------------------+ | general_log | OFF | | general_log_file | /mnt/ssd/mysql/s.log | +------------------+------------------------+

After that execute mysqladmin flush-logs -u root -p

When you will need to stop logs - just execute SET GLOBAL general_log = 'OFF';