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MySQL is really poor in is support for AUDITING.

There will be some new feature in 5.5 or later, in which we will see the AUDIT interface finally implemented.

But ... who knows what will really happen, and who know if it will work or not.

So in the meantime, if you want to have some information printed out (at least), you can use this simple pathc.

What you need to do is modifying the file mysqld.cc in the sql directory.

in:> sql/mysqld.cc
Look for the function : int my_message_sql(uint error, const char *str, myf MyFlags)

change the code in the function with the one here, but also check that it is not inserting new bugs ;-).

int my_message_sql(uint error, const char *str, myf MyFlags)
{
THD *thd;
DBUG_ENTER("my_message_sql");
DBUG_PRINT("error", ("error: %u  message: '%s'", error, str));

DBUG_ASSERT(str != NULL);
/*
Code added for writing access denied
*/
if ((global_system_variables.log_warnings > 1) &&
(error == ER_DBACCESS_DENIED_ERROR ||
error == ER_ACCESS_DENIED_ERROR ||
error == ER_TABLEACCESS_DENIED_ERROR ||
error == ER_COLUMNACCESS_DENIED_ERROR ||
error == ER_SPECIFIC_ACCESS_DENIED_ERROR ||
error == ER_PROCACCESS_DENIED_ERROR))
{ // then this is an access-denied error, log it
sql_print_warning(str);
}

Recompile and test it just trying to accessing something with a user that DO NOT have th permission to do it.

You will see the Alert in the log!

So simple so coool