Disable EXPLAIN for Specific Queries

It is possible under certain circumstances to modify table data using EXPLAIN SELECT. This can occur if the outer query accesses any tables and an inner query invokes a stored function that changes one or more rows of a table (see http://dev.mysql.com/doc/refman/5.1/en/unnamed-views.html).

The idea is to introduce user-defined regexp checks which should be used to determine whether or not EXPLAIn should be used.