another approach, if checking the logs or working around come out to be too much time consumptive for you, might be found in the show status; query to the database and grepping out the values you're looking for.

use vars 'QUERY_COUNT';
...
my $res = $dbh->selectrow_hashref("show status");
$QUERY_COUNT += ($res->{'Questions'} - $QUERY_COUNT);
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maybe that's a silly suggestion, but there are quite trivial ways of getting metadata from a database.