$ perl tester.pl
Trying HandleError (with RaiseError on):
        Sub 'handle_error':
        End sub
DBD::mysql::db selectall_hashref failed: Unknown column 'wrong_col' in 'field list' at tester.pl line 11.
Trying RaiseError and eval:
DBD::mysql::db selectall_hashref failed: Unknown column 'wrong_col' in 'field list' at tester.pl line 16.
Trying Errstr:
DBD::mysql::st execute failed: Unknown column 'wrong_col' in 'field list' at tester.pl line 26.
        Errstr: Unknown column 'wrong_col' in 'field list'

- or - when redirecting STDERR:
$ perl tester.pl 2>/dev/null
Trying HandleError (with RaiseError on):
        Sub 'handle_error':
        End sub
Trying RaiseError and eval:
Trying Errstr:
        Errstr: Unknown column 'wrong_col' in 'field list'