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my $ins_rec = "INSERT INTO $tbl_name (col1, col2, col3, col4, col5, co
+l6, col7) VALUES (?,?,?,?,?,?,?);";

...
$sth=$dbh->prepare($ins_rec) or die $dbh->errstr;

$sth->execute($col1, $col2, $col3, $col4, $col5, $col6, $col7) or die 
+$sth->errstr;

col7 ENUM('N','Y') NOT NULL DEFAULT 'N'

Global symbol "$col7" requires explicit package name at test.pl line 9
+6.
Execution of test.pl aborted due to compilation errors.