die"There are no dependent columns to update, as everything seems to belong to the primary key";
}
my$sql="UPDATE $table_name SET ".join(', ',map{"$columns_to_update->[$_]=$values_to_update->[$_]"}(0..@$columns_to_update-1))." WHERE $primary_key_constraint";
my$sth=$self->prepare($sql);
$sth->execute();
$sth->finish();
}
sub check_object_present_in_db{# return autoinc_id/undef if the table has autoinc_id or just 1/undef if not