new member so if i posted this twice, i apologize. once you create your sequence & trigger, use the following:

__PACKAGE__->add_columns(
   "id",
   {
    data_type => "NUMBER",
    default_value => undef,
    is_nullable => 0,
    size => 126,
    sequence => "seq_application_id",
    auto_nextval => 1
   }
);
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