Check out DBIx::Class::Schema::Loader.

There is a method in there called make_schema_at that you can use to generate the full column definitions for your schema.

Here is some example code:

perl -MDBIx::Class::Schema::Loader=make_schema_at,dump_to_dir:./lib -e
+ 
              'make_schema_at("My::Schema", { debug => 1, db_schema =>
+ 
              "myschemaname", use_namespaces => 1, components => 
              ["InflateColumn::DateTime"] }, 
              ["dbi:Pg:host=localhost;dbname=mydbname", "user", "pass"
+ ])'
[download]

Hope this helps.