Handle user defined types

[ludusrusso]

I'd like to use sqlc with user defined types in Postgres.

For instance, if I provide a schema like this:

CREATE TYPE FOO as (
  foo text
);

CREATE TABLE authors (
  id   BIGSERIAL PRIMARY KEY,
  name text      NOT NULL,
  bio  text,
  foo FOO
);

I'd expect an output model like that

type Foo struct {
  foo sql.NullString
}

type Author struct {
   ID   int64
   Name string
   Bio  sql.NullString
   Foo  *Foo
}​

Do you think this is feasible?

If for you this is ok I can try to do a PR on it!

[kyleconroy]

@ludusrusso No current plans to support user defined types. I'd love to, but there's a lot of other lower hanging fruit that needs to be worked on first.

[kyleconroy]

Tracking via #2760