A native Postgres driver for OCaml 5 and Eio.

Written for Eio in OCaml, the protocol spoken without libpq.

opam repo add hypha https://github.com/hyphatech/opam-repository.git
opam install postgres-eio

Get started Reference

let () =
  Eio_main.run @@ fun env ->
  Eio.Switch.run @@ fun sw ->
  match Postgres_eio.Conninfo.of_string "postgres://app@localhost/shop" with
  | Error e -> prerr_endline e
  | Ok conninfo -> (
      match
        Postgres_eio.connect ~sw ~net:(Eio.Stdenv.net env)
          ~mono_clock:(Eio.Stdenv.mono_clock env)
          conninfo
      with
      | Error e -> prerr_endline (Postgres_eio.error_to_string e)
      | Ok conn ->
          (match
             Postgres_eio.query conn
               "select name from customers where country = $1"
               ~params:[ Some "GB" ] ~init:[] ~row:(fun names row ->
                 match row with [| Some name |] -> name :: names | _ -> names)
           with
          | Ok (names, _tag) -> List.iter print_endline names
          | Error e -> prerr_endline (Postgres_eio.error_to_string e));
          Postgres_eio.close conn)