postgres_async is an ocaml PostgreSQL client that implements the PostgreSQL protocol
rather than binding to the libpq C library. It provides support for regular queries
(including support for 'parameters': SELECT * WHERE a = $1) and COPY IN mode. The
interface presented is minimal to keep the library simple for now, though in the future
a layer on top may add convenience functions.
To get started, have a look at the Postgres_async module interface in
src/postgresql_async.mli.