module Extern : sig
  type t = {
    intern_key : ImportDataTypes.Path.t ImportExpression.T.t;
    target : ImportDataTypes.Table.t;
    extern_key : ImportDataTypes.Path.column ImportExpression.T.t;
    allow_missing : bool;
    match_rule : string option;
  }
  [@@deriving show, eq]
end

module CTE = Cte

type t = {
  version : int;
  locale : string option;
  source : ImportDataTypes.Table.t;
  externals : Extern.t list;
  columns : ImportDataTypes.Path.t ImportExpression.T.t list;
  filters : ImportDataTypes.Path.t ImportExpression.T.t list;
  sort : ImportDataTypes.Path.t ImportExpression.T.t list;
  uniq : ImportDataTypes.Path.t ImportExpression.T.t list;
}

val repr : t -> Otoml.t

val root_table : t -> ImportDataTypes.Table.t
(** Get the root table, this table is the main table to load and each line in
    this table will be processed *)

val get_table_for_name : t -> string option -> ImportDataTypes.Table.t

val get_dependancies_for_table : t -> ImportDataTypes.Table.t -> Extern.t list
(** Get all the externals refered by the source *)

val dummy_conf : t
val latest_version : int