anchor.diff:  
   -include("epgsql.hrl").
   
  --type query() :: string() | iodata().
  +-type sql_query() :: string() | iodata().
   -type host() :: inet:ip_address() | inet:hostname().
   -type connection() :: pid().
   -type connect_option() ::
  
positive.code: get_parameter(C, Name) ->
      epgsql_sock:get_parameter(C, Name).
  
  -spec squery(connection(), query()) -> reply(squery_row()) | [reply(squery_row())].
  %% @doc runs simple `SqlQuery' via given `Connection'
  squery(Connection, SqlQuery) ->
      gen_server:call(Connection, {squery, SqlQuery}, infinity).
  
negative.code:             Error
      end.
  
  -spec equery(connection(), string(), sql_query(), [bind_param()]) -> reply(equery_row()).
  equery(C, Name, Sql, Parameters) ->
      case parse(C, Name, Sql, []) of
          {ok, #statement{types = Types} = S} ->
  