-- [PIPES]

create type pipes_status as enum ('open', 'closed', 'cv');

create table pipes
(
  id varchar(32) primary key references _link(id)
, node1 varchar(32) references _node(id) not null
, node2 varchar(32) references _node(id) not null
, length numeric not null
, diameter numeric not null
, roughness numeric not null
, minor_loss numeric not null
, status pipes_status not null
);