create type scada_type as enum ('PRESSURE', 'DEMAND', 'QUALITY', 'LEVEL', 'FLOW');

create table scada_model
(
  id text primary key
, x numeric not null
, y numeric not null
, device_id text not null unique
, device_name text
, address text
, type scada_type
, model_id varchar(32) -- add constraint in API
);