-- [CONTROLS]

create type controls_1_prep as enum ('above', 'below');

-- LINK  linkID  status  IF NODE   nodeID  ABOVE / BELOW   value
create table controls_1
(
  linkid varchar(32) primary key references _link(id)
, status text not null -- open / closed, a pump speed setting, or a control valve setting
, nodeid varchar(32) references _node(id) not null
, prep controls_1_prep not null
, value numeric not null
);

--  LINK linkID   status   AT TIME  time
create table controls_2
(
  linkid varchar(32) primary key references _link(id)
, status text not null -- open / closed, a pump speed setting, or a control valve setting
, time interval hour
);

--  LINK linkID   status   AT CLOCKTIME clocktime   AM / PM
create table controls_3
(
  linkid varchar(32) primary key references _link(id)
, status text not null -- open / closed, a pump speed setting, or a control valve setting
, clock_time_hour interval hour -- get am/pm from it
, clock_time_min  interval minute
);