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CREATE TABLE rht.model_mod
(
  mod_id serial NOT NULL,
  mod_name character varying(30) NOT NULL,
  mod_date date,
  mod_description text NOT NULL,
  mod_location character varying(25), -- Geographical area to which the model is applied, should be consistent with europe.wso
  mod_formula text,
  CONSTRAINT model_mod_pkey PRIMARY KEY (mod_id),
  CONSTRAINT model_mod_mod_name_key UNIQUE (mod_name)
);

DROP TABLE IF EXISTS rht.resultmodel;
CREATE TABLE rht.resultmodel
(
  res_id serial NOT NULL,
  res_id_drain integer,
  res_value double precision,
  res_mod_id integer,
  CONSTRAINT resultmodel_pkey PRIMARY KEY (res_id),
  CONSTRAINT c_fk_res_mod_id FOREIGN KEY (res_mod_id)
      REFERENCES rht.model_mod (mod_id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE NO ACTION
);