DROP TABLE IF EXISTS region_to_region_group;

-- DROP SEQUENCE IF EXISTS region_to_region_group_region_to_region_group_id_seq;
-- CREATE SEQUENCE region_to_region_group_region_to_region_group_id_seq;

CREATE TABLE region_to_region_group (
  "region_to_region_group_id" int PRIMARY KEY GENERATED BY DEFAULT AS IDENTITY, -- SERIAL PRIMARY KEY
  "country_id" int check ("country_id" > 0) NOT NULL,
  "region_id" int check ("region_id" >= 0) NOT NULL DEFAULT 0,
  "region_group_id" int check ("region_group_id" > 0) NOT NULL,
  "created_at" timestamp(0) NOT NULL DEFAULT now()
  -- PRIMARY KEY("region_to_region_group_id")
);

CREATE INDEX "region_to_region_group_country_id" ON region_to_region_group ("country_id");
CREATE INDEX "region_to_region_group_region_id" ON region_to_region_group ("region_id");
CREATE INDEX "region_to_region_group_region_group_id" ON region_to_region_group ("region_group_id");
SELECT setval('region_to_region_group_region_to_region_group_id_seq', 108, true); -- last inserted id by sample data
