CREATE SEQUENCE IF NOT EXISTS alerts_id_seq START WITH 1;
ALTER TABLE alerts ALTER COLUMN id SET DATA TYPE INTEGER USING (nextval('alerts_id_seq'));
ALTER TABLE alerts ALTER COLUMN id ADD GENERATED ALWAYS AS IDENTITY;
DROP SEQUENCE IF EXISTS alerts_id_seq;

CREATE SEQUENCE IF NOT EXISTS talkgroups_learned_id_seq START WITH 1;
ALTER TABLE talkgroups_learned ALTER COLUMN id SET DATA TYPE INTEGER USING (nextval('talkgroups_learned_id_seq'));
ALTER TABLE talkgroups_learned ALTER COLUMN id ADD GENERATED ALWAYS AS IDENTITY;
DROP SEQUENCE IF EXISTS talkgroup_learned_id_seq;

DROP TRIGGER IF EXISTS learn_tg ON calls;
DROP FUNCTION IF EXISTS learn_talkgroup();

ALTER TABLE talkgroups ADD COLUMN IF NOT EXISTS learned BOOLEAN NOT NULL DEFAULT FALSE;

CREATE SEQUENCE IF NOT EXISTS talkgroups_id_seq START WITH 1;
ALTER TABLE talkgroups ALTER COLUMN id SET DATA TYPE INTEGER USING (nextval('talkgroups_id_seq'));
ALTER TABLE talkgroups ALTER COLUMN id ADD GENERATED ALWAYS AS IDENTITY;
DROP SEQUENCE IF EXISTS talkgroups_id_seq;

ALTER TABLE calls ADD CONSTRAINT calls_talkgroup_id_fkey FOREIGN KEY (system, talkgroup_id) REFERENCES talkgroups(system_id, tgid);