ALTER TABLE que_jobs
DROP CONSTRAINT que_jobs_pkey, DROP COLUMN queue, ALTER COLUMN priority TYPE integer, ADD CONSTRAINT que_jobs_pkey PRIMARY KEY (priority, run_at, job_id);
ALTER TABLE que_jobs
DROP CONSTRAINT que_jobs_pkey, DROP COLUMN queue, ALTER COLUMN priority TYPE integer, ADD CONSTRAINT que_jobs_pkey PRIMARY KEY (priority, run_at, job_id);