ALTER TABLE variable DROP PRIMARY KEY;
ALTER TABLE variable ADD id bigint(20) UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY FIRST;
ALTER TABLE variable ADD strata enum('DEFAULT','GLOBAL','FQDN', 'FQDN_CREATOR', 'CREATOR', 'MEMBER', 'DOMAIN') NOT NULL DEFAULT 'DEFAULT';
ALTER TABLE variable ADD strata_id bigint DEFAULT NULL;
ALTER TABLE variable ADD UNIQUE (name, strata, strata_id);