Example appinfo for `CRM_PRZYPADEK`.`FORM_TREAT` field defined as set('', 'R', 'W', 'X', 'C', 'S', 'O', 'V', 'E'): SELECT ID, `FORM_TREAT`, CAST(`FORM_TREAT` AS UNSIGNED) FROM `CRM_PRZYPADEK`; IF 8 == 'X' THEN insert into `CRM_PRZYPADEK`(`FORM_TREAT`) values('X'); IS EQUAL TO insert into `CRM_PRZYPADEK`(`FORM_TREAT`) values(8);