ALTER TABLE vn.ticket DROP COLUMN IF EXISTS problem;
ALTER TABLE vn.sale DROP COLUMN IF EXISTS problem;
ALTER TABLE vn.ticket DROP COLUMN IF EXISTS risk;

ALTER TABLE vn.ticket ADD IF NOT EXISTS problem SET('hasTicketRequest', 'isFreezed', 'hasRisk', 'hasHighRisk', 'isTaxDataChecked', 'isTooLittle')NOT NULL DEFAULT '';
ALTER TABLE vn.sale ADD IF NOT EXISTS problem SET('hasItemShortage', 'hasComponentLack', 'hasItemDelay', 'hasRounding', 'hasItemLost')NOT NULL DEFAULT '';
ALTER TABLE vn.ticket ADD IF NOT EXISTS risk DECIMAL(10,2) DEFAULT NULL NULL COMMENT 'cache calculada con el riesgo del cliente';