ALTER TABLE tb_iot_card_import_task ADD COLUMN IF NOT EXISTS carrier_type VARCHAR(20) NOT NULL DEFAULT 'CMCC';
ALTER TABLE tb_iot_card_import_task ADD COLUMN IF NOT EXISTS iccid_list JSONB DEFAULT '[]';

COMMENT ON COLUMN tb_iot_card_import_task.carrier_type IS '运营商类型(CMCC/CUCC/CTCC/CBN)';
COMMENT ON COLUMN tb_iot_card_import_task.iccid_list IS '待导入ICCID列表';
