alter table pay_config
    modify wx_api_version varchar(255) default 'v3' null comment 'v2,v3,wf';

alter table pay_config
    add zfb_api_version varchar(255) default 'v1' null comment 'v1,wf' after zfb_app_id;

alter table pay_merchant
    add zfb_merchant_id varchar(255) null comment '支付宝商户id' after status;