服务单号	订单编号	商品名称	退款申请时间	退款状态	退款金额	操作

Database error: 无效的查询语句: SELECT * FROM wl_returngoods WHERE 1 and repairType=1 and userid= and username=''
MySQL Error: 1064 (You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'and username=''' at line 1)
Session halted.