mycat分库分表报错Sharding column can't be updated

1、报错

org.springframework.jdbc.BadSqlGrammarException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Sharding column can't be updated BILL_LOG->MEMBER_ID
### The error may involve com.online.chat.mapper.BillMapper.updateBill-Inline
### The error occurred while setting parameters
### SQL: update bill_log      SET             member_id=?,       anchor_id=?,      bill_flag=?,       inout_amount=?,       out_trade_no=?,       product_name=?,        product_name=?,        product_type=?,        product_url=?,        status=?            where out_trade_no=?
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Sharding column can't be updated BILL_LOG->MEMBER_ID
; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Sharding column can't be updated BILL_LOG->MEMBER_ID
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:231)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
    at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
    at com.sun.proxy.$Proxy76.update(Unknown Source)
    at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:294)
    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:62)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59)
    at com.sun.proxy.$Proxy79.updateBill(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)

2、解决思路是去掉这个更新的列：