自增ID问题

插入

    @Override
    @Transactional(rollbackFor = Exception.class)
    public Long add(GovDingUserDO entity) {
        entity.setId(snowBeanConfig.getIdWorker().nextId());
        govDingUserMapper.insertSelective(entity);
        return entity.getId();
    }

采用的雪花ID作为主键，成功返回ID，即雪花ID

mapper

<insert id="insertSelective" parameterType="com.jandar.sso.pojo.GovDingUserDO" >
    <selectKey keyProperty="id" order="AFTER" resultType="java.lang.Long">
      select LAST_INSERT_ID()
    </selectKey>
    insert into t_gov_ding_user
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
      ......

问题：插入成功返回的不是雪花ID，而是表自增主键的值

原因：

<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Long">
      select LAST_INSERT_ID()
    </selectKey>

扩展： return entity.getId();获取到的id到底是取的哪个？原理是什么？