yesidu opened a new issue #4680: count(distinct col) renturn null URL: https://github.com/apache/incubator-shardingsphere/issues/4680 mybatis：int getMsgDay(@Param("account_uid") String account_uid); SQL：SELECT COUNT(DISTINCT DATE_FORMAT(create_time,'%Y%m%d')) as count FROM table_name WHERE account_uid = #{account_uid} if there is no data, then return null, it case an exection: org.apache.ibatis.binding.BindingException: Mapper method 'com.*.getMsgDay attempted to return null from a method with a primitive return type (int).
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