原因

之前的MySQL5.6升级到MySQL5.7后,执行查询语句的时候，报错，如下：

getDefContactByUserId exception: Expression #4 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'coolcloud.fpci.value' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

登录到mysql查询一下sql_mode,如下：

mysql> select @@sql_mode;
+------------------------------------------------+
| @@sql_mode |
+------------------------------------------------+
| ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+------------------------------------------------+

原因就是默认设置了

sql_mode=only_full_group_by

only_full_group_by ：使用这个就是使用和oracle一样的group 规则, select的列都要在group中,或者本身是聚合列(SUM,AVG,MAX,MIN) 才行，其实这个配置目前个人感觉和distinct差不多的，所以去掉就好

解决

mysql配置文件中加入如下配置：

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

重启mysql后，再看看

mysql> select @@sql_mode;
+---------------------------------------------+
| @@sql_mode |
+---------------------------------------------+
| STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+---------------------------------------------+
1 row in set (0.00 sec)

问题解决