morningman opened a new issue #5188:
URL: https://github.com/apache/incubator-doris/issues/5188
**Describe the bug**
```
mysql> create table tbl5 (k1 int, v1 varchar(32) max, v2 varchar(32) min)
distributed by hash(k1) buckets 1 properties("replication_num" = "1");
Query OK, 0 rows affected (0.04 sec)
mysql> insert into tbl5 values(1, null, null);
Query OK, 1 row affected (0.05 sec)
{'label':'insert_5546aa85dcd14f74-997b253c2c5a09f6', 'status':'VISIBLE',
'txnId':'400533955'}
mysql> insert into tbl5 values(1, "a", "b");
Query OK, 1 row affected (0.06 sec)
{'label':'insert_3b74d1d635084cf8-bc7ad886b3beff82', 'status':'VISIBLE',
'txnId':'400533956'}
mysql> select max(v1), min(v2) from tbl5;
+-----------+-----------+
| max(`v1`) | min(`v2`) |
+-----------+-----------+
| NULL | NULL |
+-----------+-----------+
```
**Expected behavior**
```
mysql> select max(v1), min(v2) from tbl5;
+-----------+-----------+
| max(`v1`) | min(`v2`) |
+-----------+-----------+
| a | b |
+-----------+-----------+
```
- Version [0.13.12]
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