kimmking edited a comment on issue #5274:
URL: https://github.com/apache/shardingsphere/issues/5274#issuecomment-618334523
I try this case with two datasource, it work well in version 4.0.1.
```
mysql> use sharding_db
Database changed
mysql> show tables;
+---------------------+
| Tables_in_demo_ds_0 |
+---------------------+
| t_order |
| t_order_item |
+---------------------+
2 rows in set (0.06 sec)
mysql> show columns from t_order;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| order_id | bigint(20) | NO | PRI | NULL | |
| user_id | int(11) | NO | | NULL | |
| status | varchar(50) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
3 rows in set (0.02 sec)
mysql> alter table t_order add column zz varchar(64);
Query OK, 0 rows affected (1.61 sec)
mysql> show columns from t_order;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| order_id | bigint(20) | NO | PRI | NULL | |
| user_id | int(11) | NO | | NULL | |
| status | varchar(50) | YES | | NULL | |
| zz | varchar(64) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
```
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