strongduanmu commented on issue #22576:
URL:
https://github.com/apache/shardingsphere/issues/22576#issuecomment-1340843258
Following is the latest result.
```sql
sharding_db=> (select * from t_order where order_id = 1500 union select *
from t_order where order_id = 1800 )INTERSECT select * from t_order where
status ='finish' order by order_id;
order_id | user_id | status | merchant_id | remark | creation_date
----------+---------+--------+-------------+--------+---------------
1800 | 18 | finish | 13 | test | 2017-08-18
(1 row)
sharding_db=> select * from t_order where order_id = 1500 union (select *
from t_order where order_id = 1800 INTERSECT select * from t_order where
status ='finish' order by order_id); --incorrect
order_id | user_id | status | merchant_id | remark | creation_date
----------+---------+--------+-------------+--------+---------------
1800 | 18 | finish | 13 | test | 2017-08-18
1500 | 15 | init | 1 | | 2017-08-28
(2 rows)
sharding_db=> select * from t_order where order_id = 1500 union select *
from t_order where order_id = 1800 INTERSECT select * from t_order where
status ='finish' order by order_id; --incorrect
order_id | user_id | status | merchant_id | remark | creation_date
----------+---------+--------+-------------+--------+---------------
1500 | 15 | init | 1 | | 2017-08-28
1800 | 18 | finish | 13 | test | 2017-08-18
(2 rows)
```
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