lwtdev commented on issue #7548:
URL: https://github.com/apache/shardingsphere/issues/7548#issuecomment-696564515
> Hi @lwtdev
> So, if you create a logic table `customer` and execute `select * from
customer where id = 3;`, does everything go well?
>
> Plus, if there is a logic table, do you think the following error will
still happen?
>
> ```sql
> mysql> sctl:explain select * from customer where id = 3;
> ERROR 10002 (C1000): 2Unknown exception: [null]
> ```
Can not create logic table `customer` after proxy started.
```sql
create table customer(id bigint(23) primary key );
ERROR 10002 (C1000): 2Unknown exception: [null]
```
If create physical tables `customer_000{0...3}` before proxy started. It
works well:
```sql
mysql> sctl:explain select * from customer where id = 3;
+-----------------+------------------------------------------+
| datasource_name | sql |
+-----------------+------------------------------------------+
| ds_01 | select * from customer_0003 where id = 3 |
+-----------------+------------------------------------------+
```
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