userkdg commented on issue #13940:
URL:
https://github.com/apache/shardingsphere/issues/13940#issuecomment-987609469
> @userkdg This is the result of my test, and no exception was found.
>
> ```
> [INFO ] 2021-12-07 09:17:23.323 [Connection-1-ThreadExecutor]
ShardingSphere-SQL - Logic SQL: select count(0) as cnt from (select order_id
from t_encrypt) as tmp
> [INFO ] 2021-12-07 09:17:23.324 [Connection-1-ThreadExecutor]
ShardingSphere-SQL - SQLStatement: MySQLSelectStatement(limit=Optional.empty,
lock=Optional.empty, window=Optional.empty)
> [INFO ] 2021-12-07 09:17:23.324 [Connection-1-ThreadExecutor]
ShardingSphere-SQL - Actual SQL: ds_1 ::: select count(0) as cnt from (select
order_cipher AS order_id from t_encrypt) as tmp
> ```
bad!! subquery table set alias , proxy rewrite sql error . such as :
actual
``` sql
MySQL [ec_order_db]> preview select count(1) as cnt from (select a.address
from ec_oms_order a) as tmp;
+------------------+-----------------------------------------------------------------------------------------------+
| data_source_name | sql
|
+------------------+-----------------------------------------------------------------------------------------------+
| ec_order_ds | select count(1) as cnt from (select a.a.address_cipher
AS address from ec_oms_order a) as tmp |
+------------------+-----------------------------------------------------------------------------------------------+
```
Expected
``` sql
select count(1) as cnt from (select a.address_cipher AS address from
ec_oms_order a) as tmp
```
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