RaigorJiang opened a new issue, #28726:
URL: https://github.com/apache/shardingsphere/issues/28726
## Bug Report
### Which version of ShardingSphere did you use?
master d55fe465dfe7d27d78aad06e1cbfdc96544f8816
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
Alter storage unit successful
### Actual behavior
Alter is rejected when multiple storage units are on the same MySQL instance.
To be more precise, `ds_0` can be altered, but `ds_1` cannot.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```sql
REGISTER STORAGE UNIT ds_0 (
URL="jdbc:mysql://127.0.0.1:3306/demo_ds_0?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true",
USER="root",
PASSWORD="123456",
PROPERTIES("maximumPoolSize"=10)
);
REGISTER STORAGE UNIT ds_1 (
URL="jdbc:mysql://127.0.0.1:3306/demo_ds_1?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true",
USER="root",
PASSWORD="123456",
PROPERTIES("maximumPoolSize"=10)
);
ALTER STORAGE UNIT ds_1 (
URL="jdbc:mysql://127.0.0.1:3306/demo_ds_1?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true",
USER="root",
PASSWORD="123456",
PROPERTIES("maximumPoolSize"=20)
);
```
<img width="984" alt="image"
src="https://github.com/apache/shardingsphere/assets/5668787/d471e7e9-d855-4f05-aabd-17ec24ff84bb";>
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