zhfeng commented on issue #18636:
URL: 
https://github.com/apache/shardingsphere/issues/18636#issuecomment-1168546121

   Yeah, I understand and `XA protocol in SQL layer` was introudced by 
https://github.com/apache/shardingsphere/pull/14075. But I think we still need 
to handle `XAStatement` in `sharding-proxy` especially in the case of crash 
recovery happening in the multi backend databases. I think we don't have any 
test case for this scenario currently.
   
   Anyway my +1 for improving the implementation of `TransactionXAHandler` but 
no just deleting it.


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