jingshanglu commented on pull request #14130:
URL: https://github.com/apache/shardingsphere/pull/14130#issuecomment-997727332


   > Shall we add a variable in init progress to indicate no multi datasource 
configured , and check this variable when `xa start` ? Can we change datasource 
on fly using `distSQL` ? Or can we document this feature limitation, and leave 
it to user? I don't think this check is not that reliable.
   
   @roodkcab Ok, now, when `distSQL` change datasource , metadata may be 
inconsistent.Maybe it is better to add `TODO` and document, and then manual 
test the feature, report the test result.


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