qiuweilu commented on issue #28872:
URL: 
https://github.com/apache/shardingsphere/issues/28872#issuecomment-1784369529

   @RaigorJiang 
   
   When dealing with complex queries, especially in nested scenarios, if the 
partition key is specified and cannot execute accurately, it will result in 
executing M * N queries.
   
   
   https://github.com/apache/shardingsphere/issues/28397


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