wangleigithub commented on issue #8517:
URL: https://github.com/apache/shardingsphere/issues/8517#issuecomment-741643665


   > Hi @wangleigithub
   > 
   > Could you set `max-connections-size-per-query = N +1`?
   > N = the count of sharding tables in one database instance
   > 
   > That way, we can parallelize the queries and handle the results by 
streaming merging.
   
   OK, it worked. But take long time , any suggest?


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