codefairy08 commented on issue #2263: Must have sharding column with subquery error occurred when use “exists”. URL: https://github.com/apache/incubator-shardingsphere/issues/2263#issuecomment-486958327 @AlbertTao Sharding column is in subquery, outer select may route all sharding datasource, It is very dangerous under the big data volume。 What are the performance differences between the two versions?
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