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-487492136 @AlbertTao the Select with subquery is executed successfully with sharding condition which is routed one sharding node。This restriction was added to after 3.0.1 version。 The reason is： 1 there are more sharding tables in subquery，the execution result may be wrong。 2 there is a lot of data in the table, the execution time will be very long.
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