ancientelves commented on issue #4341: shardingsphere 4.0.0 retrive very slow that sql script URL: https://github.com/apache/incubator-shardingsphere/issues/4341#issuecomment-587237800 @kimmking yes,one sql. for sharding:SELECT SUM(size) as size_sum FROM table_test_0 ......table_test_16 for single table:SELECT SUM(size) as size_sum FROM table_test sharding performance is bad than single table total size:1,0000,000
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