kimmking edited a comment on issue #4861: two tables left join with different routing rules are not supported URL: https://github.com/apache/incubator-shardingsphere/issues/4861#issuecomment-604803764 ShardingSphere can support literal sharding-key conditions explicitly. Implicit semantic conditions are not in our current scope (other query optimizations too). So we can discuss about how to go further for it. And if you are insterested in this topic, making an investigation and some proposals here is welcome. In your case above, my suggestion is to modify your sql: 1. Use sharding-key literally with `... b.col = 123` 2. Or split two sql, query from a with 123, and then query from b with sharding-key
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