mistercrunch commented on issue #12028:
URL: 
https://github.com/apache/incubator-superset/issues/12028#issuecomment-744101012


   Also, we really should NOT have an `ORDER BY` clause when getting samples. 
The cost of getting at top `1000` is generally very cheap, even on a super 
large table, but adding an order by can make things much more expensive as it 
forces a full can + ordering.


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