cgivre commented on issue #2873:
URL: https://github.com/apache/drill/issues/2873#issuecomment-1905132740

   I'm not yet convinced there is a bug in Drill here.  I think the issue may 
actually be in your query.  My hunch here is that there may be an issue in the 
`ORDER BY` statement.  Your inner tables each have columns called `k1`.  Then 
you are calling a sort on that without specifying which one it is.  You might 
first try adding table names to the `ORDER BY` clause.
   
   Secondly, I'm not trying to be rude but what are you trying to achieve with 
this query?   It looks like you are performing a union of a left and right join 
of the same table?  Why not combine these?    Then you have nested `SELECT *` 
statements that don't really seem to serve any purpose. 


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