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justinh's avatar
justinh
Icon for Advocate IV rankAdvocate IV
4 years ago
Solved

Add Index Column without breaking Query Folding?

Is it possible to add an Index Column without breaking Query Folding?
My data source is SAP HANA. 

Need Help

5 Replies

    • Smauro's avatar
      Smauro
      Icon for Solution Sage rankSolution Sage
      4 years ago

      Just to add an explanation to this, you cannot not break query folding when adding an index, as it does need to go through each row of the table, remember where it has added each index and keep it there.

      • AlexisOlson's avatar
        AlexisOlson
        Icon for Super User rankSuper User
        4 years ago

        Theoretically, couldn't Microsoft translate adding an index into something that does fold into a native query? E.g. something like this pattern:

        SELECT 
  [...]
  ROW_NUMBER(ORDER BY [...]) AS index
FROM [...]

         

        While it's not currently implemented this way, is there anything fundamentally preventing indexing from being folded into a native query?