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Posted to dev@orc.apache.org by "Owen O'Malley (JIRA)" <ji...@apache.org> on 2017/12/06 18:38:00 UTC

[jira] [Created] (ORC-275) Add ability to use SARG for nested columns

Owen O'Malley created ORC-275:
---------------------------------

             Summary: Add ability to use SARG for nested columns
                 Key: ORC-275
                 URL: https://issues.apache.org/jira/browse/ORC-275
             Project: ORC
          Issue Type: Bug
            Reporter: Owen O'Malley


It would be great to be able to use SARG to prune based on nested columns. I'd suggest:

* Adding TypeDescription.findSubtype(String) that looks up a field by name. We can create virtual field names for list, map, and union types.
* Switch the SARG evaluation to use TypeDescription.findSubtype to find the relevant column.





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