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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ORC-275) Add ability to use SARG for nested columns
Date Wed, 06 Dec 2017 18:38:00 GMT
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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