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Posted to dev@orc.apache.org by "Devavret Makkar (Jira)" <ji...@apache.org> on 2020/06/16 00:48:00 UTC

[jira] [Created] (ORC-642) ORC specification for RLEv2 is incomplete

Devavret Makkar created ORC-642:
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             Summary: ORC specification for RLEv2 is incomplete
                 Key: ORC-642
                 URL: https://issues.apache.org/jira/browse/ORC-642
             Project: ORC
          Issue Type: Bug
            Reporter: Devavret Makkar


The documentation at [https://orc.apache.org/specification/ORCv1/] fails to mention that in RLEv2 patched base mode, the bit width of PW + PGW is to be ceiled to the nearest fixed bit size. The values in the fixed bit size set appear to be from the table here [https://github.com/apache/orc/blob/9c65bc116a2208d5d729687b7744b2ffbd72fea0/c%2B%2B/src/RLEV2Util.cc#L30-L37] which does not exactly match the values in the 5 bit width encoding table as the latter lacks support for sizes 22 and 23.



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