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Posted to issues@orc.apache.org by "Deshan Xiao (Jira)" <ji...@apache.org> on 2024/04/10 10:37:00 UTC

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

    [ https://issues.apache.org/jira/browse/ORC-642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17835684#comment-17835684 ] 

Deshan Xiao commented on ORC-642:
---------------------------------

Issue resolved by pull request 1868
https://github.com/apache/orc/pull/1868

> 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
>            Priority: Minor
>
> 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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