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https://issues.apache.org/jira/browse/KUDU-2852?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16942365#comment-16942365
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Andrew Wong commented on KUDU-2852:
-----------------------------------
[~abukor] Are you working on this? I'd like to hand it off to [~bankim], if you
don't mind.
> Push predicate evaluation into more CFile decoders
> --------------------------------------------------
>
> Key: KUDU-2852
> URL: https://issues.apache.org/jira/browse/KUDU-2852
> Project: Kudu
> Issue Type: Improvement
> Components: cfile, perf
> Reporter: Andrew Wong
> Assignee: Attila Bukor
> Priority: Major
> Labels: newbie
>
> Commit c0f3727 added an optimization to push predicate evaluation into the
> CFile decoders without fully materializing the contents of each cblock. It
> did this with dictionary-encoded blocks, but the optimization can be applied
> to any other encoding types too.
> A low hanging fruit is RLE decoders, which should be able to evaluate the
> predicate for each run instead of materializing each cell and then applying
> the predicate.
> KUDU-736 also notes that we may be able to apply some predicates on
> bitshuffled data.
>
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