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Posted to issues@arrow.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/07/03 07:46:00 UTC

[jira] [Updated] (ARROW-5821) [Java] Support compact fixed-width vectors

     [ https://issues.apache.org/jira/browse/ARROW-5821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-5821:
----------------------------------
    Labels: pull-request-available  (was: )

> [Java] Support compact fixed-width vectors
> ------------------------------------------
>
>                 Key: ARROW-5821
>                 URL: https://issues.apache.org/jira/browse/ARROW-5821
>             Project: Apache Arrow
>          Issue Type: New Feature
>            Reporter: Ji Liu
>            Assignee: Ji Liu
>            Priority: Minor
>              Labels: pull-request-available
>
> In shuffle stage of some applications, FixedWitdhVectors may have very little non-null data.
> In this case, directly serialize vectors is not a good choice, generally we can compact the vector make it only holding non-null value and create a BitVector to trace the indices for non-null values so that it could be deserialized properly.



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