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Posted to dev@arrow.apache.org by "Ji Liu (JIRA)" <ji...@apache.org> on 2019/07/02 08:37:00 UTC

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

Ji Liu created ARROW-5821:
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             Summary: [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


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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