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https://issues.apache.org/jira/browse/HIVE-15788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941945#comment-15941945
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Pengcheng Xiong commented on HIVE-15788:
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I am deferring this to Hive 3.0 as we are going to cut the first RC and it is
not marked as blocker. Please feel free to commit to the branch if this can be
resolved before the release.
> Implement FastBloomFilter to use RoaringBitmap instead of long[]
> -----------------------------------------------------------------
>
> Key: HIVE-15788
> URL: https://issues.apache.org/jira/browse/HIVE-15788
> Project: Hive
> Issue Type: Improvement
> Components: UDF
> Reporter: Gopal V
>
> Currently, a bloom filter which is all 1s occupies the exact amount of space
> as a bloom filter which is sparse.
> This is an entire waste of space and produces memory pressure and generate a
> massive number of cache misses.
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