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https://issues.apache.org/jira/browse/SPARK-12907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kazuaki Ishizaki closed SPARK-12907.
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Resolution: Won't Fix
> Use BitSet to represent null fields in ColumnVector
> ---------------------------------------------------
>
> Key: SPARK-12907
> URL: https://issues.apache.org/jira/browse/SPARK-12907
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.0.0
> Reporter: Kazuaki Ishizaki
> Priority: Minor
>
> Use bit vectors (BitSet) to represent null fields information in ColumnVector
> to reduce memory footprint.
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