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https://issues.apache.org/jira/browse/SPARK-20770?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-20770:
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Assignee: Apache Spark
> Improve ColumnStats
> -------------------
>
> Key: SPARK-20770
> URL: https://issues.apache.org/jira/browse/SPARK-20770
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Kazuaki Ishizaki
> Assignee: Apache Spark
>
> We improve the implementation of {{ColumnStats}} by using the following
> approaches.
> 1. Declare subclasses of {{ColumnStats}} as {{final}}
> 2. Remove unnecessary call of {{row.isNullAt(ordinal)}}
> 3. Remove the dependency on {{GenericInternalRow}}
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