Kazuaki Ishizaki created SPARK-20770:
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Summary: 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
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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