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https://issues.apache.org/jira/browse/SPARK-15701?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang-Chi Hsieh closed SPARK-15701.
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Resolution: Not A Problem
> Constant ColumnVector only needs to prepare one capacity
> --------------------------------------------------------
>
> Key: SPARK-15701
> URL: https://issues.apache.org/jira/browse/SPARK-15701
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
>
> ColumnVector has a variable to mark it is a constant ColumnVector or not.
> However, we still let constant ColumnVector prepate the space needed for all
> its capacity. Actually because constant ColumnVector only has one distinct
> value. It only needs to prepare one capacity. This can reduce its memory
> usage and speed up data access.
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