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https://issues.apache.org/jira/browse/SPARK-14098?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15517209#comment-15517209
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Apache Spark commented on SPARK-14098:
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User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/15219
> Generate code that get a float/double value in each column from CachedBatch
> when DataFrame.cache() is called
> ------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-14098
> URL: https://issues.apache.org/jira/browse/SPARK-14098
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Kazuaki Ishizaki
>
> When DataFrame.cache() is called, data is stored as column-oriented storage
> in CachedBatch. The current Catalyst generates Java program to get a value of
> a column from an InternalRow that is translated from CachedBatch. This issue
> generates Java code to get a value of a column from CachedBatch. While a
> column for a cache may be compressed, this issue handles float and double
> types that are never compressed.
> Other primitive types, whose column may be compressed, will be addressed in
> another entry.
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