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https://issues.apache.org/jira/browse/SPARK-15950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kazuaki Ishizaki resolved SPARK-15950.
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Resolution: Duplicate
> Eliminate unreachable code at projection for complex types
> ----------------------------------------------------------
>
> Key: SPARK-15950
> URL: https://issues.apache.org/jira/browse/SPARK-15950
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Kazuaki Ishizaki
>
> When we run a spark program with a projection for a complex type, some
> unreachable code blocks are generated. It would be good to eliminate them to
> reduce the total size of Java byte code in a method generated by whole stage
> codegen.
> {code}
> val df = sparkContext.parallelize(Seq(1, 2), 1).toDF("v")
> df.selectExpr("Array(v + 2, v + 3)").collect
> {code}
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