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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/06/18 06:24:05 UTC
[jira] [Assigned] (SPARK-16042) Eliminate nullcheck code at
projection for an array type
[ https://issues.apache.org/jira/browse/SPARK-16042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-16042:
------------------------------------
Assignee: Apache Spark
> Eliminate nullcheck code at projection for an array type
> --------------------------------------------------------
>
> Key: SPARK-16042
> URL: https://issues.apache.org/jira/browse/SPARK-16042
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Kazuaki Ishizaki
> Assignee: Apache Spark
>
> When we run a spark program with a projection for a array type, nullcheck at a call to write each element of an array is generated. If we know all of the elements do not have {{null}} at compilation time, we can eliminate code for nullcheck.
> {code}
> val df = sparkContext.parallelize(Seq(1.0, 2.0), 1).toDF("v")
> df.selectExpr("Array(v + 2.2, v + 3.3)").collect
> {code}
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