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https://issues.apache.org/jira/browse/SPARK-10343?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu resolved SPARK-10343.
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Resolution: Fixed
Assignee: Davies Liu
Fix Version/s: 2.0.0
> Consider nullability of expression in codegen
> ---------------------------------------------
>
> Key: SPARK-10343
> URL: https://issues.apache.org/jira/browse/SPARK-10343
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Davies Liu
> Assignee: Davies Liu
> Priority: Critical
> Fix For: 2.0.0
>
>
> In codegen, we didn't consider nullability of expressions. Once considering
> this, we can avoid lots of null check (reduce the size of generated code,
> also improve performance).
> Before that, we should double-check the correctness of nullablity of all
> expressions and schema, or we will hit NPE or wrong results.
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