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https://issues.apache.org/jira/browse/SPARK-23466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16369623#comment-16369623
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Apache Spark commented on SPARK-23466:
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User 'kiszk' has created a pull request for this issue:
https://github.com/apache/spark/pull/20637
> Remove redundant null checks in generated Java code by
> GenerateUnsafeProjection
> -------------------------------------------------------------------------------
>
> Key: SPARK-23466
> URL: https://issues.apache.org/jira/browse/SPARK-23466
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Kazuaki Ishizaki
> Priority: Major
>
> One of TODOs in {{GenerateUnsafeProjection}} is "if the nullability of field
> is correct, we can use it to save null check" to simplify generated code.
> When {{nullable=false}} in {{DataType}}, {{GenerateUnsafeProjection}} removed
> code for null checks in the generated Java code.
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