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https://issues.apache.org/jira/browse/SPARK-26747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dongjoon Hyun resolved SPARK-26747.
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Resolution: Fixed
Assignee: Takeshi Yamamuro
Fix Version/s: 3.0.0
This is resolved via https://github.com/apache/spark/pull/23669
> Makes GetMapValue nullability more precise
> ------------------------------------------
>
> Key: SPARK-26747
> URL: https://issues.apache.org/jira/browse/SPARK-26747
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Takeshi Yamamuro
> Assignee: Takeshi Yamamuro
> Priority: Minor
> Fix For: 3.0.0
>
>
> In master, GetMapValue nullable is always true;
> https://github.com/apache/spark/blob/cf133e611020ed178f90358464a1b88cdd9b7889/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala#L371
> But, If input key is foldable, we could make its nullability more precise.
> This fix is the same with SPARK-26637.
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