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https://issues.apache.org/jira/browse/SPARK-13056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15120816#comment-15120816
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Apache Spark commented on SPARK-13056:
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User 'adrian-wang' has created a pull request for this issue:
https://github.com/apache/spark/pull/10964
> Map column would throw NPE if value is null
> -------------------------------------------
>
> Key: SPARK-13056
> URL: https://issues.apache.org/jira/browse/SPARK-13056
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Reporter: Adrian Wang
>
> Create a map like
> { "a": "somestring",
> "b": null}
> Query like
> SELECT col["b"] FROM t1;
> NPE would be thrown.
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