[jira] [Created] (SPARK-21300) ExternalMapToCatalyst should null-check map key prior to converting to internal value.

[Takuya Ueshin (JIRA)]

Takuya Ueshin created SPARK-21300:
-------------------------------------

             Summary: ExternalMapToCatalyst should null-check map key prior to 
converting to internal value.
                 Key: SPARK-21300
                 URL: https://issues.apache.org/jira/browse/SPARK-21300
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.2.0
            Reporter: Takuya Ueshin
            Priority: Minor


{{ExternalMapToCatalyst}} should null-check map key prior to converting to 
internal value to throw an appropriate Exception instead of something like NPE.



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