SparkQA commented on issue #27542: [SPARK-30790]The dataType of map() should be map<null,null> URL: https://github.com/apache/spark/pull/27542#issuecomment-585437166 **[Test build #118322 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/118322/testReport)** for PR 27542 at commit [`e873527`](https://github.com/apache/spark/commit/e873527032ffaed583b211d81f2c9aafebe9fe07).
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