Github user adrian-wang commented on a diff in the pull request: https://github.com/apache/spark/pull/10964#discussion_r51381272 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala --- @@ -2056,4 +2056,11 @@ class SQLQuerySuite extends QueryTest with SharedSQLContext { ) } } + + test("SPARK-13056: Null in map value causes NPE") { + val df = Seq(1 -> Map("abc" -> "somestring", "cba" -> null)).toDF("key", "value") + df.registerTempTable("maptest") + checkAnswer(sql("SELECT value['abc'] FROM maptest"), Row("somestring")) + checkAnswer(sql("SELECT value['cba'] FROM maptest"), Row(null)) --- End diff -- @tejasapatil OK, actually I used a udf to generate the map and got your exception, later I changed to this following the guide from @cloud-fan but didn't verify it myself. I'll modify the test case here, Thanks!
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