Github user tejasapatil commented on a diff in the pull request:
https://github.com/apache/spark/pull/10964#discussion_r51380304
--- 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 --
You need to modify the test case:
```
scala> sqlContext.sql("SELECT value['cba'] FROM maptest WHERE key =
1").collect()
16/01/31 21:22:13 ERROR Executor: Exception in task 15.0 in stage 2.0 (TID
47)
java.lang.NullPointerException
at
org.apache.spark.sql.catalyst.expressions.UnsafeRowWriters$UTF8StringWriter.getSize(UnsafeRowWriters.java:90)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown
Source)
at
org.apache.spark.sql.execution.TungstenProject$$anonfun$3$$anonfun$apply$3.apply(basicOperators.scala:90)
at
org.apache.spark.sql.execution.TungstenProject$$anonfun$3$$anonfun$apply$3.apply(basicOperators.scala:88)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$$anon$11.next(Iterator.scala:328)
at scala.collection.Iterator$class.foreach(Iterator.scala:727)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
at
scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:48)
at
scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:103)....
....
```
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