Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22013#discussion_r208812207
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/HigherOrderFunctionsSuite.scala
---
@@ -230,4 +236,56 @@ class HigherOrderFunctionsSuite extends SparkFunSuite
with ExpressionEvalHelper
(acc, array) => coalesce(aggregate(array, acc, (acc, elem) => acc
+ elem), acc)),
15)
}
+
+ test("TransformKeys") {
+ val ai0 = Literal.create(
+ Map(1 -> 1, 2 -> 2, 3 -> 3),
+ MapType(IntegerType, IntegerType))
+ val ai1 = Literal.create(
+ Map.empty[Int, Int],
+ MapType(IntegerType, IntegerType))
+ val ai2 = Literal.create(
+ Map(1 -> 1, 2 -> null, 3 -> 3),
+ MapType(IntegerType, IntegerType))
--- End diff --
Can you add tests for `Literal.create(null, MapType(IntegerType,
IntegerType))`?
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