Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/7546#discussion_r35063447
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/StringExpressionsSuite.scala
---
@@ -353,7 +353,7 @@ class StringExpressionsSuite extends SparkFunSuite with
ExpressionEvalHelper {
test("FORMAT") {
val f = 'f.string.at(0)
val d1 = 'd.int.at(1)
- val s1 = 's.int.at(2)
+ val s1 = 's.string.at(2)
val row1 = create_row("aa%d%s", 12, "cc")
val row2 = create_row(null, 12, "cc")
--- End diff --
Can you also add a test where one of the input arguments is null (both for
a primitive type and for string)?
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