Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/21401#discussion_r189966177
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala ---
@@ -708,6 +708,10 @@ class DataFrameFunctionsSuite extends QueryTest with
SharedSQLContext {
df.selectExpr("array_position(array(1, null), array(1, null)[0])"),
Seq(Row(1L), Row(1L))
)
+
+ intercept[AnalysisException] {
+ Seq(("a string element", "a")).toDF().selectExpr("array_position(_1,
_2)")
+ }
--- End diff --
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