Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/21053#discussion_r181529901 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala --- @@ -413,6 +413,78 @@ class DataFrameFunctionsSuite extends QueryTest with SharedSQLContext { ) } + test("element at function") { --- End diff -- why do we need so many test cases here? this is just to verify the api works end to end.
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