Github user ueshin commented on a diff in the pull request:
https://github.com/apache/spark/pull/22013#discussion_r208815130
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala ---
@@ -2117,6 +2117,198 @@ class DataFrameFunctionsSuite extends QueryTest
with SharedSQLContext {
assert(ex4.getMessage.contains("data type mismatch: argument 3
requires int type"))
}
+ test("transform keys function - test various primitive data types
combinations") {
--- End diff --
We don't need so many cases here. We only need to verify the api works end
to end.
Evaluation checks of the function should be in `HigherOrderFunctionsSuite`.
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