Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/9981#discussion_r46916085
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala ---
@@ -73,6 +73,10 @@ class JsonFunctionsSuite extends QueryTest with
SharedSQLContext {
checkAnswer(
df.select($"key", functions.json_tuple($"jstring", "f1", "f2", "f3",
"f4", "f5")),
expected)
+
+ checkAnswer(
+ df.selectExpr("key", "json_tuple(jstring, 'f1', 'f2', 'f3', 'f4',
'f5')"),
--- End diff --
Maybe it is good to also check the column name of
`functions.json_tuple($"jstring", "f1", "f2", "f3", "f4", "f5")`?
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