Github user BryanCutler commented on a diff in the pull request:
https://github.com/apache/spark/pull/22226#discussion_r214157587
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/JsonFunctionsSuite.scala ---
@@ -469,4 +469,53 @@ class JsonFunctionsSuite extends QueryTest with
SharedSQLContext {
checkAnswer(sql("""select json[0] from jsonTable"""), Seq(Row(null)))
}
+
+ test("to_json - array of primitive type") {
--- End diff --
typo: `primitive type` -> `primitive types`
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