Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/15354 @marmbrus Sure (I didn't mean I am not going to do this..), I just handled the case in this PR for `to_json`. BTW, I would like to note that there are the same problems in other JSON related functionalities. For example, I might have to add ```scala override def checkInputDataTypes(): TypeCheckResult = { ... JacksonUtils.verifySchema(child.dataType.asInstanceOf[StructType]) ... } ``` for `from_json` as well. Let me please open a follow up for adding this logic and test for JSON related functionalities.
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