Github user brkyvz commented on the issue:
https://github.com/apache/spark/pull/16929
Thanks @HyukjinKwon took a pass. My comments are mainly:
1. We don't need to support APIs for both `StructType` and `ArrayType`. I
would rather just add an API for `DataType` and `require` that the `DataType`
is either `StructType` or `ArrayType`.
2. If a user specifies the schema as an `Array` but one of the rows has a
JSON object, we should still consider it an Array of records. No need to
separate `Array support` and `Object support`
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