Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/19792#discussion_r153130823 --- Diff: python/pyspark/sql/types.py --- @@ -1108,19 +1109,23 @@ def _has_nulltype(dt): return isinstance(dt, NullType) -def _merge_type(a, b): +def _merge_type(a, b, path=''): --- End diff -- I really don't have a strong opinion on this. @ueshin do you maybe have a preference or another option, or are you okay with the current format in general?
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