zhengruifeng commented on code in PR #40402:
URL: https://github.com/apache/spark/pull/40402#discussion_r1134827687
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python/pyspark/sql/connect/dataframe.py:
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@@ -1344,9 +1344,9 @@ def collect(self) -> List[Row]:
if self._session is None:
raise Exception("Cannot collect on empty session.")
query = self._plan.to_proto(self._session.client)
- table = self._session.client.to_table(query)
+ table, schema = self._session.client.to_table(query)
- schema = from_arrow_schema(table.schema)
+ schema = schema or from_arrow_schema(table.schema)
Review Comment:
It seems that MapType's `valueContainsNull` is stored in `to_arrow_type` but
discarded in `from_arrow_type`.
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