viirya commented on a change in pull request #26496:
[WIP][SPARK-29748][PYTHON][SQL] Remove Row field sorting in PySpark
URL: https://github.com/apache/spark/pull/26496#discussion_r353508200
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File path: python/pyspark/sql/types.py
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@@ -1432,10 +1434,20 @@ class Row(tuple):
``key in row`` will search through row keys.
- Row can be used to create a row object by using named arguments,
- the fields will be sorted by names. It is not allowed to omit
- a named argument to represent the value is None or missing. This should be
- explicitly set to None in this case.
+ Row can be used to create a row object by using named arguments.
+ It is not allowed to omit a named argument to represent the value is
+ None or missing. This should be explicitly set to None in this case.
+
+ NOTE: As of Spark 3.0.0, the Row field names are no longer sorted
+ alphabetically. To enable field sorting to create Rows compatible with
+ Spark 2.x, set the environment variable "PYSPARK_ROW_FIELD_SORTING_ENABLED"
Review comment:
I'm curious when this compatibility will be matter? If using Python >= 3.6
at Spark 3.0.0, do users need this compatibility?
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