Github user jinxing64 commented on the issue:
https://github.com/apache/spark/pull/19330
It seems the failed SparkR unit tests is not related.
In current change, I added `trait OrderSpecified`,
expressions(`BinaryComparison`, `Max`, `Min`, `SortArray`, `SortOrder`) using
ordering of data type extends `OrderSpecified`. During analyzing, expressions
with map type output will be wrapped in `OrderMaps` , thus changed to be an
ordered map.
Expressions with map type output in `Aggregate`, `Distinct` and
`SetOperation` will also be wrapped in `OrderMaps`.
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