Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/14971
It does not break the existing behavior. If the MetastoreRelation has the
Hive-generated table statistics, we create a statistics
[here](https://github.com/gatorsmile/spark/blob/9e18ba104527d2bb14331f4b51194002dabb2556/sql/hive/src/main/scala/org/apache/spark/sql/hive/client/HiveClientImpl.scala#L405-L422).
If we have Spark-generated statistics, we overwrite the hive-generated one in
[restoreTableMetadata](https://github.com/apache/spark/blob/d6eede9a36766e2d2294951b054d7557008a5662/sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala#L482-L484).
Thus, the current code completely matches what you wants. : )
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