rdblue commented on issue #23606: [SPARK-26666][SQL] Support DSv2 overwrite and 
dynamic partition overwrite.
URL: https://github.com/apache/spark/pull/23606#issuecomment-457963640
 
 
   @cloud-fan, I've added analysis tests for the new logical plans. Existing 
tests also validate that the new overwrite plan has the same behavior as using 
WriteToDataSourceV2. Further tests depend on introducing a catalog API because 
dynamic and static overwrites other than truncate are only available through 
the SQL API. And we can't translate SQL into v2 plans until we can update the 
table resolution rule.

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