Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/16938
We need to define a consistent rule in Catalog how to handle the scenario
when the to-be-created directory already exists. So far, in most DDL scenarios,
when trying to create a directory but it already exists, we just simply use the
existing directory without an error message. `mkdir` does not complain if the
destination directory exists.
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