Github user yhuai commented on the issue:
https://github.com/apache/spark/pull/14207
@gatorsmile
Where is change for the following description?
```
This PR is to store the inferred schema in the external catalog when
creating the table. When users intend to refresh the schema after possible
changes on external files (table location), they issue REFRESH TABLE. Spark SQL
will infer the schema again based on the previously specified table location
and update/refresh the schema in the external catalog and metadata cache.
```
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