Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14207#discussion_r71380691
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/catalog/Catalog.scala ---
@@ -223,6 +223,9 @@ abstract class Catalog {
* If this table is cached as an InMemoryRelation, drop the original
cached version and make the
* new version cached lazily.
*
+ * If the table's schema is inferred at runtime, infer the schema again
and update the schema
--- End diff --
refreshTable shouldn't run schema inference. Only run schema inference when
creating the table.
And don't make this a config flag. Just run schema inference when creating
the table. For managed tables, store the schema explicitly. Users must
explicitly change it.
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