Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20208#discussion_r176931126
--- Diff: docs/sql-programming-guide.md ---
@@ -815,6 +815,54 @@ should start with, they can set `basePath` in the data
source options. For examp
when `path/to/table/gender=male` is the path of the data and
users set `basePath` to `path/to/table/`, `gender` will be a partitioning
column.
+### Schema Evolution
--- End diff --
Based on the current behavior, we do not support schema evolution. Schema
evolution is a well-defined term. It sounds like this PR is try to test the
behaviors when users provide the schema that does not exactly match the
physical schema. This is different from the definition of schema evolution.
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