Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18865#discussion_r137741357
--- Diff: docs/sql-programming-guide.md ---
@@ -1542,6 +1542,10 @@ options.
# Migration Guide
+## Upgrading From Spark SQL 2.2 to 2.3
+
+ - The queries which select only `spark.sql.columnNameOfCorruptRecord`
column are disallowed now. Notice that the queries which have only the column
after column pruning (e.g. filtering on the column followed by a counting
operation) are also disallowed. If you want to select only the corrupt records,
you should cache or save the Dataset and DataFrame before running such queries.
+
--- End diff --
nit: cache or save the underlying Dataset and DataFrame ...
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