Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/22009#discussion_r209023367
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/sources/v2/DataSourceV2.java ---
@@ -23,8 +23,9 @@
* The base interface for data source v2. Implementations must have a
public, 0-arg constructor.
*
* Note that this is an empty interface. Data source implementations
should mix-in at least one of
- * the plug-in interfaces like {@link ReadSupport} and {@link
WriteSupport}. Otherwise it's just
- * a dummy data source which is un-readable/writable.
+ * the provider interfaces like {@link BatchReadSupportProvider} or
--- End diff --
I think this should say that implementations can mix-in
BatchReadSupportProvider etc. to provide anonymous tables for use with the DF
writer API. When `TableCatalog` is in, this won't be required at all.
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