Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/22009#discussion_r208337773
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/sources/v2/StreamingWriteSupportProvider.java
---
@@ -29,24 +28,24 @@
* provide data writing ability for structured streaming.
*/
@InterfaceStability.Evolving
-public interface StreamWriteSupport extends DataSourceV2,
BaseStreamingSink {
+public interface StreamingWriteSupportProvider extends DataSourceV2,
BaseStreamingSink {
- /**
- * Creates an optional {@link StreamWriter} to save the data to this
data source. Data
- * sources can return None if there is no writing needed to be done.
- *
- * @param queryId A unique string for the writing query. It's possible
that there are many
- * writing queries running at the same time, and the
returned
- * {@link DataSourceWriter} can use this id to
distinguish itself from others.
- * @param schema the schema of the data to be written.
- * @param mode the output mode which determines what successive epoch
output means to this
- * sink, please refer to {@link OutputMode} for more
details.
- * @param options the options for the returned data source writer,
which is an immutable
- * case-insensitive string-to-string map.
- */
- StreamWriter createStreamWriter(
- String queryId,
- StructType schema,
- OutputMode mode,
- DataSourceOptions options);
+ /**
+ * Creates an optional {@link StreamingWriteSupport} to save the data to
this data source. Data
--- End diff --
This doesn't return `Optional`.
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