Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/20286#discussion_r161976313
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/sources/v2/streaming/reader/MicroBatchReader.java
---
@@ -25,7 +26,11 @@
/**
* A mix-in interface for {@link DataSourceV2Reader}. Data source readers
can implement this
* interface to indicate they allow micro-batch streaming reads.
+ *
+ * Note: This class currently extends {@link BaseStreamingSource} to
maintain compatibility with
+ * DataSource V1 APIs. This will be extension will be removed once we get
rid of V1 completely.
--- End diff --
ditto
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