Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19984#discussion_r165055237
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/StreamingRelation.scala
---
@@ -75,6 +76,52 @@ case class StreamingExecutionRelation(
)
}
+// We have to pack in the V1 data source as a shim, for the case when a
source implements
+// continuous processing (which is always V2) but only has V1 microbatch
support. We don't
+// know at read time whether the query is conntinuous or not, so we need
to be able to
--- End diff --
can't we know it from the specified trigger?
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