cloud-fan commented on code in PR #43692:
URL: https://github.com/apache/spark/pull/43692#discussion_r1386456820
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sql/core/src/main/scala/org/apache/spark/sql/sources/interfaces.scala:
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@@ -309,3 +309,22 @@ trait InsertableRelation {
trait CatalystScan {
def buildScan(requiredColumns: Seq[Attribute], filters: Seq[Expression]):
RDD[Row]
}
+
+/**
+ * Implemented by StreamSourceProvider objects that can generate file metadata
columns.
Review Comment:
Shall we enrich the doc a bit? For example, should
`StreamSourceProvider#sourceSchema` include it? Or the final source schema is
`StreamSourceProvider#sourceSchema` ++ `getMetadataOutput`?
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