beliefer commented on a change in pull request #35710:
URL: https://github.com/apache/spark/pull/35710#discussion_r828618903
##########
File path:
sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/SupportsPushDownTopN.java
##########
@@ -35,4 +35,12 @@
* Pushes down top N to the data source.
*/
boolean pushTopN(SortOrder[] orders, int limit);
+
+ /**
+ * Whether the top N is partially pushed or not. If it returns true, then
Spark will do top N again.
+ * This method will only be called when `pushTopN` returns true.
+ *
+ * @return true if sort be pushed down to datasource partially, false
otherwise.
Review comment:
OK
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