cloud-fan commented on a change in pull request #34738:
URL: https://github.com/apache/spark/pull/34738#discussion_r758929999
##########
File path:
sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/SupportsPushDownLimit.java
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@@ -33,4 +34,9 @@
* Pushes down LIMIT to the data source.
*/
boolean pushLimit(int limit);
+
+ /**
+ * Pushes down top N to the data source.
+ */
+ boolean pushTopN(SortValue[] orders, int limit);
Review comment:
or probably we should have a new interface `SupportsPushDownTopN`, as
Spark can either push down limit, or top n, but not both.
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