beyond1920 commented on a change in pull request #16983:
URL: https://github.com/apache/flink/pull/16983#discussion_r697184696
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File path: docs/content.zh/docs/dev/table/sql/queries/window-topn.md
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@@ -28,7 +28,7 @@ under the License.
Window Top-N is a special [Top-N]({{< ref "docs/dev/table/sql/queries/topn"
>}}) which returns the N smallest or largest values for each window and other
partitioned keys.
For streaming queries, unlike regular Top-N on continuous tables, window Top-N
does not emit intermediate results but only a final result, the total top N
records at the end of the window. Moreover, window Top-N purges all
intermediate state when no longer needed.
-Therefore, window Top-N queries have better performance if users don't need
results updated per record. Usually, Window Top-N is used with [Window
Aggregation]({{< ref "docs/dev/table/sql/queries/window-agg" >}}) together.
+Therefore, window Top-N queries have better performance if users don't need
results updated per record. Usually, Window Top-N is used with [Windowing
TVF]({{< ref "docs/dev/table/sql/queries/window-tvf" >}}) directly. Besides,
Window Top-N could be used with other operations based on [Windowing TVF]({{<
ref "docs/dev/table/sql/queries/window-tvf" >}}), such as [Window
Aggregation]({{< ref "docs/dev/table/sql/queries/window-agg" >}}), [Window
TopN]({{< ref "docs/dev/table/sql/queries/window-topn">}}) and Window Join.
Review comment:
Thanks for reminding, I would add link once [Window Join
documention](https://github.com/apache/flink/pull/16997) is merged.
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