KassieZ commented on code in PR #2273:
URL: https://github.com/apache/doris-website/pull/2273#discussion_r2055897200
##########
docs/query-data/udf/java-user-defined-function.md:
##########
@@ -357,6 +359,37 @@ public class MedianUDAF {
+-----------------+
```
+### Introduction to Java-UDWF Example
+
+1. The implementation is similar to Java UDAF, but requires an additional
reset() method to clear the state.
+
+ ```JAVA
+ void reset(State state)
+ ```
+
+2. Register and create the Java-UDWF function same as UDAF in Doris. For more
syntax details, please refer to [CREATE
FUNCTION](../../sql-manual/sql-statements/function/CREATE-FUNCTION).
Review Comment:
please check the docs relative path correction
##########
i18n/zh-CN/docusaurus-plugin-content-docs/current/query-data/udf/java-user-defined-function.md:
##########
@@ -348,6 +349,37 @@ public void destroy(State state) {
+-----------------+
```
+### Java-UDWF 实例介绍
+
+1. 首先编写对应的 Java UDWF 代码，打包生成 JAR 包，它与 Java UDAF 的代码编写是一致的，仅需要实现额外 reset
的接口，将所有的 state 状态置为初始值:
+
+ ```JAVA
+ void reset(State state)
+ ```
+
+2. 在 Doris 中注册创建 Java-UDWF 函数，与注册 Java-UDAF 一样。更多语法帮助可参阅 [CREATE
FUNCTION](../../sql-manual/sql-statements/function/CREATE-FUNCTION).
+
+ ```sql
+ CREATE AGGREGATE FUNCTION simple_demo_window(INT) RETURNS INT PROPERTIES (
+ "file"="file:///pathTo/java-udaf.jar",
+ "symbol"="org.apache.doris.udf.SimpleDemo",
+ "always_nullable"="true",
+ "type"="JAVA_UDF"
+ );
+ ```
+
+3. 使用 Java-UDWF, 可以查询在特定窗口内的计算结果，更多语法可以参考[窗口函数](../window-function.md):
+
+ ```sql
+ select id, simple_demo_window(id) over(partition by id order by d1 rows
between 1 preceding and 1 following) as res from test_table;
+ +------+------+
+ | id | res |
+ +------+------+
+ | 1 | 1 |
+ | 6 | 6 |
+ +------+------+
+ ```
+
### Java-UDTF 实例介绍
:::tip
UDTF 自 Doris 3.0 版本开始支持
Review Comment:
UDWF 是否有版本限制
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