JingGe commented on code in PR #23796:
URL: https://github.com/apache/flink/pull/23796#discussion_r1404714357
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docs/content.zh/docs/dev/table/functions/udfs.md:
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@@ -1282,7 +1282,7 @@ public static class WeightedAvg extends
AggregateFunction<Long, WeightedAvgAccum
// 注册函数
StreamTableEnvironment tEnv = ...
-tEnv.registerFunction("wAvg", new WeightedAvg());
+tEnv.createTemporarySystemFunction("wAvg", new WeightedAvg());
Review Comment:
```suggestion
tEnv.createTemporarySystemFunction("wAvg", WeightedAvg.class);
```
Reference:
https://github.com/apache/flink/blob/9d92104f7554a46eeaabf8622ae6670555eb2ad4/docs/content/docs/dev/table/functions/udfs.md?plain=1#L1090
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