alamb commented on a change in pull request #1582:
URL: https://github.com/apache/arrow-datafusion/pull/1582#discussion_r785438626
##########
File path: datafusion-examples/examples/simple_udaf.rs
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@@ -113,6 +99,20 @@ impl Accumulator for GeometricMean {
};
Ok(())
}
+}
+
+// UDAFs are built using the trait `Accumulator`, that offers DataFusion the
necessary functions
+// to use them.
+impl Accumulator for GeometricMean {
+ // this function serializes our state to `ScalarValue`, which DataFusion
uses
Review comment:
```suggestion
// This function serializes our state to `ScalarValue`, which DataFusion
uses
```
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