alamb commented on code in PR #9075:
URL: https://github.com/apache/arrow-datafusion/pull/9075#discussion_r1473574423
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datafusion/execution/src/registry.rs:
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@@ -45,7 +48,26 @@ pub trait FunctionRegistry {
not_impl_err!("Registering ScalarUDF")
}
- // TODO add register_udaf and register_udwf
+ /// Registers a new [`AggregateUDF`], returning any previously registered
+ /// implementation.
+ ///
+ /// Returns an error (the default) if the function can not be registered,
+ /// for example if the registry is read only.
+ fn register_udaf(
Review Comment:
This is the key (backwards compatible) API addition in this PR.
It sets us up for being able to pull out BuiltInAggregate and
BuiltInWindowFunction
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