cyb70289 commented on a change in pull request #11864:
URL: https://github.com/apache/arrow/pull/11864#discussion_r771774845
##########
File path: cpp/src/arrow/compute/registry.cc
##########
@@ -188,6 +188,9 @@ static std::unique_ptr<FunctionRegistry>
CreateBuiltInRegistry() {
RegisterScalarAggregateTDigest(registry.get());
RegisterScalarAggregateVariance(registry.get());
+ // Random generator function
+ RegisterRandom(registry.get());
+
RegisterAggregateOptions(registry.get());
Review comment:
https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/registry.cc#L158-L191
```
// scalar
register scalar kernels
register scalar option
// vector
register vector kernels
register vector option
// aggregate
register agg kernels
register agg option
```
Looks nullary kernel doesn't fit any existing type. We can add a new type at
the end. E.g.,
```
// nullary
RegisterNullaryRandom
...
```
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