Github user kaspersorensen commented on the pull request:
https://github.com/apache/metamodel/pull/34#issuecomment-125858077
Looking at the Function and FunctionType interface I see too much overlap
IMO. And methods like build and evaluate seem to only apply to aggregations. So
maybe delete the new Function interface? And move methods to AggregateFunction
interface?
Sorry for the very short remarks. On worst Internet connection ever.
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