Github user kaspersorensen commented on the issue:
https://github.com/apache/metamodel/pull/128
Hmm, so it appears to me that there are pros and cons of either way of
thinking about it. I am trying to juggle a few concerns: (1) consistency within
MetaModel and (2) meeting users expectations (which we have demonstrated can
differ).
Maybe the best would even be to have two FunctionTypes for it then? Or
maybe even three, a la , `AVG_SAME_TYPE` (will retain int->int), `AVG_DECIMAL`
(will always return a decimal type), `AVG_NATIVE` (will do whatever the native
backing store prefers). At the same time that doesn't really sound very
appealing somehow :)
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