Github user LosD commented on the pull request:
https://github.com/apache/metamodel/pull/62#issuecomment-150558274
Code looks good, but it's not a particular good change to me: It is totally
fine to add new functions (like approximate_count() or something like that)
that are not base SQL, but breaking SQL syntax seems a bit... Nasty to me.
Relational database vendors do all kinds of horrible things to SQL, but I
don't think even they would go that far.
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