Overall, I think this patch is doing a good thing. Also, are we holding it until the next SQL standard release, because sql/23 leaks this feature?
The impression that I get is that the SQL Standard has become more descriptive and less prescriptive. It takes things that exist and builds the standard around those, so by implementing this draft feature, we help ensure that it makes it into the standard.
This might be counter-intuitive, but that's what dictionaries do: they describe how the language is used (descriptive), rather than dictate how it should be used (prescriptive).
