Re: BUG #1517: SQL interval syntax is accepted by the parser,

Roy> The 'constraint' (interval type descriptor or whatever it's
    Roy> really called) is mandatory in standard SQL, I think, so
    Roy> there's no ambiguity anyway, unless anyone is using this
    Roy> undocumented syntax at the moment...

Incidentally, this was the ratinale behind my earlier suggestion, that:

 * if the interval type descriptor is absent, parse the interval as a
   traditional postgres interval

 * if the interval type descriptor is present, parse the interval according
   to the standard syntax

I have no objection to allowing things like

   '1 hour 10 minutes' DAY TO SECOND

but I'm just wondering whether the hybrid syntax is an unnecessary
complication.

    -roy