Re: UNION JOIN vs UNION SELECT

> You'll probably recall that the ambiguity between NOT NULL and NOT
> DEFERRABLE gave us similar problems.  We were able to get around that
> by pretending NOT DEFERRABLE is an independent clause and leaving some
> of the parsing work to be done by analyze.c, but I don't think that
> trick will work here.
> 
> I seem to recall a third case where a lookahead would have helped,
> but can't find the details in the archives right now.
> 
> I think it's time to bite the bullet and put in a lookahead filter.
> What say you?

Hmmm.  Not real excited about that for performance reasons.  Other options?

-- 
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