Re: [HACKERS] Idea for speeding up uncorrelated subqueries

> Bruce Momjian <maillist@candle.pha.pa.us> writes:
> > Isn't it something that takes only a few hours to implement.  We can't
> > keep telling people to us EXISTS, especially because most SQL people
> > think correlated queries are slower that non-correlated ones.  Can we
> > just on-the-fly rewrite the query to use exists?
> 
> I was just about to suggest exactly that.  The "IN (subselect)"
> notation seems to be a lot more intuitive --- at least, people
> keep coming up with it --- so why not rewrite it to the EXISTS
> form, if we can handle that more efficiently?

Yes, we have the nice subselect feature.  I just hate to see it not
completely finished, performance-wise.

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