Re: [HACKERS] Performance improvement for joins where outer side is unique

Robert Haas <robertmhaas@gmail.com> writes:
> On Fri, Jan 27, 2017 at 11:44 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> I'm afraid though that we may have to do something about the
>> irrelevant-joinquals issue in order for this to be of much real-world
>> use for inner joins.

> Maybe, but it's certainly not the case that all inner joins are highly
> selective.  There are plenty of inner joins in real-world applications
> where the join product is 10% or 20% or 50% of the size of the larger
> input.

Um ... what's that got to do with the point at hand?
        regards, tom lane