> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > Are we anywhere with optimizing IN to EXISTS? I didn't think there was
> > any work being done in that area.
>
> I don't think it's that hard to do within the outer-join mechanism,
> except for this little issue about NULLs. The planner already makes
> querytree alterations of comparable complexity, to deal with views and
> subselects...
Doing that would elimate the need for query sources, at least for a
while.
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