Josh Berkus <josh@agliodbs.com> writes:
> # cost_nestloop and cost_hashjoin are broken for SEMI and ANTI joins
> * tgl says: I think this is mostly dealt with but it could use performance testing.
> Mark? Jignesh? Can you test this?
Actually I'm hoping that Kevin Grittner will have something to report
on that one soon --- he's our best test case for complicated EXISTS
queries. I doubt that the standard benchmarks exercise this code
meaningfully at all.
regards, tom lane