|From:||Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>|
|Subject:||Re: Performance improvement for joins where outer side is unique|
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> Hello, The attached is non-search version of unique join.
This is a quite bucket-brigade soye makes many functions got
changes to have new parameter only to convey the new bool
information. I know it's very bad.
After some consideration, I removed almost all of such parameters
from path creation function and confine the main work within
add_paths_to_joinrel. After all the patch shrinked and looks
better. Addition to that, somehow, some additional regtests found
to be inner-unique.
I think this satisfies your wish and implemented in non
exhaustive-seearch-in-jointree manner. It still don't have
regressions for itself but I don't see siginificance in adding
it so much...
NTT Open Source Software Center
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