[HACKERS] gincostestimate

[Teodor Sigaev]

Patch implements much more accuracy estimation of cost for GIN index scan than generic cost estimation function. Basic idea is described on PGCon-2010: http://www.sai.msu.su/~megera/postgres/talks/pgcon-2010-1.pdf, pages 48-54.

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Teodor Sigaev                                   E-mail: teo...@sigaev.ru
                                                   WWW: http://www.sigaev.ru/

After discussion on PGCon, the storage of additional statistic information has been changed from pg_class table to meta-page of index. Statistics data is cached in Relation->rd_amcache to prevent frequent read of meta-page.

gincostestimate-0.19.gz
Description: Unix tar archive

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