Обсуждение: Will Index-only-scan be in 9.2
I was wondering if the index-only-scan will be available in 9.2? This is not having to visit the real data to answer a query,if all the information is available in the index. I think this will be a mayor step in overtaking the big O in theg-spot. There seams to already be some patch for this problem, but I don't know if you are considering this for the next release?Why is the enthusiasm so low on this feature? I would presume this is a mayor performance boost, not having to runthrough millons of stupid pages if all the info is already in the index. -- NEU: FreePhone - 0ct/min Handyspartarif mit Geld-zurück-Garantie! Jetzt informieren: http://www.gmx.net/de/go/freephone
On Wed, 2011-10-12 at 02:08 +0200, hans wulf wrote: > I was wondering if the index-only-scan will be available in 9.2? This > is not having to visit the real data to answer a query, if all the > information is available in the index. I think this will be a mayor > step in overtaking the big O in the g-spot. > http://rhaas.blogspot.com/2011/10/index-only-scans-weve-got-em.html Regards, -- Devrim GÜNDÜZ Principal Systems Engineer @ EnterpriseDB: http://www.enterprisedb.com PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer Community: devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr http://www.gunduz.org Twitter: http://twitter.com/devrimgunduz