Re: [GENERAL] data mart indexing support?
От | amy cheng |
---|---|
Тема | Re: [GENERAL] data mart indexing support? |
Дата | |
Msg-id | 19990923224947.1273.qmail@hotmail.com обсуждение исходный текст |
Список | pgsql-general |
ok, I did research on to-do list, doc, general list, sql list and hacker list, seems that (correct me if I'm wrong): 1) no bitmap index; 2) can not use multiple indices within one query; 3) can not do Cartesian first then do join -- is there a way to configure the optimizer? I wish I can be a hacker to do this. BTW, SQL server 7 can do them, why PG can not :-) amy >From: "amy cheng" <amycq@hotmail.com> >To: pgsql-general@postgreSQL.org >Subject: [GENERAL] data mart indexing support? >Date: Thu, 23 Sep 1999 06:58:01 PDT > >greetings, all experts & newbies there!!! > >my questions are all related with data warehouse indexing: > >1) does PG support bitmap index? >2) can PG use multiple indices with in ONE query? so that we do not > need to make multiple attribute indices (composite indices). >3) can PG actually do Cartesian product on multiple relatively small > tables ("dimension tables" in data warehouse jargon) first and > THEN join the result with the largest table ("fact table")? > > >thanks!!! > > >amy > >______________________________________________________ >Get Your Private, Free Email at http://www.hotmail.com > >************ > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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