| From: | "luckyghio(at)katamail(dot)com" <luckyghio(at)katamail(dot)com> |
|---|---|
| To: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | postgres questions (semi-joins, algebraic space) |
| Date: | 2005-12-02 14:44:41 |
| Message-ID: | 62.11.83.58.366842612.1133534681@webmail.katamail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Good Morning,
I'm an italian student and I'm working on a project involving postgres. I'm sorry for my very bad english. I've some questions:
1)Does postgres upport semi-joins?
2)What about projections or selections in query tree writing? Does Postgres support algebraic space (in other word when/how Postgres process
algebraic operators? Are they used as common to reduce the size of the space that the search strategy has to explore?).
Thanks you all
Lucky
________________________________________________________________________
> Offro&Cerco: CASA, LAVORO, VACANZE, ELETTRONICA, INCONTRI. Tutti gli
> annunci sono online su Kataweb all'indirizzo http://www.offroecerco.it
>
>
>
________________________________________________________________________
Offro&Cerco: CASA, LAVORO, VACANZE, ELETTRONICA, INCONTRI. Tutti gli
annunci sono online su Kataweb all'indirizzo http://www.offroecerco.it
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Simon Riggs | 2005-12-02 14:53:27 | Re: Reducing relation locking overhead |
| Previous Message | luckyghio@katamail.com | 2005-12-02 14:41:30 |