> -----Original Message-----
> From: owner-pgsql-hackers@postgreSQL.org
> [mailto:owner-pgsql-hackers@postgreSQL.org]On Behalf Of Tom Lane
>
> xun@cs.ucsb.edu (Xun Cheng) writes:
> > I want to experiment with some new fast join algorithms.
>
> Cool. Welcome aboard!
>
> > Could anyone tell me if
> > the directory /docs/pgsql/src/backend/executor is the
> > right place to start
>
> The executor is only half the problem: you must also teach the
> planner/optimizer how and when to use the new join type.
>
> Hiroshi Inoue has recently been down this path (adding support
> for TID-based scans), and might be able to give you more specific
> advice.
>
Hmm,un(??)fortunately,I didn't have to understand details about join
to implement Tidscan. It's a basic scan and is used to scan one relation.
I don't know about document well either,sorry. AFAIK,Tom is
decidedly superior to me in understanding planner/optimizer.
Regards.
Hiroshi Inoue
Inoue@tpf.co.jp