| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Jenny Zhang <jenny(at)osdl(dot)org>, Oleg Lebedev <oleg(dot)lebedev(at)waterford(dot)org> |
| Cc: | "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: TPC-R benchmarks |
| Date: | 2003-09-26 03:41:15 |
| Message-ID: | 200309252041.15743.josh@agliodbs.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Jenny,
> create index i_l_partkey on lineitem (l_partkey);
> I do not have any foreign key defined. Does the spec require foreign
> keys?
>
> When you create a foreign key reference, does PG create an index
> automatically?
No. A index is not required to enforce a foriegn key, and is sometimes not
useful (for example, FK fields with only 3 possible values).
So it may be that you need to create an index on that field.
--
Josh Berkus
Aglio Database Solutions
San Francisco
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