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Re: TPC-R benchmarks

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: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance

> 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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Subject: Re: TPC-R benchmarks
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Subject: Re: Indices arent being used

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