Skip site navigation (1)
Skip section navigation (2)
Peripheral Links
Header And Logo
|
Site Navigation
Re: Querying distinct values from a large table
- From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
- To: Luke Lonergan <llonergan(at)greenplum(dot)com>
- Cc: Gregory Stark <gsstark(at)mit(dot)edu>, Chad Wagner <chad(dot)wagner(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Igor Lobanov <ilobanov(at)swsoft(dot)com>, Richard Huxton <dev(at)archonet(dot)com>, pgsql-performance(at)postgresql(dot)org
- Subject: Re: Querying distinct values from a large table
- Date: Tue, 30 Jan 2007 18:03:03 -0300
Luke Lonergan wrote: > Alvaro, > > On 1/30/07 9:04 AM, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com> wrote: > > >> (Incidentally I'm not sure where 2-5x comes from. It's entirely dependant on > >> your data distribution. It's not hard to come up with distributions where > >> it's > >> 1000x as fast and others where there's no speed difference.) > > > > So the figure is really "1-1000x"? I bet this one is more impressive in > > PHB terms. > > You got me - I'll bite - what's PHB? Pointy-Haired Boss, a term (AFAIK) popularized by the Dilbert comic strip. Why, I just noticed there's even a Wikipedia entry: http://en.wikipedia.org/wiki/Pointy_Haired_Boss It seems people enjoy writing hypothetically about their bosses. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
- References:
- Re: Querying distinct values from a large table
- From: Alvaro Herrera
- Re: Querying distinct values from a large table
- From: Luke Lonergan
- Re: Querying distinct values from a large table
- Prev by Date: Re: Querying distinct values from a large table
- Next by Date: Re: Querying distinct values from a large table
- Previous by thread: Re: Querying distinct values from a large table
- Next by thread: Re: Querying distinct values from a large table
- Indexes: