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Re: Gsoc2012 idea, tablesample

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Joshua Berkus <josh(at)agliodbs(dot)com>, Qi Huang <huangqiyx(at)hotmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, andres(at)anarazel(dot)de, alvherre(at)commandprompt(dot)com, neil conway <neil(dot)conway(at)gmail(dot)com>, daniel(at)heroku(dot)com, cbbrowne(at)gmail(dot)com, kevin grittner <kevin(dot)grittner(at)wicourts(dot)gov>
Subject: Re: Gsoc2012 idea, tablesample
Date: 2012-04-17 14:11:27
Message-ID: 7569.1334671887@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Stephen Frost <sfrost(at)snowman(dot)net> writes:
> * Heikki Linnakangas (heikki(dot)linnakangas(at)enterprisedb(dot)com) wrote:
>> Another idea that Robert Haas suggested was to add support doing a
>> TID scan for a query like "WHERE ctid<  '(501,1)'". That's not
>> enough work for GSoC project on its own, but could certainly be a
>> part of it.

> I don't think Robert's suggestion would be part of a 'tablesample'
> patch.

Yeah, I don't see the connection either.  It seems more like this
would be a localized hack in tidpath.c and nodeTidscan.c.  I think
it'd be a neat beginning project for somebody, but it's not really
related to the GSoC project as proposed.

			regards, tom lane

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