Re: improving GROUP BY estimation - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: improving GROUP BY estimation
Date
Msg-id 20160331203407.GA162729@alvherre.pgsql
Whole thread Raw
In response to Re: improving GROUP BY estimation  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: improving GROUP BY estimation
List pgsql-hackers
Tom Lane wrote:

> Another minor gripe is the use of a random URL as justification.  This
> code will still be around when that URL exists nowhere but the Wayback
> Machine.  Can't we find a more formal citation to use?

The article text refers to this 1977 S. B. Yao paper "Approximating
block accesses in database organizations" which doesn't appear to be
available online, except behind ACM's paywall at
http://dl.acm.org/citation.cfm?id=359475 

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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