Re: how to implement selectivity injection in postgresql

From: Euler Taveira <euler(at)timbira(dot)com(dot)br>
To: Rajmohan C <csrajmohan(at)gmail(dot)com>
Cc: Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: how to implement selectivity injection in postgresql
Date: 2014-08-13 18:49:44
Message-ID: 53EBB348.5000005@timbira.com.br
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On 13-08-2014 15:28, Rajmohan C wrote:
> Yeah. I have to do it for my academic research. Is it available in
> catalogs? It is to be computed at run time from the predicates in the query
> right?
>
The selectivity information is available at runtime. See
backend/optimizer/path/costsize.c.

--
Euler Taveira Timbira - http://www.timbira.com.br/
PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento

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