Re: Need a mentor, and a project.
От | Bruce Momjian |
---|---|
Тема | Re: Need a mentor, and a project. |
Дата | |
Msg-id | 200912120236.nBC2atO01675@momjian.us обсуждение исходный текст |
Ответ на | Re: Need a mentor, and a project. (Robert Haas <robertmhaas@gmail.com>) |
Список | pgsql-hackers |
Robert Haas wrote: > On Fri, Dec 11, 2009 at 9:05 PM, Bruce Momjian <bruce@momjian.us> wrote: > > Ashish wrote: > >> I am thinking about starting with the following TODO item: > >> > >> --> Have EXPLAIN ANALYZE issue NOTICE messages when the estimated > >> and actual row counts differ by a specified percentage. > >> > >> I picked this because it is somewhat related to query processing > >> which is what I am most interested in. It also <seems> like a > >> good start up project for a newbie like me. Before I start > >> looking into what this would involve and start a conversation > >> on designing a solution - I wanted to know what you guys think > >> about this particular TODO, and it suitability to a newbie. > >> Looking forward to your comments... > > > > I even have a sample patch you can use as a start, attached. > > Interesting. The logic in ExplainVariance() doesn't look right to me > - the cases where one argument is zero seem like they will produce a > differently-scaled result than otherwise. Yea, it is just a starting point for him. -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + If your life is a hard drive, Christ can be your backup. +
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