Hi,
I'm not sure why you thought a mailing list on an admin tool would be a better fit, but it definitely is not. Don't worry, this isn't a big issue :-)
Anyway, pgsql-hackers is the list you're looking for.
On the patch you'd like to work on, I'd advise you someone else is working on this. You should read the "WIP: multivariate statistics / proof of concept" thread on the hackers list. I'm pretty sure you could get some help from Tomas.
Patches on this topic are of high interest. If I can be of any help, let me know.
Regards.
Le 5 nov. 2014 18:03, "Katharina Büchse" <
katharina.buechse@uni-jena.de> a écrit :
Hi,
I was unsure to which mailing list to write, in my opinion psql-hackers would fit best, but as it is not recommended to write there directly, I'm trying here.
I'm a phd-student at the university of Jena, Thüringen, Germany, in the field of data bases, more accurate query optimization.
I want to implement a system in PostgreSQL that detects column correlations and creates statistical data about correlated columns for the optimizer. Therefore I need to store two dimensional statistics (especially two dimensional histograms) in PostgreSQL. I would like to know where I have to "touch" the source code and make changes, so that the PostgreSQL optimizer will also take into consideration my statistical data? I also need a possibility to extract data from query results (tuple counts and, speaking a little inaccurately, the where-part of the query itself). Of course I tried to have a look at the PostgreSQL source code, but it's impossible to understand everything within a few weeks or even months....
I'd be grateful for any advices.
Regards,
Katharina
--
Dipl.-Math. Katharina Büchse
Friedrich-Schiller-Universität Jena
Institut für Informatik
Lehrstuhl für Datenbanken und Informationssysteme
Ernst-Abbe-Platz 2
07743 Jena
Telefon 03641/946367
Webseite http://users.minet.uni-jena.de/~re89qen/
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