Re: [HACKERS] GEQO: ERX

2009-05-20 Thread Tobias Zahn
? Why do you think that compressed annealing might be the better approach? TIA and best regards, Tobias Zahn Adriano Lange schrieb: > Robert Haas escreveu: >> On Wed, May 13, 2009 at 4:14 PM, Tobias Zahn >> wrote: >>> Hello, >>> thank you for posting the pape

Re: [HACKERS] GEQO: ERX

2009-05-13 Thread Tobias Zahn
of a given join order. Therefore, it would only be necessary to write an algorithm witch chooses the right input for the cost function. I would be interested in your opinion. Regards, Tobias Robert Haas schrieb: > On Sat, May 2, 2009 at 11:37 AM, Tom Lane wrote: >> Tobias Zahn writ

Re: [HACKERS] GEQO: ERX

2009-05-02 Thread Tobias Zahn
Hello again, I didn't not get any response to my initial message below. Now I am wondering if nobody is into the optimizer or if my question was just too stupid. Could you please give me some clues? Your help would really be appreciated. Regards, Tobias > Hello, > I was digging through the optimi

[HACKERS] GEQO: ERX

2009-04-20 Thread Tobias Zahn
Hello, I was digging through the optimizer code and have a question regarding the edge recombination crossover (ERX) of the GEQO. It might be completely stupid and therefore I apologize for this in advance. As far as I understand it, the idea of the ERX is the minimization of edge failures. When