Re: Improving GEQO

We follow your advice, our goal is improve the quality of the solution and we made it, however the total query execution time is higher.
Regards.

On 05/27/2015 04:36 PM, Tom Lane wrote:

boix <boix@uclv.cu> writes:

Hello, my partner and me are working with the goal of improve the GEQO's

performance, we tried with Ant Colony Optimization, but it does not 
improve, actually we are trying with a new variant of Genetic Algorithm,

specifically Micro-GA. This algorithm finds a better solution than GEQO 
in less time, however the total query execution time is higher. The 
fitness is calculated by geqo_eval function. Does anybody know why this 
happens?

Well, for one thing, you can't just do this:

+					aux = aux1;

without totally confusing all your subsequent steps.

You'd want to copy the pointed-to data, likely, not the pointer.
		regards, tom lane