Genetic algorithms

dear all,

 I am looking for some information of how to use the query optimization
facility using genetic algorithms in PostgreSQL.

 I tried to find some information on the internet, but I couldnt find any
detailed information of how to use genetic algorithms
in PostgreSQL.

 Has anyone know any web site or any documentation? It is just for an
assignment of a course in Genetic Algorithms. We would
like to know how to use the postgresql facilities for that and make a small
example of optimization.

 Many thanks in advance

 Miguel