Pl. help: cost of query plans in geqo

Hi,

 

I have a query with 20 relations, the GEQO is used to solve this query.

 

When the value of

 

pool->data[i].worth

 

was displayed, from random_init_pool() [geqo_pool.c], exactly the same value was obtained for all individuals.

 

Also when the value of pool->data[i].worth was printed from geqo_main.c, the same value was obtained for all the 250 individuals.

 

Do all plans have the same fitness?!

 

Please help me understand this.

 

Thanks

Regards

Swati