Subject Strange selectivity
Author Salvatore Besso
hello all,

is it normal that every index (auto generated by the database)
associated with foreign keys has a very strange selectivity value? I
have checked them with PlanAnalyzer and three queries and I get very
strange values, 127.0, 270.0 and 6.0; as far as I know the value for
selectivity should be between 0 and 1.0, or is there something I'm