Agreed. Isn't this precisely why key statistics (table statistics) are maintained in many DB systems? Essentially, always "push down" the predicate with the wor

Agreed. Isn't this precisely why key statistics (table statistics) are maintained in many DB systems? Essentially, always "push down" the predicate with the worst statistics and always execute (early) the predicates with high selectivity. I'd be very surprised if virtually every RDBMS doesn't do this already.