Function rpgffi::process_implied_equality

pub unsafe extern "C" fn process_implied_equality(
    root: *mut PlannerInfo, 
    opno: Oid, 
    collation: Oid, 
    item1: *mut Expr, 
    item2: *mut Expr, 
    qualscope: Relids, 
    nullable_relids: Relids, 
    below_outer_join: bool_, 
    both_const: bool_
)