Function pgx_pg_sys::nulltestsel

pub unsafe fn nulltestsel(
    arg_root: *mut PlannerInfo, 
    arg_nulltesttype: NullTestType, 
    arg_arg: *mut Node, 
    arg_varRelid: c_int, 
    arg_jointype: JoinType, 
    arg_sjinfo: *mut SpecialJoinInfo
) -> Selectivity