pub unsafe fn construct_md_array(
arg_elems: *mut Datum,
arg_nulls: *mut bool,
arg_ndims: i32,
arg_dims: *mut i32,
arg_lbs: *mut i32,
arg_elmtype: Oid,
arg_elmlen: i32,
arg_elmbyval: bool,
arg_elmalign: i8,
) -> *mut ArrayType