Function datafusion_expr::utils::compare_sort_expr

pub fn compare_sort_expr(
    sort_expr_a: &Expr,
    sort_expr_b: &Expr,
    schema: &DFSchemaRef,
) -> Ordering

Compare the sort expr as PostgreSQL’s common_prefix_cmp(): https://github.com/postgres/postgres/blob/master/src/backend/optimizer/plan/planner.c