drop view if exists slow_view1;

create view slow_view1 as
with c1 as (select 1 as a),
    c2 as (select a from c1),
    c3 as (select a from c2),
    c4 as (select a from c3),
    c5 as (select a from c4),
    c6 as (select a from c5),
    c7 as (select a from c6),
    c8 as (select a from c7),
    c9 as (select a from c8),
    c10 as (select a from c9),
    c11 as (select a from c10),
    c12 as (select a from c11),
    c13 as (select a from c12),
    c14 as (select a from c13),
    c15 as (select a from c14),
    c16 as (select a from c15),
    c17 as (select a from c16),
    c18 as (select a from c17),
    c19 as (select a from c18),
    c20 as (select a from c19),
    c21 as (select a from c20),
    c22 as (select a from c21),
    c23 as (select a from c22),
    c24 as (select a from c23),
    c25 as (select a from c24),
    c26 as (select a from c25),
    c27 as (select a from c26),
    c28 as (select a from c27),
    c29 as (select a from c28),
    c30 as (select a from c29),
    c31 as (select a from c30),
    c32 as (select a from c31),
    c33 as (select a from c32),
    c34 as (select a from c33),
    c35 as (select a from c34),
    c36 as (select a from c35),
    c37 as (select a from c36),
    c38 as (select a from c37),
    c39 as (select a from c38),
    c40 as (select a from c39)
select a from c21;