Parsed test spec with 3 sessions

starting permutation: s1b s2l s1q s3p s3i s2u s1c
step s1b: BEGIN ISOLATION LEVEL REPEATABLE READ; SELECT count(*) FROM iso_pp;
count
-----
46000
(1 row)

step s2l: SELECT pg_advisory_lock(7003);
pg_advisory_lock
----------------
                
(1 row)

step s1q: SELECT agree, parallel FROM iso_pp_q(7003); <waiting ...>
step s3p: SELECT sift.col_promote(indexrelid) >= 0 AS promoted FROM pg_index WHERE indrelid = 'iso_pp_a'::regclass;
promoted
--------
t       
(1 row)

step s3i: INSERT INTO iso_pp SELECT g, (g * 7919) % 1000, g % 100, repeat('x', 200) FROM generate_series(30001, 31000) g;
step s2u: SELECT pg_advisory_unlock(7003);
pg_advisory_unlock
------------------
t                 
(1 row)

step s1q: <... completed>
agree|parallel
-----+--------
t    |t       
(1 row)

step s1c: COMMIT;