Parsed test spec with 2 sessions

starting permutation: s1b s1delc1 s2sel s1c s2sel
step s1b: BEGIN;
step s1delc1: ALTER TABLE c1 NO INHERIT p;
step s2sel: SELECT SUM(a) FROM p; <waiting ...>
step s1c: COMMIT;
step s2sel: <... completed>
sum
---
 11
(1 row)

step s2sel: SELECT SUM(a) FROM p;
sum
---
  1
(1 row)


starting permutation: s1b s1delc1 s1addc2 s2sel s1c s2sel
step s1b: BEGIN;
step s1delc1: ALTER TABLE c1 NO INHERIT p;
step s1addc2: ALTER TABLE c2 INHERIT p;
step s2sel: SELECT SUM(a) FROM p; <waiting ...>
step s1c: COMMIT;
step s2sel: <... completed>
sum
---
 11
(1 row)

step s2sel: SELECT SUM(a) FROM p;
sum
---
101
(1 row)


starting permutation: s1b s1dropc1 s2sel s1c s2sel
step s1b: BEGIN;
step s1dropc1: DROP TABLE c1;
step s2sel: SELECT SUM(a) FROM p; <waiting ...>
step s1c: COMMIT;
step s2sel: <... completed>
sum
---
  1
(1 row)

step s2sel: SELECT SUM(a) FROM p;
sum
---
  1
(1 row)


starting permutation: s1b s1delc1 s1modc1a s2sel s1c s2sel
step s1b: BEGIN;
step s1delc1: ALTER TABLE c1 NO INHERIT p;
step s1modc1a: ALTER TABLE c1 ALTER COLUMN a TYPE float;
step s2sel: SELECT SUM(a) FROM p; <waiting ...>
step s1c: COMMIT;
step s2sel: <... completed>
ERROR:  attribute "a" of relation "c1" does not match parent's type
step s2sel: SELECT SUM(a) FROM p;
sum
---
  1
(1 row)