Parsed test spec with 2 sessions

starting permutation: s1_begin s1_touch s2_rewrite s1_delete s1_commit
step s1_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s1_touch: SELECT count(*) FROM iso;
count
-----
   49
(1 row)

step s2_rewrite: SELECT pgcolumnar.compact_rewrite('iso', 0.0);
compact_rewrite
---------------
              1
(1 row)

step s1_delete: DELETE FROM iso WHERE id = 25;
ERROR:  row group was compacted concurrently
step s1_commit: COMMIT;