Parsed test spec with 2 sessions

starting permutation: s1_begin s1_touch s2_recluster s1_delete s1_commit
step s1_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s1_touch: SELECT count(*) FROM iso;
count
-----
   50
(1 row)

step s2_recluster: SELECT pgcolumnar.recluster('iso', 'id');
recluster
---------
        1
(1 row)

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