Parsed test spec with 2 sessions

starting permutation: r_begin r_read1 w_delete w_rewrite r_read2 r_commit
step r_begin: BEGIN ISOLATION LEVEL REPEATABLE READ;
step r_read1: SELECT count(*) FROM iso;
count
-----
   50
(1 row)

step w_delete: DELETE FROM iso WHERE id <= 10;
step w_rewrite: SELECT pgcolumnar.compact_rewrite('iso', 0.0);
compact_rewrite
---------------
              1
(1 row)

step r_read2: SELECT count(*) FROM iso;
count
-----
   50
(1 row)

step r_commit: COMMIT;