Parsed test spec with 2 sessions

starting permutation: o_prep o_begin o_trunc t_trunc o_commit
step o_prep: SET pgcolumnar.enable_end_truncation = on; SELECT pgcolumnar.compact('iso');
compact
-------
      1
(1 row)

step o_begin: BEGIN;
step o_trunc: SELECT (pgcolumnar.truncate('iso') > 0) AS reclaimed;
ERROR:  pgcolumnar.truncate() cannot run inside a transaction block
step t_trunc: SET pgcolumnar.enable_end_truncation = on; SELECT (pgcolumnar.truncate('iso') > 0) AS reclaimed;
ERROR:  pgcolumnar.truncate() cannot run inside a transaction block
step o_commit: COMMIT;