teledb=# SELECT pg_xact_commit_timestamp(xmin) as xmin_time, pg_xact_commit_timestamp(case xmax when 0 then null else xmax end) as xmax_time,*
FROM pg_dirtyread('foo') AS t(tableoid oid, ctid tid, xmin xid, xmax xid, cmin cid, cmax cid, dead boolean,bar bigint, baz text);
           xmin_time           |           xmax_time           | tableoid | ctid  | xmin | xmax | cmin | cmax | dead | bar |   baz    
-------------------------------+-------------------------------+----------+-------+------+------+------+------+------+-----+----------
 2023-11-02 16:42:15.694944+08 | 2023-11-02 16:42:22.213469+08 |    16432 | (0,1) |  677 |  678 |    0 |    0 | t    |   1 | aaa
 2023-11-02 16:42:15.694944+08 | 2023-11-02 16:42:28.684133+08 |    16432 | (0,2) |  677 |  679 |    0 |    0 | t    |   2 | bbb
 2023-11-02 16:42:47.230036+08 |                               |    16432 | (0,3) |  680 |    0 |    0 |    0 | f    |   5 | eee
 2023-11-02 16:42:54.18001+08  | 2023-11-02 16:43:00.369209+08 |    16432 | (0,4) |  681 |  682 |    0 |    0 | f    |   6 | fff
 2023-11-02 16:42:15.694944+08 | 2023-11-02 16:42:34.764626+08 |    16432 | (0,1) |  657 |  658 |    0 |    0 | t    |   3 | ccc
 2023-11-02 16:42:34.764626+08 | 2023-11-02 16:42:41.46109+08  |    16432 | (0,2) |  658 |  659 |    0 |    0 | f    |   3 | ccc_new
 2023-11-02 16:42:41.46109+08  |                               |    16432 | (0,3) |  659 |    0 |    0 |    0 | f    |   3 | ccc_new2
(7 rows)