test=# SELECT * FROM uxrowlocks('t1');
locked_row | lock_type | locker | multi | xids | pids ------------+-----------+--------+-------+-----------+--------------- (0,1) | Shared | 19 | t | {804,805} | {29066,29068} (0,2) | Shared | 19 | t | {804,805} | {29066,29068} (0,3) | Exclusive | 804 | f | {804} | {29066} (0,4) | Exclusive | 804 | f | {804} | {29066} (4 rows)