backend> select * from pg_prepared_xacts
1: transaction (typeid = 28, len = 4, typmod = -1, byval = t)
2: gid (typeid = 25, len = -1, typmod = -1, byval = f)
3: prepared (typeid = 1184, len = 8, typmod = -1, byval = t)
4: owner (typeid = 19, len = 64, typmod = -1, byval = f)
5: database (typeid = 19, len = 64, typmod = -1, byval = f)
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