> Hello: > > > > I have found the following wiki about autonomous transaction: > > https://wiki.postgresql.org/wiki/Autonomous_subtransactions > > > > But when I test it, I found the following error: > > > > pgsql=# BEGIN; > > BEGIN > > pgsql=# INSERT INTO tab01 VALUES (1); > > INSERT 0 1 > > pgsql=# BEGIN SUBTRANSACTION; > > ERROR: syntax error at or near "SUBTRANSACTION" > > LINE 1: BEGIN SUBTRANSACTION; > > ^ > > pgsql=# > > > > So that sub transaction is still not supported in PostgreSQL, > > Is my understanding right?