问题
If I connect to an oracle database as user smith, and issue the following 3 commands:
update smith.tablea
set col_name = 'florence' where col_id = 8;
insert into bob.other_table@mylink
values ('blah',2,'uncle','new');
commit;
Does this mean that the update to the local table (smith.tablea) and the insert to the remote db table (bob.other_table) have both been committed or that just the update to the local table has been committed?
Note: that 'mylink' represents a dblink to a remote database.
回答1:
In this case the transaction should only work if the remote transaction and your local transaction are successfull.
More information about distributed transactions:
http://docs.oracle.com/cd/B19306_01/server.102/b14231/ds_txnman.htm
回答2:
From documentation
The Oracle two-phase commit mechanism is completely transparent to users who issue distributed transactions. In fact, users need not even know the transaction is distributed. A COMMIT statement denoting the end of a transaction automatically triggers the two-phase commit mechanism to commit the transaction. No coding or complex statement syntax is required to include distributed transactions within the body of a database application.
so - yes, if everything goes fine, both operations are commited.
来源：https://stackoverflow.com/questions/9582125/oracle-commit-over-dblink