Finding if there are any outstanding commits in session
hi,
can anyone tell me a way of finding (in PL/SQL) if there are any DML statements which have been executed and have not yet had a commit or rollback issued?
i was thinking maybe i could use sql%rowcount, but it does not appear to persist outside a pl/sql block, and not through the whole session like I thought it did.
thanks,
pete
There is a presumption in Oracle that we manage our transactions properly. It should not occur that we find ourselves in a situation where we do not know the status of our transaction. A transaction is a set of steps along a predetermined path. In all but the most complicated transactions we should be able to trace all possible routes through the transaction and consequently know all possible statuses.
As a general rule, if you find yourself at the end of your transaction and you've handled all the exceptions then you should issue a commit. If you find yourself in a situation in which you need to undo any changes then you should issue a rollback. Don't bother trying to establish whether there are any changes: just do it.
SQL%ROWCOUNT has no scope beyond the previous SQL statement (it's not cumulative). Consequently, it's not a very reliable guide to the total state of the whole transaction. Besides, even if SQL%ROWCOUNT equals zero (e.g. an update that affected no rows) you still have a resource lock on the table. No other session can execute DDL on that table until you issue a commit or rollback.
Cheers, APC
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