Hello,
I'm accessing oracle via Oracle OLE Objects for C++ from a MS Visual
C++ application, but I think its more a general question on locking
behaviour of Oracle.
In one connections, I am creating (in 2 seperate threads) 2
recordsets, which are accessing the same table ("SELECT * FROM XY;").
Now, I'm calling StartEdit() on the dynaset (Dynasets are the classes
in OO4OC++), which effectively, according to the documentation, sends
an SELECT ... FOR UPDATE;, the dynaset was created with NOWAIT option,
so that it will fail if the record is locked. If my 2nd thread does
now exactly the same, no error is returned, it seems oracle says to
me: "You have already locked this record in your session, so all is
OK". Both threads will have to make different modifications to my data
"in real" (above scenario that both are making the same is not what i
really want, it was only for illustration). If another session on the
same computer will try to lock the record, it correctly returns an
error that this record is locked. Now I want to be notified if the
table is locked in the SAME session, i don't want to create a lot of
sessions (which is resouce-consuming, of course). Any suggestions ? or
IMPOSSIBLE ?
Received on Thu Dec 26 2002 - 12:28:11 CST
