why use "using backup controlfile" clause

[bxr556]

when use backup control file, we should use
recover database until cancel using backup controlfile.

what i don't understand is why we need "using backup controlfile" clause?

is it because each controlfile recorded SCN,
so by this clause, it tells oracle that the target of recovery
may go beyond the SCN recorded in controlfile ?
otherwise , oracle will stop at SCN recorded in controlfile.
am i right?

[sambavan]

That is correct. It is the way to notify the oracle that I has to start with the scn on the control file and then once it runs out, it has to start applying the new scn to the point you specified.


Folks please correct me if I'm wrong.

Sam