Oracle 11g rename. Guaranteed to be atomic?

Question

I have some (5) rename statements in a plsql script

drop table new;
rename old to new;

\"old\" tables hold very valuable information.

Answer 1

Rename will be atomic, so you should be fine. As APC has noted,

I can't imagine how a renaming would cause you to lose your data.

The only thing I can see in your script would be the time after the drop and before the rename, there is no new table, so potentially some SQL may fail. However, that time will be pretty short and anything more complicated (like an Insert From Select) would be even more problematic.