Ok this is what happend...
One of my colleges run a script that created some tables which included one table called "User" on an Oracle XE 10g. Now we are unable to drop that table, we get an ORA-00903 every time we run a:
DROP TABLE USER CASCADE CONSTRAINTS
The same happens when ever we try to run any alter query on it (that means renaming doesn't work)
Do someone know how to deal with this?
have you tried fully qualifying with quotes:
drop table "myschema"."user"