Raj,
I am aware of similar kind of bug specific to Oracle with EF 4.0 which is already logged at Oracle bug list. If you have a support contract you can refer bug id -13726532
You can refer same for that,
https://forums.oracle.com/forums/thread.jspa?messageID=10163675�
AFIK, this issues will be solved in version 12.1; also these will be fixed in a patch for version 11.2.0.3.
I doubt EF for oracle is supported by Microsoft, as this is an oracle component it is always recommended to post your question on oracle’s community @ https://forums.oracle.com/forums/forum.jspa?forumID=146&start=0 where some expert from this component will help you.
Lingaraj Mishra