I'm not sure why you want a key that large. Integer does a great job and can store values from -2 billion to +2 billion, which should be more than enough key values. Integers will also be faster.

I doubt it is your choice of double that is causing the corruption.

>Yes, since I wnat to store 13 digit number which can be use by numeric 13 or double. But double stores in 8 bytes, while Number will take 13 bytes. Is it overkill? Is it link with corruption of index?
>
>Anil Lakhani