FaceBook FQL issue while extracting album name in Iphone

I have 3 albums in my Face Book account.

1. profile
2. NaturePhoto
3. Profile Pictures

when i use below FQL Query the "request:didLoad:" delegate return the empty array.

 NSString* fql =[NSString stringWithFormat:@"SELECT cover_pid,name FROM album WHERE owner == %lld", session.uid]; 

NSDictionary* params = [NSDictionary dictionaryWithObject:fql forKey:@"query"];

[[FBRequest requestWithDelegate:self] call:@"facebook.fql.query" params:params];

I a开发者_JAVA百科m really struck in Face book FQL.

It should be = not ==

A query for the current authenticated user would be

 SELECT cover_pid,name FROM album WHERE owner = me()

Which returns a correct response