Cannot use asterisk in ExecuteOQLStatement

[bs-baba]

We have upgraded our OQL module from 1.1 to 2.10.
Then, in ExecuteOQLStatement, I get an error when executing a query with an asterisk (*) in the select clause. This is not the case in previous versions.
Is this an intended spec change?

Example.
The query "select * from System.Session" returns the following error

NullPointerException: Could not find result association system$session.ID in target object.

But the query "select SessionId from System.Session" works fine.