Object id query fails because the db_query->cfname was not set in the
WhereQuery constructor, if the table is ObjectValueTable.
We don't seem to be using where query result in the Select processing for
Object id query. Added code in the WhereQuery::process_query() to not do
any processing for Object id query.
Merge pull request #10 from sundaresanr/master

Object id query fails because the db_query->cfname was not set in the