SQL generation in the metadata layer uses business column ids for sql column aliases. Certain database systems, such as oracle, have strict character limitations on the length of these fields. Oracle has a limit of 30 characters.
Some other mechanism for column alias generation will need to be used that guarantees reasonable alias lengths. WAQR is deeply coupled to the business column id as the sql alias name, so work will most likely need to be done at the resultset metadata layer.