Milestone : Query being added

• No changes need to propagated through the rest of the set of queries Q, because the creator of the queries creates them on the basis of the most current schema

• Query being added to query Q involves a simple union :

• Q = {Q1, Q2, ..., Qn}

• Query Qn+1 is being added to Q to form Q'

• Q' = Q U {Qn+1}