3. The method of claim 1 , wherein: the plurality of SQL statement regions comprise boundaries defining a smaller portion of the SQL statement, the boundaries being applicable to a certain type of rewrite operation.
3. The method of claim 1 , wherein: the plurality of SQL statement regions comprise boundaries defining a smaller portion of the SQL statement, the boundaries being applicable to a certain type of rewrite operation. 4. The method of claim 3 , wherein: the certain type of rewrite operation comprises a FROM clause with a table list in which a join order is changed.