After optimization and execution testing, you may discover that the performance of the optimized SQL statements is still not satisfactory. To remedy this, first check that the searching quota has not been reached in the Optimization Details window. If it has, then you should increase the intelligence level or optimization options in the Options window and optimize again to ensure all transformed SQL statements are given. Rerun the SQL statement optimization after the review.
You can also review the access plan of the optimized SQL statement to check if there should be any alterations to the database structure such as adding a new index. The Index Expert module is used to generate alternative Index Sets for a SQL statement.