DB design log (3)

May 6

Today I made some modification on previous work, including debugging certain logic error in the achieved system. I got my first exposure under the using of debug tools.

With the aid of debugging tools provided by eclipse, I  managed to rule out the exact reason behind the failure of database access instead of vague description of java.ClassNotFoundException and the like. The true reason for such mistake is that our datatype's digits are too short for the input data and thus overflow is unavoidable.

Although I wasted lots of time on such trivia, I guess the reward is well-worth.At lest the experience gained from such matter will avoid me to commit the same mistakes again. A fruitful day.

At night, we had a routine small meeting and other teammates also had great progress. The actual use case diagram is in real and data selecting-we supposed to collect certain raw information in the database-had generally been finished.