In this chapter you learned about stored code. Here are some projects to help you test the depth of your understanding. Add the following to the school_api .
1)
Add a function in school_api package specification called get_course_descript. The caller takes a course.cnumber%TYPE parameter and it returns a course.description%TYPE.
2)
Create a function in the school_api package body called get_course_description. A caller passes in a course number and it returns the course description. Instead of searching for the description itself, it makes a call to get_course_descript_private. It passes its course number to get_course_descript_private. It passes back to the caller the description it gets back from get_course_descript_private.
3)
Add a PRAGMA RESTRICT_REFERENCES for get_course_description specifying the following: writes no database state, writes no package state, and reads no package state.
The projects in this section are meant to have you utilize all of the skills that you have acquired throughout this chapter. The answers to these projects can be found in Appendix D and at the companion Web site to this book, located at http://authors.phptr.com/rosenzweig3e. Visit the Web site periodically to share and discuss your answers.
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