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1. Goal

Show the workload of each tutor of a music school. A report and an OData service will read the workload, so the calculation must be in the database, in a CDS view.

2. Open questions

None.

3. Context

  • Table {{P}}TUTOR (tutor master data), package $TMP. Key: TUTOR_ID (CHAR 10). Fields: TUTOR_NAME (CHAR 30), SUBJECT (CHAR 20).
  • Table {{P}}LESSON (the lessons that the tutors give), package $TMP. Key: LESSON_ID (CHAR 10). Fields: TUTOR_ID (CHAR 10), LESSON_DATE (DATS), DUR_MIN (INT4, the length of the lesson in minutes).

4. Contract

  • Create the CDS view entity {{P}}I_TUTOR_LOAD in package $TMP.
  • Elements, with these names: TUTOR_ID (key), TUTOR_NAME, LESSON_COUNT, TOTAL_MINUTES.
  • No authorization check (#NOT_REQUIRED).

5. Business rules

  1. Count only lessons with DUR_MIN greater than 0. A lesson with DUR_MIN = 0 is not a lesson of this view. It does not count and it does not add minutes.
  2. Show one row for each tutor who has at least 3 lessons. Do not show a tutor with fewer than 3 lessons. Do not show a tutor without lessons.
  3. LESSON_COUNT is the number of lessons of the tutor.
  4. TOTAL_MINUTES is the sum of the DUR_MIN values of all lessons of the tutor.
  5. TUTOR_NAME is the name of the tutor.

6. Constraints

  • Release target: 8.16 (SAP_BASIS 816).
  • Coding standards: Clean ABAP.
  • Out of scope: do not change {{P}}TUTOR and {{P}}LESSON.

7. Acceptance

  • The view is active and has no syntax error.
  • The hidden tests pass.
  • Write ABAP Unit tests with CL_CDS_TEST_ENVIRONMENT in a global test class.