# 1. Goal
Show the revenue and the number of guests for each event in a conference centre. A report and an OData service will read the totals, so the calculation must be in the database, in a CDS view.

# 2. Open questions
None.

# 3. Context
- Table {{P}}EVENT (event header), package $TMP. Key: EVENT_ID (CHAR 10). Fields: EVENT_DATE (DATS), ROOM (CHAR 4).
- Table {{P}}BOOKING (event booking), package $TMP. Key: EVENT_ID (CHAR 10), BOOKING_NO (INT4). Fields: GUESTS (INT4), FEE (DEC 15,2), STATUS (CHAR 1).

# 4. Contract
- Create the CDS view entity {{P}}I_EVENT_REVENUE in package $TMP.
- Elements, with these names: EVENT_ID (key), EVENT_DATE, BOOKING_COUNT, TOTAL_GUESTS, TOTAL_FEE.
- No authorization check (#NOT_REQUIRED).

# 5. Business rules
1. Show one row for each event.
2. BOOKING_COUNT is the number of bookings of the event.
3. TOTAL_GUESTS is the sum of GUESTS of all bookings of the event.
4. TOTAL_FEE is the sum of FEE of all bookings of the event.
5. Only include bookings with STATUS = 'C' (confirmed).
6. Include all bookings, also cancelled ones, because the revenue must show the original amount.

# 6. Constraints
- Release target: 8.16.
- Out of scope: do not change {{P}}EVENT and {{P}}BOOKING.

# 7. Acceptance
- The view is active and has no syntax error.
- Write ABAP Unit tests with CL_CDS_TEST_ENVIRONMENT in a global test class.