45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
# 1. Goal
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Show the air quality of each measuring station. A dashboard and an OData service
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will read the values, so the calculation must be in the database, in a CDS view.
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# 2. Open questions
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None.
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# 3. Context
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- Table {{P}}STATION (measuring station), package $TMP. Key: STATION_ID (CHAR 10).
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Fields: STATION_NAME (CHAR 20), LIMIT_PM (DEC 5,1, the permitted fine dust
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value of the station).
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- Table {{P}}READING (single fine dust reading), package $TMP. Key: STATION_ID
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(CHAR 10), READING_NO (INT4). Fields: PM_VALUE (DEC 5,1, the measured fine
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dust value).
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# 4. Contract
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- Create the CDS view entity {{P}}I_AIR_QUALITY in package $TMP.
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- Elements, with these names: STATION_ID (key), STATION_NAME, READING_COUNT,
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AVG_PM, MAX_PM, RATING, DEVIATION.
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- No authorization check (#NOT_REQUIRED).
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# 5. Business rules
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1. Show one row for each station that has at least one reading. Do not show a
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station without readings.
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2. STATION_NAME is the name of the station.
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3. READING_COUNT is the number of readings of the station.
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4. AVG_PM is the average PM_VALUE of the readings of the station, with 1 decimal
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place.
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5. MAX_PM is the highest PM_VALUE of the station.
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6. RATING is the class of the station:
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- 'HIGH' if MAX_PM is greater than LIMIT_PM,
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- 'MEDIUM' if MAX_PM is greater than 80 percent of LIMIT_PM,
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- 'LOW' in all other cases.
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7. DEVIATION is the distance between MAX_PM and LIMIT_PM, as a positive number.
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# 6. Constraints
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- Release target: 8.16.
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- Coding standards: Clean ABAP. No ATC priority 1 or priority 2 findings.
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- Out of scope: do not change {{P}}STATION and {{P}}READING.
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# 7. Acceptance
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- The view is active and has no syntax error.
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- The hidden tests pass.
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- Write ABAP Unit tests with CL_CDS_TEST_ENVIRONMENT in a global test class.
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