ddadmin
e592b35461
- Зачем: - подготовлен учебный Star Schema слой для перехода от ODS к аналитике и витринам. - Что: - добавлены 21 SQL-файл для DDS (DDL/LOAD/DQ) с SCD1/SCD2 и фактом `fact_flight_sales`. - добавлены DAG `bookings_dds_ddl` и `bookings_to_gp_dds`, а также smoke-тесты структуры DAG. - обновлены `sql/ddl_gp.sql` и документация (`README`, `docs/*`, `db_schema`) под поток `stg -> ods -> dds`. - Проверка: - make test.
93 lines
2.2 KiB
SQL
93 lines
2.2 KiB
SQL
-- Загрузка DDS dim_airplanes: SCD1 UPSERT (UPDATE изменившихся + INSERT новых).
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-- Statement 1: UPDATE существующих записей (если атрибуты изменились).
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WITH seats_agg AS (
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SELECT
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s.airplane_code,
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COUNT(*)::INTEGER AS total_seats
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FROM ods.seats AS s
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GROUP BY s.airplane_code
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),
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src AS (
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SELECT
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a.airplane_code,
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a.model,
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a.range_km,
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a.speed_kmh,
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COALESCE(sa.total_seats, 0) AS total_seats
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FROM ods.airplanes AS a
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LEFT JOIN seats_agg AS sa
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ON sa.airplane_code = a.airplane_code
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)
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UPDATE dds.dim_airplanes AS d
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SET model = s.model,
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range_km = s.range_km,
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speed_kmh = s.speed_kmh,
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total_seats = s.total_seats,
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updated_at = now(),
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_load_id = '{{ run_id }}',
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_load_ts = now()
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FROM src AS s
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WHERE d.airplane_bk = s.airplane_code
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AND (
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d.model IS DISTINCT FROM s.model
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OR d.range_km IS DISTINCT FROM s.range_km
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OR d.speed_kmh IS DISTINCT FROM s.speed_kmh
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OR d.total_seats IS DISTINCT FROM s.total_seats
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);
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-- Statement 2: INSERT новых записей (MAX(sk) + ROW_NUMBER()).
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WITH seats_agg AS (
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SELECT
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s.airplane_code,
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COUNT(*)::INTEGER AS total_seats
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FROM ods.seats AS s
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GROUP BY s.airplane_code
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),
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src AS (
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SELECT
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a.airplane_code,
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a.model,
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a.range_km,
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a.speed_kmh,
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COALESCE(sa.total_seats, 0) AS total_seats
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FROM ods.airplanes AS a
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LEFT JOIN seats_agg AS sa
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ON sa.airplane_code = a.airplane_code
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),
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max_sk AS (
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SELECT COALESCE(MAX(airplane_sk), 0) AS v
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FROM dds.dim_airplanes
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)
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INSERT INTO dds.dim_airplanes (
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airplane_sk,
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airplane_bk,
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model,
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range_km,
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speed_kmh,
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total_seats,
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created_at,
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updated_at,
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_load_id,
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_load_ts
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)
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SELECT
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(SELECT v FROM max_sk) + ROW_NUMBER() OVER (ORDER BY s.airplane_code)::INTEGER,
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s.airplane_code,
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s.model,
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s.range_km,
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s.speed_kmh,
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s.total_seats,
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now(),
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now(),
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'{{ run_id }}',
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now()
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FROM src AS s
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WHERE NOT EXISTS (
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SELECT 1
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FROM dds.dim_airplanes AS d
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WHERE d.airplane_bk = s.airplane_code
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);
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ANALYZE dds.dim_airplanes;
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