ddadmin
d25c753eb4
- 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.
131 lines
3.3 KiB
SQL
131 lines
3.3 KiB
SQL
-- Загрузка DDS dim_routes: SCD2 с hashdiff.
|
||
|
||
-- Statement 1: Закрыть устаревшие версии (valid_to = текущая дата).
|
||
WITH src AS (
|
||
SELECT
|
||
route_no,
|
||
departure_airport,
|
||
arrival_airport,
|
||
airplane_code,
|
||
days_of_week,
|
||
departure_time,
|
||
duration,
|
||
md5(
|
||
COALESCE(departure_airport, '') || '|' ||
|
||
COALESCE(arrival_airport, '') || '|' ||
|
||
COALESCE(airplane_code, '') || '|' ||
|
||
COALESCE(days_of_week, '') || '|' ||
|
||
COALESCE(departure_time::TEXT, '') || '|' ||
|
||
COALESCE(duration::TEXT, '')
|
||
) AS hashdiff,
|
||
ROW_NUMBER() OVER (PARTITION BY route_no ORDER BY validity DESC) AS rn
|
||
FROM ods.routes
|
||
)
|
||
UPDATE dds.dim_routes AS d
|
||
SET valid_to = CURRENT_DATE,
|
||
updated_at = now(),
|
||
_load_id = '{{ run_id }}',
|
||
_load_ts = now()
|
||
FROM src AS s
|
||
WHERE s.rn = 1
|
||
AND d.route_bk = s.route_no
|
||
AND d.valid_to IS NULL
|
||
AND d.hashdiff <> s.hashdiff;
|
||
|
||
-- Statement 1.1: Закрыть "исчезнувшие" маршруты.
|
||
WITH src AS (
|
||
SELECT
|
||
route_no,
|
||
ROW_NUMBER() OVER (PARTITION BY route_no ORDER BY validity DESC) AS rn
|
||
FROM ods.routes
|
||
)
|
||
UPDATE dds.dim_routes AS d
|
||
SET valid_to = CURRENT_DATE,
|
||
updated_at = now(),
|
||
_load_id = '{{ run_id }}',
|
||
_load_ts = now()
|
||
WHERE d.valid_to IS NULL
|
||
AND NOT EXISTS (
|
||
SELECT 1
|
||
FROM src AS s
|
||
WHERE s.rn = 1
|
||
AND s.route_no = d.route_bk
|
||
);
|
||
|
||
-- Statement 2: Вставить новые версии (для изменённых и новых route_no).
|
||
WITH src AS (
|
||
SELECT
|
||
route_no,
|
||
departure_airport,
|
||
arrival_airport,
|
||
airplane_code,
|
||
days_of_week,
|
||
departure_time,
|
||
duration,
|
||
md5(
|
||
COALESCE(departure_airport, '') || '|' ||
|
||
COALESCE(arrival_airport, '') || '|' ||
|
||
COALESCE(airplane_code, '') || '|' ||
|
||
COALESCE(days_of_week, '') || '|' ||
|
||
COALESCE(departure_time::TEXT, '') || '|' ||
|
||
COALESCE(duration::TEXT, '')
|
||
) AS hashdiff,
|
||
ROW_NUMBER() OVER (PARTITION BY route_no ORDER BY validity DESC) AS rn
|
||
FROM ods.routes
|
||
),
|
||
max_sk AS (
|
||
SELECT COALESCE(MAX(route_sk), 0) AS v
|
||
FROM dds.dim_routes
|
||
)
|
||
INSERT INTO dds.dim_routes (
|
||
route_sk,
|
||
route_bk,
|
||
departure_airport,
|
||
arrival_airport,
|
||
airplane_code,
|
||
days_of_week,
|
||
departure_time,
|
||
duration,
|
||
hashdiff,
|
||
valid_from,
|
||
valid_to,
|
||
created_at,
|
||
updated_at,
|
||
_load_id,
|
||
_load_ts
|
||
)
|
||
SELECT
|
||
(SELECT v FROM max_sk) + ROW_NUMBER() OVER (ORDER BY s.route_no)::INTEGER,
|
||
s.route_no,
|
||
s.departure_airport,
|
||
s.arrival_airport,
|
||
s.airplane_code,
|
||
s.days_of_week,
|
||
s.departure_time,
|
||
s.duration,
|
||
s.hashdiff,
|
||
CASE
|
||
WHEN EXISTS (
|
||
SELECT 1
|
||
FROM dds.dim_routes AS d2
|
||
WHERE d2.route_bk = s.route_no
|
||
) THEN CURRENT_DATE
|
||
ELSE '1900-01-01'::DATE
|
||
END AS valid_from,
|
||
NULL,
|
||
now(),
|
||
now(),
|
||
'{{ run_id }}',
|
||
now()
|
||
FROM src AS s
|
||
WHERE s.rn = 1
|
||
AND NOT EXISTS (
|
||
SELECT 1
|
||
FROM dds.dim_routes AS d
|
||
WHERE d.route_bk = s.route_no
|
||
AND d.valid_to IS NULL
|
||
AND d.hashdiff = s.hashdiff
|
||
);
|
||
|
||
ANALYZE dds.dim_routes;
|