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.
83 lines
2.2 KiB
SQL
83 lines
2.2 KiB
SQL
-- Загрузка DDS dim_passengers: SCD1 UPSERT (UPDATE изменившихся + INSERT новых).
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-- Statement 1: UPDATE существующих записей (если атрибуты изменились).
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WITH src AS (
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SELECT
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d.passenger_id,
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d.passenger_name
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FROM (
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SELECT
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t.passenger_id,
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t.passenger_name,
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ROW_NUMBER() OVER (
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PARTITION BY t.passenger_id
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ORDER BY t.event_ts DESC NULLS LAST, t._load_ts DESC, t.ticket_no DESC
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) AS rn
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FROM ods.tickets AS t
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WHERE t.passenger_id IS NOT NULL
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AND t.passenger_id <> ''
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AND t.passenger_name IS NOT NULL
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AND t.passenger_name <> ''
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) AS d
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WHERE d.rn = 1
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)
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UPDATE dds.dim_passengers AS d
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SET passenger_name = s.passenger_name,
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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.passenger_bk = s.passenger_id
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AND d.passenger_name IS DISTINCT FROM s.passenger_name;
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-- Statement 2: INSERT новых записей (MAX(sk) + ROW_NUMBER()).
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WITH src AS (
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SELECT
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d.passenger_id,
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d.passenger_name
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FROM (
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SELECT
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t.passenger_id,
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t.passenger_name,
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ROW_NUMBER() OVER (
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PARTITION BY t.passenger_id
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ORDER BY t.event_ts DESC NULLS LAST, t._load_ts DESC, t.ticket_no DESC
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) AS rn
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FROM ods.tickets AS t
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WHERE t.passenger_id IS NOT NULL
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AND t.passenger_id <> ''
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AND t.passenger_name IS NOT NULL
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AND t.passenger_name <> ''
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) AS d
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WHERE d.rn = 1
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),
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max_sk AS (
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SELECT COALESCE(MAX(passenger_sk), 0) AS v
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FROM dds.dim_passengers
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)
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INSERT INTO dds.dim_passengers (
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passenger_sk,
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passenger_bk,
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passenger_name,
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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.passenger_id)::INTEGER,
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s.passenger_id,
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s.passenger_name,
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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_passengers AS d
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WHERE d.passenger_bk = s.passenger_id
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);
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ANALYZE dds.dim_passengers;
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