ddadmin
cfd20328d6
- Зачем: - текущая реализация ODS batch_id теряла данные транзакционных таблиц, если между запусками ODS STG успевал отработать дважды (брался только последний батч). - Что: - изменены скрипты загрузки транзакционных таблиц (bookings, tickets, flights, segments, boarding_passes) для использования паттерна HWM по _load_ts вместо фильтрации по конкретному батчу. - обновлен комментарий в DAG bookings_to_gp_ods, объясняющий разное поведение для справочников и транзакционных данных. - сохранено использование оригинального batch_id из STG для поля _load_id в слое ODS для сквозного трассирования. - Проверка: - запуск пайплайнов и проверка, что все батчи загружаются из STG в ODS без потерь.
82 lines
2.7 KiB
SQL
82 lines
2.7 KiB
SQL
-- Загрузка ODS по boarding_passes: SCD1 (UPDATE изменившихся + INSERT новых).
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-- Statement 1: UPDATE существующих строк.
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WITH src AS (
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SELECT
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s.ticket_no,
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NULLIF(s.flight_id, '')::INTEGER AS flight_id,
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s.seat_no,
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NULLIF(s.boarding_no, '')::INTEGER AS boarding_no,
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NULLIF(s.boarding_time, '')::TIMESTAMP WITH TIME ZONE AS boarding_time,
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s.src_created_at_ts AS event_ts,
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ROW_NUMBER() OVER (
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PARTITION BY s.ticket_no, s.flight_id
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ORDER BY s.src_created_at_ts DESC NULLS LAST, s.load_dttm DESC
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) AS rn
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FROM stg.boarding_passes AS s
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WHERE s.load_dttm > (SELECT COALESCE(MAX(_load_ts), '1900-01-01 00:00:00'::TIMESTAMP) FROM ods.boarding_passes)
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)
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UPDATE ods.boarding_passes AS o
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SET seat_no = s.seat_no,
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boarding_no = s.boarding_no,
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boarding_time = s.boarding_time,
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event_ts = s.event_ts,
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_load_id = '{{ ti.xcom_pull(task_ids="resolve_stg_batch_id") }}'::text,
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_load_ts = now()
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FROM src AS s
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WHERE s.rn = 1
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AND o.ticket_no = s.ticket_no
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AND o.flight_id = s.flight_id
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AND (
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o.seat_no IS DISTINCT FROM s.seat_no
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OR o.boarding_no IS DISTINCT FROM s.boarding_no
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OR o.boarding_time IS DISTINCT FROM s.boarding_time
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OR o.event_ts IS DISTINCT FROM s.event_ts
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);
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-- Statement 2: INSERT новых строк.
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WITH src AS (
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SELECT
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s.ticket_no,
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NULLIF(s.flight_id, '')::INTEGER AS flight_id,
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s.seat_no,
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NULLIF(s.boarding_no, '')::INTEGER AS boarding_no,
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NULLIF(s.boarding_time, '')::TIMESTAMP WITH TIME ZONE AS boarding_time,
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s.src_created_at_ts AS event_ts,
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ROW_NUMBER() OVER (
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PARTITION BY s.ticket_no, s.flight_id
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ORDER BY s.src_created_at_ts DESC NULLS LAST, s.load_dttm DESC
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) AS rn
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FROM stg.boarding_passes AS s
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WHERE s.load_dttm > (SELECT COALESCE(MAX(_load_ts), '1900-01-01 00:00:00'::TIMESTAMP) FROM ods.boarding_passes)
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)
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INSERT INTO ods.boarding_passes (
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ticket_no,
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flight_id,
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seat_no,
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boarding_no,
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boarding_time,
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event_ts,
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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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s.ticket_no,
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s.flight_id,
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s.seat_no,
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s.boarding_no,
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s.boarding_time,
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s.event_ts,
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s.batch_id,
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now()
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FROM src AS s
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WHERE s.rn = 1
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AND NOT EXISTS (
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SELECT 1
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FROM ods.boarding_passes AS o
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WHERE o.ticket_no = s.ticket_no
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AND o.flight_id = s.flight_id
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);
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ANALYZE ods.boarding_passes;
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