ddadmin
85fea19818
- Зачем: - подготовлена учебная реализация ODS слоя с типизацией, UPSERT и DQ, чтобы продолжить работу от STG к DDS/DM. - Что: - добавлены SQL-скрипты `sql/ods/*_ddl.sql`, `sql/ods/*_load.sql`, `sql/ods/*_dq.sql` для 9 сущностей bookings. - добавлены DAG `bookings_ods_ddl` и `bookings_to_gp_ods`, а также smoke-тесты для новых графов. - ODS DDL интегрирован в `sql/ddl_gp.sql`; документация и план обновлены под единый запуск через `make ddl-gp`. - Проверка: - `make test`. - `make ddl-gp`.
105 lines
2.9 KiB
SQL
105 lines
2.9 KiB
SQL
-- Загрузка ODS по airports: 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.airport_code,
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s.airport_name,
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s.city,
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s.country,
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s.coordinates,
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s.timezone,
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ROW_NUMBER() OVER (
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PARTITION BY s.airport_code
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ORDER BY s.load_dttm DESC, s.src_created_at_ts DESC NULLS LAST
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) AS rn
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FROM stg.airports AS s
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WHERE s.batch_id = '{{ ti.xcom_pull(task_ids="resolve_stg_batch_id") }}'::text
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)
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UPDATE ods.airports AS o
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SET airport_name = s.airport_name,
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city = s.city,
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country = s.country,
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coordinates = s.coordinates,
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timezone = s.timezone,
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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.airport_code = s.airport_code
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AND (
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o.airport_name IS DISTINCT FROM s.airport_name
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OR o.city IS DISTINCT FROM s.city
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OR o.country IS DISTINCT FROM s.country
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OR o.coordinates IS DISTINCT FROM s.coordinates
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OR o.timezone IS DISTINCT FROM s.timezone
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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.airport_code,
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s.airport_name,
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s.city,
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s.country,
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s.coordinates,
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s.timezone,
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ROW_NUMBER() OVER (
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PARTITION BY s.airport_code
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ORDER BY s.load_dttm DESC, s.src_created_at_ts DESC NULLS LAST
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) AS rn
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FROM stg.airports AS s
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WHERE s.batch_id = '{{ ti.xcom_pull(task_ids="resolve_stg_batch_id") }}'::text
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)
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INSERT INTO ods.airports (
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airport_code,
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airport_name,
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city,
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country,
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coordinates,
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timezone,
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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.airport_code,
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s.airport_name,
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s.city,
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s.country,
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s.coordinates,
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s.timezone,
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'{{ ti.xcom_pull(task_ids="resolve_stg_batch_id") }}'::text,
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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.airports AS o
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WHERE o.airport_code = s.airport_code
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);
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-- Statement 3: DELETE ключей, которых нет в snapshot текущего батча.
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-- Это делает ODS для справочника действительно "current state".
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WITH src_keys AS (
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SELECT d.airport_code
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FROM (
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SELECT
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s.airport_code,
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ROW_NUMBER() OVER (
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PARTITION BY s.airport_code
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ORDER BY s.load_dttm DESC, s.src_created_at_ts DESC NULLS LAST
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) AS rn
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FROM stg.airports AS s
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WHERE s.batch_id = '{{ ti.xcom_pull(task_ids="resolve_stg_batch_id") }}'::text
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) AS d
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WHERE d.rn = 1
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)
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DELETE FROM ods.airports AS o
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WHERE NOT EXISTS (
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SELECT 1
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FROM src_keys AS s
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WHERE s.airport_code = o.airport_code
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);
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ANALYZE ods.airports;
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