ddadmin
6bbb26b9b3
Add batch ETL pipeline with ODS→DDS→DM transformation jobs and scripts. Create DDL infrastructure with automated database schema application. Update Makefile with transform target for executing batch processes. Rewrite README with complete Russian documentation including architecture diagrams, quick start guide, and data flow visualization.
73 lines
2.6 KiB
SQL
73 lines
2.6 KiB
SQL
-- Batch transformation: DDS → DM materialized tables
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-- For demo we use VIEWs mainly, but here we can materialize heavy aggregations
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-- Materialized daily traffic (if needed for performance)
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-- Uncomment if VIEW dm.v_daily_traffic becomes too slow
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/*
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CREATE TABLE IF NOT EXISTS dm.daily_traffic_mart
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(
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event_date Date,
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geo_country LowCardinality(Nullable(String)),
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device_type LowCardinality(Nullable(String)),
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browser_name LowCardinality(Nullable(String)),
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utm_source LowCardinality(Nullable(String)),
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utm_medium LowCardinality(Nullable(String)),
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events UInt64,
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uniq_clicks UInt64,
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uniq_users UInt64
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)
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ENGINE = ReplacingMergeTree(event_date)
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PARTITION BY toYYYYMM(event_date)
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ORDER BY (event_date, geo_country, device_type, browser_name, utm_source, utm_medium);
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TRUNCATE TABLE dm.daily_traffic_mart;
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INSERT INTO dm.daily_traffic_mart
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SELECT * FROM dm.v_daily_traffic;
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*/
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-- Data Quality summary table (always fresh)
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CREATE TABLE IF NOT EXISTS dm.dq_summary
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(
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check_date Date,
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layer LowCardinality(String),
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table_name LowCardinality(String),
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check_name LowCardinality(String),
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check_value UInt64
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)
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ENGINE = MergeTree
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PARTITION BY toYYYYMM(check_date)
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ORDER BY (check_date, layer, table_name, check_name);
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-- Truncate and refill DQ summary
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INSERT INTO dm.dq_summary
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SELECT
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today() AS check_date,
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'stg' AS layer,
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'browser_raw' AS table_name,
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'total_rows' AS check_name,
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count() AS check_value
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FROM stg.browser_raw
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UNION ALL
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SELECT today(), 'stg', 'location_raw', 'total_rows', count() FROM stg.location_raw
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UNION ALL
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SELECT today(), 'stg', 'device_raw', 'total_rows', count() FROM stg.device_raw
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UNION ALL
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SELECT today(), 'stg', 'geo_raw', 'total_rows', count() FROM stg.geo_raw
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UNION ALL
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SELECT today(), 'ods', 'browser_event', 'total_rows', count() FROM ods.browser_event
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UNION ALL
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SELECT today(), 'ods', 'browser_event', 'rows_with_errors', count() FROM ods.browser_event WHERE length(parse_errors) > 0
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UNION ALL
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SELECT today(), 'ods', 'location_event', 'total_rows', count() FROM ods.location_event
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UNION ALL
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SELECT today(), 'ods', 'device_by_click', 'total_rows', count() FROM ods.device_by_click
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UNION ALL
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SELECT today(), 'ods', 'geo_by_click', 'total_rows', count() FROM ods.geo_by_click
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UNION ALL
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SELECT today(), 'dds', 'event', 'total_rows', count() FROM dds.event
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UNION ALL
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SELECT today(), 'dds', 'click', 'total_rows', count() FROM dds.click
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UNION ALL
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SELECT today(), 'dds', 'event_without_click', 'orphan_events', count() FROM dds.event WHERE click_id IS NOT NULL AND click_id NOT IN (SELECT click_id FROM dds.click);
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