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fix: backfilling lifecycle trends based on new logic (#10476)
Previously lifecycle trends were taking one snapshot per flag, now they take one per flag per stage it moved.
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src/migrations/20250805152422-backfill-lifecycle-trends.js
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91
src/migrations/20250805152422-backfill-lifecycle-trends.js
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exports.up = function (db, cb) {
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db.runSql(
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`
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DELETE FROM lifecycle_trends;
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WITH week_ranges AS (
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SELECT
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to_char(week_start, 'YYYY') || '-' || lpad(extract(week from week_start)::int::text, 2, '0') AS id,
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week_start,
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week_start + INTERVAL '7 days' AS week_end,
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week_start + INTERVAL '7 days' + INTERVAL '1 hour' AS created_at
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FROM (
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SELECT date_trunc('day', now() AT TIME ZONE 'UTC') AS today
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) AS t
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CROSS JOIN LATERAL (
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SELECT generate_series(
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t.today - ((extract(dow from t.today)::int + 7) % 7) * INTERVAL '1 day' - INTERVAL '52 weeks',
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t.today - ((extract(dow from t.today)::int + 7) % 7) * INTERVAL '1 day' - INTERVAL '1 week',
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INTERVAL '1 week'
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) AS week_start
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) AS weeks
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),
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feature_data AS (
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SELECT
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fl.created_at AT TIME ZONE 'UTC' AS lifecycle_time,
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fl.stage,
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f.type AS flag_type,
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f.project,
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fl.feature
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FROM feature_lifecycles fl
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JOIN features f ON f.name = fl.feature
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JOIN projects p ON f.project = p.id
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),
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latest_stage_on_week AS (
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SELECT DISTINCT ON (fl.feature, wr.id)
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wr.id AS week_id,
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fl.feature,
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fl.stage AS stage_on_week,
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fl.created_at
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FROM week_ranges wr
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JOIN feature_lifecycles fl ON fl.created_at <= wr.week_end
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ORDER BY wr.id, fl.feature, fl.created_at DESC
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),
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weekly_counts AS (
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SELECT
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wr.id,
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wr.created_at,
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fd.stage,
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fd.flag_type,
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fd.project,
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COUNT(DISTINCT CASE WHEN fd.lifecycle_time >= wr.week_start AND fd.lifecycle_time < wr.week_end THEN fd.feature END) AS new_flags_this_week,
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COUNT(DISTINCT CASE WHEN fd.lifecycle_time < wr.week_start
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AND lsbw.feature IS NOT NULL
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AND lsbw.stage_on_week = fd.stage
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THEN fd.feature
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END) AS flags_older_than_week
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FROM week_ranges wr
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JOIN feature_data fd ON fd.lifecycle_time < wr.week_end
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LEFT JOIN latest_stage_on_week lsbw ON lsbw.feature = fd.feature AND lsbw.week_id = wr.id
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GROUP BY wr.id, wr.created_at, fd.stage, fd.flag_type, fd.project
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)
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INSERT INTO lifecycle_trends (
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id,
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stage,
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flag_type,
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project,
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flags_older_than_week,
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new_flags_this_week,
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created_at
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)
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SELECT
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id,
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stage,
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flag_type,
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project,
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flags_older_than_week,
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new_flags_this_week,
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created_at
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FROM weekly_counts
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ORDER BY id, project, flag_type, stage;
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`,
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cb,
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);
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};
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exports.down = function (db, cb) {
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db.runSql(
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``,
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cb,
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);
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};
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