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adjusted presence duration calculation

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Dona Maria Absi
2025-04-07 14:24:21 +03:00
parent b36c12c046
commit 7a9b3efdd8
1 changed files with 85 additions and 91 deletions
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176
fact_daily_space_presence_duration/fact_daily_space_presence_duration.sql
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@ -1,97 +1,91 @@
-- Step 1: Get device presence events with previous timestamps
WITH start_date AS (
SELECT
device.uuid AS device_id,
device.space_device_uuid AS space_id,
"device-status-log".value,
CASE
WHEN "device-status-log".value = 'none' THEN 1
ELSE 0
END AS none_flag,
"device-status-log".event_time::timestamp AS event_time,
LAG("device-status-log".event_time::timestamp)
OVER (PARTITION BY device.uuid
ORDER BY "device-status-log".event_time) AS prev_timestamp,
LAG(
CASE
WHEN "device-status-log".value = 'none' THEN 1
ELSE 0
END
) OVER (PARTITION BY device.uuid
ORDER BY "device-status-log".event_time) AS prev_none_flag
FROM device
LEFT JOIN "device-status-log"
ON device.uuid = "device-status-log".device_id
LEFT JOIN product
ON product.uuid = device.product_device_uuid
WHERE product.cat_name = 'hps'
AND "device-status-log".code = 'presence_state'
ORDER BY device.uuid, "device-status-log".event_time
)
d.uuid AS device_id,
d.space_device_uuid AS space_id,
l.value,
l.event_time::timestamp AS event_time,
LAG(l.event_time::timestamp) OVER (PARTITION BY d.uuid ORDER BY l.event_time) AS prev_timestamp
FROM device d
LEFT JOIN "device-status-log" l
ON d.uuid = l.device_id
LEFT JOIN product p
ON p.uuid = d.product_device_uuid
WHERE p.cat_name = 'hps'
AND l.code = 'presence_state'
),
, time_intervals AS (
SELECT
device_id,
space_id,
prev_none_flag AS none_flag,
prev_timestamp AS start_time,
event_time AS end_time
FROM start_date
WHERE prev_none_flag = 1
)
, overlapping_none_presence AS (
SELECT -- spaces with 2 devices
a.space_id,
GREATEST(a.start_time, b.start_time) AS overlap_start,
LEAST(a.end_time, b.end_time) AS overlap_end,
EXTRACT(EPOCH FROM (LEAST(a.end_time, b.end_time) - GREATEST(a.start_time, b.start_time))) AS overlap_duration_seconds
FROM time_intervals a
LEFT JOIN time_intervals b
ON a.space_id = b.space_id
AND a.device_id <> b.device_id
AND a.start_time < b.end_time
AND b.start_time < a.end_time
UNION
select --spaces with 1 device
a.space_id,
a.start_time AS overlap_start,
a.end_time AS overlap_end,
EXTRACT(EPOCH FROM (a.end_time - a.start_time)) AS overlap_duration_seconds
FROM time_intervals a
WHERE NOT EXISTS (
SELECT 1
FROM time_intervals b
WHERE a.space_id = b.space_id
AND a.device_id <> b.device_id
)
)
, expanded_overlapping_none_presence AS (
SELECT distinct
o.space_id,
gs.date AS missing_date,
CASE
WHEN DATE(o.overlap_start) <> DATE(o.overlap_end) THEN 86400
ELSE EXTRACT(EPOCH FROM (LEAST(o.overlap_end, gs.date + INTERVAL '1 day') - GREATEST(o.overlap_start, gs.date)))
END AS missing_seconds
FROM overlapping_none_presence o
CROSS JOIN LATERAL generate_series(DATE(o.overlap_start), DATE(o.overlap_end) - INTERVAL '1 day', '1 day') AS gs(date)
)
, daily_total_occupancy AS (
-- Step 2: Identify periods when device reports "none"
device_none_periods AS (
SELECT
t.space_id,
DATE(t.start_time) AS occupancy_date,
GREATEST(0, LEAST(86400, SUM(EXTRACT(EPOCH FROM (t.end_time - t.start_time))) -
COALESCE(SUM(e.missing_seconds), 0))) AS total_presence_seconds,
TO_CHAR(INTERVAL '1 second' * GREATEST(0, LEAST(86400, SUM(EXTRACT(EPOCH FROM (t.end_time - t.start_time))) -
COALESCE(SUM(e.missing_seconds), 0))), 'HH24:MI:SS') AS total_presence_formatted
FROM time_intervals t
LEFT JOIN expanded_overlapping_none_presence e
ON t.space_id = e.space_id
AND DATE(t.start_time) = e.missing_date
GROUP BY 1,2
space_id,
device_id,
event_time AS empty_from,
LEAD(event_time) OVER (PARTITION BY device_id ORDER BY event_time) AS empty_until
FROM start_date
WHERE value = 'none'
),
-- Step 3: Clip the "none" periods to the edges of each day
clipped_device_none_periods AS (
SELECT
space_id,
GREATEST(empty_from, DATE_TRUNC('day', empty_from)) AS clipped_from,
LEAST(empty_until, DATE_TRUNC('day', empty_until) + INTERVAL '1 day') AS clipped_until
FROM device_none_periods
WHERE empty_until IS NOT NULL
),
-- Step 4: Break multi-day periods into daily intervals
generated_daily_intervals AS (
SELECT
space_id,
gs::date AS day,
GREATEST(clipped_from, gs) AS interval_start,
LEAST(clipped_until, gs + INTERVAL '1 day') AS interval_end
FROM clipped_device_none_periods,
LATERAL generate_series(DATE_TRUNC('day', clipped_from), DATE_TRUNC('day', clipped_until), INTERVAL '1 day') AS gs
),
-- Step 5: Merge overlapping or adjacent intervals per day
merged_intervals AS (
SELECT
space_id,
day,
interval_start,
interval_end
FROM (
SELECT
space_id,
day,
interval_start,
interval_end,
LAG(interval_end) OVER (PARTITION BY space_id, day ORDER BY interval_start) AS prev_end
FROM generated_daily_intervals
) sub
WHERE prev_end IS NULL OR interval_start > prev_end
),
-- Step 6: Sum up total missing seconds (device reported "none") per day
missing_seconds_per_day AS (
SELECT
space_id,
day AS missing_date,
SUM(EXTRACT(EPOCH FROM (interval_end - interval_start))) AS total_missing_seconds
FROM merged_intervals
GROUP BY space_id, day
),
-- Step 7: Calculate total occupied time per day (86400 - missing)
occupied_seconds_per_day AS (
SELECT
space_id,
missing_date,
86400 - total_missing_seconds AS total_occupied_seconds
FROM missing_seconds_per_day
)
SELECT * FROM daily_total_occupancy
-- Final Output
SELECT *
FROM occupied_seconds_per_day
ORDER BY 1,2;