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refactor(db): using moving average for room history

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History is now a moving average over 5min by slice of 1min

Assisted-by: Junie:gemini-3-flash
Signed-off-by: Klagarge <remi@heredero.ch>
This commit is contained in:
Rémi Heredero
2026-05-30 21:40:35 +02:00
parent 53fbc87af6
commit be5772e488
1 changed files with 20 additions and 10 deletions
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30
db/src/rest/rest.go
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@@ -450,18 +450,28 @@ func (g *RestGateway) getRoomHistory(c *gin.Context) {
nodeFilter := buildNodeFilter(nodes)
query := fmt.Sprintf(`
WITH binned AS (
SELECT
date_bin(INTERVAL '1 minute', time)::TIMESTAMP AS time,
AVG(co2_ppm) AS co2_ppm,
AVG(temp) AS temp,
AVG(humidity) AS humidity,
MAX(window_open) AS window_open
FROM "%s"
WHERE time > now() - INTERVAL '%s' - INTERVAL '5 minutes'
AND %s
GROUP BY date_bin(INTERVAL '1 minute', time)
)
SELECT
date_bin(INTERVAL '5 minutes', time)::TIMESTAMP AS time,
ROUND(AVG(co2_ppm)) AS co2_ppm,
ROUND(AVG(temp), 2) AS temp,
ROUND(AVG(humidity), 2) AS humidity,
MAX(window_open) AS window_open
FROM "%s"
WHERE time > now() - INTERVAL '%s'
AND %s
GROUP BY date_bin(INTERVAL '5 minutes', time)
time,
ROUND(AVG(co2_ppm) OVER (ORDER BY time RANGE BETWEEN INTERVAL '4 minutes' PRECEDING AND CURRENT ROW)) AS co2_ppm,
ROUND(AVG(temp) OVER (ORDER BY time RANGE BETWEEN INTERVAL '4 minutes' PRECEDING AND CURRENT ROW), 2) AS temp,
ROUND(AVG(humidity) OVER (ORDER BY time RANGE BETWEEN INTERVAL '4 minutes' PRECEDING AND CURRENT ROW), 2) AS humidity,
window_open
FROM binned
WHERE time > now() - INTERVAL '%s'
ORDER BY time ASC
`, g.measurementName, window, nodeFilter,
`, g.measurementName, window, nodeFilter, window,
)
// Using context.Background() as seen in working snippet