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fix(coderd/database): improve perf of GetTemplateInsightsByInterval (#12773)

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Refs #12122
This commit is contained in:
Mathias Fredriksson
2024-03-27 14:10:46 +02:00
committed by GitHub
parent ba1eaceda4
commit 47fd190064
2 changed files with 26 additions and 18 deletions
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22
coderd/database/queries/insights.sql
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@ -355,7 +355,7 @@ WITH
CROSS JOIN
generate_series(
date_trunc('minute', was.session_started_at),
-- Subtract 1 microsecond to avoid creating an extra series.
-- Subtract 1 μs to avoid creating an extra series.
date_trunc('minute', was.session_ended_at - '1 microsecond'::interval),
'1 minute'::interval
) AS s(minute_bucket)
@ -389,14 +389,17 @@ WITH
ts AS (
SELECT
d::timestamptz AS from_,
CASE
WHEN (d::timestamptz + (@interval_days::int || ' day')::interval) <= @end_time::timestamptz
THEN (d::timestamptz + (@interval_days::int || ' day')::interval)
ELSE @end_time::timestamptz
END AS to_
LEAST(
(d::timestamptz + (@interval_days::int || ' day')::interval)::timestamptz,
@end_time::timestamptz
)::timestamptz AS to_
FROM
-- Subtract 1 microsecond from end_time to avoid including the next interval in the results.
generate_series(@start_time::timestamptz, (@end_time::timestamptz) - '1 microsecond'::interval, (@interval_days::int || ' day')::interval) AS d
generate_series(
@start_time::timestamptz,
-- Subtract 1 μs to avoid creating an extra series.
(@end_time::timestamptz) - '1 microsecond'::interval,
(@interval_days::int || ' day')::interval
) AS d
)
SELECT
@ -410,6 +413,7 @@ LEFT JOIN
template_usage_stats AS tus
ON
tus.start_time >= ts.from_
AND tus.start_time < ts.to_ -- End time exclusion criteria optimization for index.
AND tus.end_time <= ts.to_
AND CASE WHEN COALESCE(array_length(@template_ids::uuid[], 1), 0) > 0 THEN tus.template_id = ANY(@template_ids::uuid[]) ELSE TRUE END
GROUP BY
@ -473,7 +477,7 @@ WITH
CROSS JOIN
generate_series(
date_trunc('minute', was.session_started_at),
-- Subtract 1 microsecond to avoid creating an extra series.
-- Subtract 1 μs to avoid creating an extra series.
date_trunc('minute', was.session_ended_at - '1 microsecond'::interval),
'1 minute'::interval
) AS s(minute_bucket)