Fix N+1 queries in trigger asset event submission#65367
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Hi @ashb Could I get your review when you get a chance? Thanks in advance! |
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LGTM overall, I verify the select chain as well. Nice catch, left small nits regarding the test cases.
I will merge this for 3.3.1.
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Why
When a trigger submits an event for watched assets, Airflow needs to load the trigger's asset watchers and their related assets before registering asset changes. These relationships were previously loaded lazily, so a trigger watching multiple assets could issue extra queries per asset during event submission.
This adds unnecessary database overhead in the Triggerer path and can scale poorly for triggers that notify many assets. Loading the asset watcher graph up front keeps event submission query usage stable as the number of watched assets grows.
Was generative AI tooling used to co-author this PR?
{pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.Important
🛠️ Maintainer triage note for @henry3260 · by
@potiuk· 2026-06-18 13:57 UTCPaused pending your next update — this PR has been inactive for ~41 days, so it's been moved to draft to keep the review queue clear:
main, address any new failures, and mark it Ready for review when you pick it back up — no rush.The ball is in your court — you've been assigned to this PR.
Automated triage — may be imperfect; a maintainer takes the next look.