Fix backfill validate n plus one#66313
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Signed-off-by: ColtenOuO <jun930436@gmail.com>
Signed-off-by: ColtenOuO <jun930436@gmail.com>
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Summary
A new helper
_fetch_latest_dag_runs_for_infospre-loads allDagRuns the loop will need into adict, replacing the per-infoSELECTinside the loop with an in-memory lookup. This collapsesNdatabase round-trips into one batchedSELECTplusNdict reads.Per @jason810496's review on #66222, a regression test (
test_create_backfill_does_not_re_query_each_info) usesassert_queries_countto lock in the post-fix query count.Impact
DagRunInfo).Verification
airflow-core/tests/unit/models/test_backfill.py.airflow-core/tests/unit/api_fastapi/core_api/routes/public/test_backfills.py.Was generative AI tooling used to co-author this PR?
Generated-by: Claude Code following the guidelines