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fix get latest serialized_dag model query to prevent "Out of sort memory" error #55589

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Merged
potiuk merged 3 commits into from
Oct 22, 2025
Merged

fix get latest serialized_dag model query to prevent "Out of sort memory" error #55589

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be62de9
fix get latest serialized_dag model query
wjddn279 Sep 12, 2025
0454907
fix get latest serialized_dag model query
wjddn279 Sep 12, 2025
9a4a7b4
add db type check logic
wjddn279 Oct 22, 2025
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9 changes: 9 additions & 0 deletions airflow-core/src/airflow/models/serialized_dag.py
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Original file line number Diff line number Diff line change
Expand Up @@ -461,6 +461,15 @@ def write_dag(

@classmethod
def latest_item_select_object(cls, dag_id):
from airflow.settings import engine

if engine.dialect.name == "mysql":
# Prevent "Out of sort memory" caused by large values in cls.data column for MySQL.
# Details in https://github.com/apache/airflow/pull/55589
latest_item_id = (
select(cls.id).where(cls.dag_id == dag_id).order_by(cls.created_at.desc()).limit(1)
)
return select(cls).where(cls.id == latest_item_id)
return select(cls).where(cls.dag_id == dag_id).order_by(cls.created_at.desc()).limit(1)

@classmethod
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