mik-laj commented on a change in pull request #8051: [AIRFLOW-7045] Update SQL
query to delete RenderedTaskInstanceFields
URL: https://github.com/apache/airflow/pull/8051#discussion_r402035176
##########
File path: airflow/models/renderedtifields.py
##########
@@ -110,28 +110,20 @@ def delete_old_records(
return
# Fetch Top X records given dag_id & task_id ordered by Execution Date
- subq1 = (
+ tis_to_keep = (
session
.query(cls.dag_id, cls.task_id, cls.execution_date)
.filter(cls.dag_id == dag_id, cls.task_id == task_id)
.order_by(cls.execution_date.desc())
.limit(num_to_keep)
- .subquery('subq1')
- )
-
- # Second Subquery
- # Workaround for MySQL Limitation
(https://stackoverflow.com/a/19344141/5691525)
- # Limitation: This version of MySQL does not yet support
- # LIMIT & IN/ALL/ANY/SOME subquery
- subq2 = (
- session
- .query(subq1.c.dag_id, subq1.c.task_id, subq1.c.execution_date)
- .subquery('subq2')
- )
+ ).all()
+
+ filter_tis = [not_(and_(
+ cls.dag_id == ti.dag_id,
+ cls.task_id == ti.task_id,
+ cls.execution_date == ti.execution_date
+ )) for ti in tis_to_keep]
Review comment:
Och. Right.
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