ashb commented on code in PR #51952:
URL: https://github.com/apache/airflow/pull/51952#discussion_r2162027140


##########
airflow-core/src/airflow/utils/db_cleanup.py:
##########
@@ -104,29 +106,53 @@ def readable_config(self):
 
 config_list: list[_TableConfig] = [
     _TableConfig(table_name="job", recency_column_name="latest_heartbeat"),
-    _TableConfig(table_name="dag", recency_column_name="last_parsed_time"),
+    _TableConfig(
+        table_name="dag",
+        recency_column_name="last_parsed_time",
+        dependent_tables=[
+            "task_reschedule",
+            "task_instance_history",
+            "xcom",
+            "task_instance",
+            "dag_run",
+            "dag_version",
+        ],
+    ),
     _TableConfig(
         table_name="dag_run",
         recency_column_name="start_date",
         extra_columns=["dag_id", "run_type"],
         keep_last=True,
         keep_last_filters=[column("run_type") != DagRunType.MANUAL],
         keep_last_group_by=["dag_id"],
+        dependent_tables=["xcom", "task_reschedule", "task_instance_history", 
"task_instance"],
     ),
     _TableConfig(table_name="asset_event", recency_column_name="timestamp"),
     _TableConfig(table_name="import_error", recency_column_name="timestamp"),
     _TableConfig(table_name="log", recency_column_name="dttm"),
     _TableConfig(table_name="sla_miss", recency_column_name="timestamp"),
-    _TableConfig(table_name="task_instance", recency_column_name="start_date"),
+    _TableConfig(
+        table_name="task_instance",
+        recency_column_name="start_date",
+        dependent_tables=["task_instance_history", "xcom", "task_reschedule"],
+    ),
     _TableConfig(table_name="task_instance_history", 
recency_column_name="start_date"),
     _TableConfig(table_name="task_reschedule", 
recency_column_name="start_date"),
     _TableConfig(table_name="xcom", recency_column_name="timestamp"),
     _TableConfig(table_name="_xcom_archive", recency_column_name="timestamp"),
     _TableConfig(table_name="callback_request", 
recency_column_name="created_at"),
     _TableConfig(table_name="celery_taskmeta", 
recency_column_name="date_done"),
     _TableConfig(table_name="celery_tasksetmeta", 
recency_column_name="date_done"),
-    _TableConfig(table_name="trigger", recency_column_name="created_date"),
-    _TableConfig(table_name="dag_version", recency_column_name="created_at"),
+    _TableConfig(
+        table_name="trigger",
+        recency_column_name="created_date",
+        dependent_tables=["task_reschedule", "xcom", "task_instance_history", 
"task_instance"],

Review Comment:
   ```suggestion
           dependent_tables=["xcom", "task_instance_history", "task_instance"],
   ```
   
   
   Task reschedule isn't anything to do with trigger I don't think?



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