[GitHub] [airflow] turbaszek commented on a change in pull request #11484: Add reset_dag_run option on dagrun_operator to clear existing dag run

[GitBox <gi...@apache.org>]

turbaszek commented on a change in pull request #11484:
URL: https://github.com/apache/airflow/pull/11484#discussion_r503577112



##########
File path: airflow/operators/dagrun_operator.py
##########
@@ -92,11 +97,39 @@ def execute(self, context: Dict):
             execution_date = timezone.utcnow()
 
         run_id = DagRun.generate_run_id(DagRunType.MANUAL, execution_date)
-        # Ignore MyPy type for self.execution_date because it doesn't pick up the timezone.parse() for strings
-        trigger_dag(
-            dag_id=self.trigger_dag_id,
-            run_id=run_id,
-            conf=self.conf,
-            execution_date=self.execution_date,
-            replace_microseconds=False,
-        )
+        try:
+            # Ignore MyPy type for self.execution_date because it doesn't pick up the timezone.parse() for strings
+            trigger_dag(
+                dag_id=self.trigger_dag_id,
+                run_id=run_id,
+                conf=self.conf,
+                execution_date=self.execution_date,
+                replace_microseconds=False,
+            )
+
+        except DagRunAlreadyExists as e:
+            if self.reset_dag_run:
+                self.log.info(f"Clearing {self.trigger_dag_id} on {self.execution_date}")

Review comment:
       ```suggestion
                   self.log.info("Clearing %s on %s", self.trigger_dag_id, self.execution_date)
   ```




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