potiuk opened a new issue, #33375:
URL: https://github.com/apache/airflow/issues/33375

   ### Discussed in https://github.com/apache/airflow/discussions/33345
   
   <div type='discussions-op-text'>
   
   <sup>Originally posted by **vuphamcs** August 11, 2023</sup>
   ### Description
   
   Is there a variable similar to `prev_start_date_success` but for the 
previous DAG run’s completion date? The value I’m hoping to retrieve to use 
within the next DAG run is `2023-08-10 16:04:30`
   
   
![image](https://github.com/apache/airflow/assets/1600760/9e2af349-4c3e-47e1-8a1a-9d8827b56f57)
   
   
   ### Use case/motivation
   
   One particular use case is to help guarantee that the next DAG run only 
queries data that was inserted during the existing DAG run, and not the past 
DAG run.
   
   ```python
   prev_ts = context['prev_end_date_success']
   
   sql = f"SELECT * FROM results WHERE created_at > 
{context['prev_end_date_success']}"
   ```
   
   ### Related issues
   
   _No response_
   
   ### Are you willing to submit a PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
   </div>


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