potiuk commented on issue #4488: [AIRFLOW-3678] Fixes 'airflow resetdb' for 
initialized Postgres DB
URL: https://github.com/apache/airflow/pull/4488#issuecomment-453678575
 
 
   I am happy to remove dag_stat tables from historical migrations if this is 
fine for everyone :). Please let me know that it's ok for you (now after 
Microsoft^H^H^H^H^H^H^H^H^HGithub is back operating normally)
   
   BTW. You might also be interested that I also wanted to solve this problem 
because I am working on a Proof-Of-Concept to implement Google Cloud Spanner 
python dbapi + sqlalchemy Spanner driver + alembic Spanner Implementation 
(minimal implementation so that Airflow can use Spanner as meta-data backend).
   
   I have already reached the state that I can run "initdb" of Airflow's 
migrations and I get pretty much full schema of airflow created in Spanner. 
Here is the POC code: 
https://github.com/PolideaInternal/airflow/commits/SQLALCHEMY (with a few small 
workarounds/fixes). I should have basic working Airflow on Spanner (without 
Kubernetes support yet as the Kubernetes tables are using some features not 
supported by Spanner) in a matter of days rather than weeks now.

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