[airflow] 05/23: Update upgrading.rst with detailed code example of how to resolve post-upgrade warning (#19993)

[je...@apache.org]

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jedcunningham pushed a commit to branch v2-2-test
in repository https://gitbox.apache.org/repos/asf/airflow.git

commit 03be5a186520d78afb4ac15368594d0e0c7c4468
Author: adaezebestow <87...@users.noreply.github.com>
AuthorDate: Sun Dec 19 12:26:04 2021 -0500

    Update upgrading.rst with detailed code example of how to resolve post-upgrade warning (#19993)
    
    (cherry picked from commit 4ac35d723b73d02875d56bf000aafd2235ef0f4a)
---
 docs/apache-airflow/installation/upgrading.rst | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/docs/apache-airflow/installation/upgrading.rst b/docs/apache-airflow/installation/upgrading.rst
index cd29e32..929c604 100644
--- a/docs/apache-airflow/installation/upgrading.rst
+++ b/docs/apache-airflow/installation/upgrading.rst
@@ -79,6 +79,21 @@ table or rename it or move it to another database using those tools. If you don'
 can use the ``airflow db shell`` command - this will drop you in the db shell tool for your database and you
 will be able to both inspect and delete the table.
 
+How to drop the table using Kubernetes:
+
+
+1. Exec into any of the Airflow pods - webserver or scheduler: ``kubectl exec -it <your-webserver-pod> python``
+
+2. Run the following commands in the python shell:
+
+ .. code-block:: python
+
+     from airflow.settings import Session
+
+     session = Session()
+     session.execute("DROP TABLE _airflow_moved__2_2__task_instance")
+     session.commit()
+
 Please replace ``<table>`` in the examples with the actual table name as printed in the warning message.
 
 Inspecting a table: