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Add an upgrade note on the execution_date -> run_id ORM change #19593

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Nov 15, 2021
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Add an upgrade note on the execution_date -> run_id ORM change #19593

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6 changes: 6 additions & 0 deletions UPDATING.md
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Expand Up @@ -287,6 +287,12 @@ Before updating to this 2.2 release you will have to manually resolve any incons

As part of this change the `clean_tis_without_dagrun_interval` config option under `[scheduler]` section has been removed and has no effect.

### TaskInstance and TaskReschedule now define `run_id` instead of `execution_date`

As a part of the TaskInstance-DagRun relation change, the `execution_date` columns on TaskInstance and TaskReschedule have been removed from the database, and replaced by [association proxy](https://docs.sqlalchemy.org/en/13/orm/extensions/associationproxy.html) fields at the ORM level. If you access Airflow’s metadatabase directly, you should rewrite the implementation to use the `run_id` columns instead.

Note that Airflow’s metadatabase definition on both the database and ORM levels are considered implementation detail without strict backward compatibility guarantees.

### DaskExecutor - Dask Worker Resources and queues

If dask workers are not started with complementary resources to match the specified queues, it will now result in an `AirflowException`, whereas before it would have just ignored the `queue` argument.
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