dstandish opened a new issue, #26607:
URL: https://github.com/apache/airflow/issues/26607
### Body
Got this warning in webserver output when loading home page
```
/Users/dstandish/code/airflow/airflow/www/views.py:710 SADeprecationWarning:
DISTINCT ON is currently supported only by the PostgreSQL dialect. Use of
DISTINCT ON for other backends is currently silently ignored, however this
usage is deprecated, and will raise CompileError in a future release for all
backends that do not support this syntax.
```
looks like it's this line
```
dagtags = session.query(DagTag.name).distinct(DagTag.name).all()
```
may be able to change to `func.distinct`
### Committer
- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow
project.
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