I can't find a past discussion specific to Oracle, but it's not a new 
proposal. See 
for "Moving database backends out of the core."

I think removing Oracle from core would only increase the maintenance 
burden. Since Oracle has edge cases, it's useful to test those along with 
new Django features. If the Oracle backend is in a separate repo, then 
adding new features will often require commits to two repositories and I 
don't know how we would run the tests with pull request X for Django and 
pull request Y for the Oracle backend. Then we also have to release the 
Oracle backend separately.

djangoci.com isn't reporting any Oracle failures on master. If you've found 
an issue, please open a ticket with details.

We don't run the Oracle tests with pull requests because they take about an 
hour, while other databases take about 10 minutes. It hasn't been difficult 
to identify which pull requests require running the tests on Oracle and to 
trigger that build with the trigger phrase.

On Sunday, November 25, 2018 at 5:21:02 AM UTC-5, Johannes Hoppe wrote:
> Hi there,
> I have recently refactored some bits in the database backend and came to 
> realize that a lot of the complexity in there comes from the poor 
> implementation of the Oracle backend.
> Fun fact, did you know that Oracle tests don't run by default and that the 
> current master, fails on oracle ;)
> Anyhow, I want to come to a conclusion about the following matter:
> Should we remove the Oracle database backend from Django core in the 3.0 
> release?
> Here are a couple of reasons, why I believe this to be a good idea:
>    - License
>    - Oracle is  Proprietary software
>    - Money
>       - Oracle is not a sponsor of the Django Foundation, but makes 40bn 
>       in revenue
>    - Technical:
>       - Oracle does not support may features
>       - due to its lack of features, a lot of edge case handling to the 
>       base database backend which drives overall complexity
>    - Development:
>       - Oracle does not run in the regular CI suite, in fact master is 
>       broken right now
>       - entrance barrier for first time contributors is high
>          - one needs to accept a non open source license
>          - register with oracle
>          - go through a very complex setup process
> Of course there are some users who use Oracle and I don't want to keep 
> them hanging. I simply believe the database backend should be developed 
> separately from Django.
> This could even be helpful for the Oracle community. Since oracle is 
> enterprise only, they usually looks for longer support cycles than what 
> Django want's to offer.
> Ok, I made my case, I am curious, what do you guys think?
> Best
> -Joe

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