xudong963 commented on issue #14478:
URL: https://github.com/apache/datafusion/issues/14478#issuecomment-2640010194
> ## Probably Not: Correlated Subqueries
> For this project:
>
> * [[EPIC] More Subquery support
#5483](https://github.com/apache/datafusion/issues/5483)
>
> For this project, I think a successful candidate (and the kind of person I
would be happy to help mentor) is graduate students who have a background in
query optimizers (for example, can explain clearly what [Unnesting Arbitrary
Queries](https://btw-2015.informatik.uni-hamburg.de/res/proceedings/Hauptband/Wiss/Neumann-Unnesting_Arbitrary_Querie.pdf)
is about)
>
> This isn't a great project for someone who doesn't already have a deep
understanding on queries, join graphs, and subqueries as it will take most of
the summer just to understand what we are trying to do
I have a strong background of Correlated Subqueries and have fully
implemented the paper [Unnesting Arbitrary
Queries](https://btw-2015.informatik.uni-hamburg.de/res/proceedings/Hauptband/Wiss/Neumann-Unnesting_Arbitrary_Querie.pdf)
in practice, but I don't have enough time to mentor a student, so I'm happy to
be a helper if someone want to mentor a student.
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