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**Describe the bug**
This is a MRE for a query that results in this error:
```
InvalidArgumentError("Column 'COUNT(DISTINCT tbl.col2)[count distinct]' is declared as non-nullable but contains nul…
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# Description
From @roeap:
> Generate query plans for operations requiring current table data as substrait (https://substrait.io) plans to integrate with different query backends
> * (py)arrow …
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### What type of enhancement is this?
Tech debt reduction, Other
### What does the enhancement do?
Sooner or later we should upgrade it. I'd create this ticket to collect information, since this up…
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### Is your feature request related to a problem or challenge?
This is a follow on to https://github.com/apache/arrow-datafusion/issues/8913 that tracks additional improvements to the `TreeNode` AP…
alamb updated
4 months ago
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Implement some CLI binaries for working with ORC files such as reading schema, getting stats, etc.
Tools to have:
- View footer metadata
- Initial version: https://github.com/datafusion-contr…
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**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
```
"/home/andy/git/apache/arrow-datafusion/datafusion/physical-expr/src/aggregate/approx_di…
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# Josiah Parry - Building a DataFusion CSV reader with arrow-extendr
[https://josiahparry.com/posts/2023-11-24-dfusionrdr/](https://josiahparry.com/posts/2023-11-24-dfusionrdr/)
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**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
A clear and concise description of what the problem is. Ex. I'm always frustrated when [...] …
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### Is your feature request related to a problem or challenge?
The `ListingTable` works quite well in practice, but like all software could be made better. I am writing up this ticket to enumerate…
alamb updated
2 months ago
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**Maven Pom.xml**
```xml
io.github.datafusion-contrib
datafusion-java
0.15.0
```
**Code:**
```Java
SessionContext context = SessionContexts.create();
System.out.println(…