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### Is your feature request related to a problem or challenge?
Currently DataFusion provides a lot of built-in types which are useful when building applications / query engines on top of DataFusion…
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**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
While working on an upstream project https://github.com/apache/datafusion/pull/12092 which sw…
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**Describe the bug**
Using `downcast_primitive_array` and `downcast_dictionary_array` require `arrow_schema` to be in scope of the expanded code.
**To Reproduce**
1. use `arrow::downcast_pr…
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Trying to query an emtpy table results in a schema error, and I noticed that an empty table in postgres did not have any schema when mapped via a TableProvider, and after some digging saw that the sch…
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**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
DataFusion has an optimized version of `concat(col1, ...)` for `StringView` added by @devan…
alamb updated
2 weeks ago
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# Problem
https://github.com/lancedb/lance/blob/ef0953df8220a36b6433e47bea6112ce4fc7f3c8/rust/lance-datafusion/src/utils.rs#L41
```
Database { table: Some("..."), cause: "lance error: LanceErro…
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### Is your feature request related to a problem or challenge?
While I was working on #12415, I found the `DictionaryString` can't pass the following case in `datafusion/sqllogictest/test_files/strin…
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## Describe the bug
Run TPCDS query 2 or 78 with [coalesce fix](https://github.com/spiceai/datafusion/pull/33)
https://github.com/apache/datafusion-benchmarks/blob/main/tpcds/queries/q78.sql
Postgr…
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### What is the problem the feature request solves?
For folks considering adopting Arrow Datafusion Comet who have Dataset code in Scala & Python it would probably be useful to be able to run similar…
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### Describe the bug
I have a custom data sink whose schema contains an array whose element type is non-nullable. If I attempt to insert an array literal with a null element into this data sink via …