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### Describe the bug
This is a cleanup ticket for #12212 which had introduced logic for regexp forcing coercion to Utf8 if any side had utf8View. This looks to have been done before #12180 landed wh…
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Incorrect LIKE result when pattern contains `\\` two backslashes
`\` in LIKE pattern is an escape character (but see https://github.com/apache/datafusion/issues/13291)
```
query B
SELECT '%' L…
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Hello,
I am developing a data synchronization tool that uses datafusion, sqlx, and clickhouse-rs to support read and write operations for MySQL, PostgreSQL, and ClickHouse. I found the datafusion-t…
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### What type of enhancement is this?
Refactor
### What does the enhancement do?
The idea is to create a high level framework for UDF development (not UDAF), to
remove boilerplate code, and improv…
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from https://datafusion.apache.org/
> DataFusion is an extensible query engine written in [Rust](http://rustlang.org/) that uses [Apache Arrow](https://arrow.apache.org/) as its in-memory format. D…
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### Is your feature request related to a problem or challenge?
In https://github.com/apache/datafusion/pull/12269 @jayzhan211 made significant improvements to how group values are stored in multi-c…
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ORC timestamp type is not straightforward, as though it apparently represents a timestamp without a timezone, its encoding & decoding is still dependent on the writer timezone (encoded in the stripe) …
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### Describe the bug
the `field_qualifiers` in the DFSchema are missing when producer `LogicalPlan::EmptyRelation`
### To Reproduce
Add test in file: datafusion/substrait/tests/cases/roundtri…
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### Describe the bug
The function [can_coerce_from](https://docs.rs/datafusion/latest/datafusion/logical_expr/type_coercion/functions/fn.can_coerce_from.html) establishes the lossless conversions bet…
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### Describe the bug
I was doing https://github.com/apache/datafusion/pull/13054 and after rebase main I find out that the current parquet predicate pushdown may have some problem, it is 7 times slow…