bert-beyondloops opened a new issue, #21798:
URL: https://github.com/apache/datafusion/issues/21798
### Describe the bug
When a function expects a `BinaryView` argument, DataFusion's type coercion
did not allow `Binary` or `LargeBinary` values to be automatically coerced into
`BinaryView`.
This caused errors when calling such functions with binary columns that
are not already stored as `BinaryView`.
This is inconsistent with the existing behaviour for string types, where
`Utf8` and `LargeUtf8` can already be coerced into `Utf8View`.
## Root Cause
The `coerced_from` function in
`datafusion/expr/src/type_coercion/functions.rs` was missing a match arm for
`(BinaryView, Binary | LargeBinary | Null)`.
### To Reproduce
Create a scalar UDF with for example a signature with
`Signature::exact(vec![BinaryView], Volatility::Immutable)`
Calling this scalar function with a Binary or LargeBinary datatype or even
NULL was not coerced and resulted in a planning error.
### Expected behavior
The coercion should take place in the same way as is foreseen already for
the string datatypes (Utf8, LargeUtf8, Null -> Utf8View)
### Additional context
_No response_
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