shehabgamin commented on code in PR #14440:
URL: https://github.com/apache/datafusion/pull/14440#discussion_r1951995420
##########
datafusion/expr-common/src/signature.rs:
##########
@@ -460,6 +521,44 @@ fn get_data_types(native_type: &NativeType) ->
Vec<DataType> {
}
}
+#[derive(Debug, Clone, Eq, PartialOrd)]
+pub struct Coercion {
Review Comment:
@jayzhan211 , I believe @alamb 's question (please correct me if I'm wrong)
is about creating functionality for a downstream user to override the default
signature of a UDF in order to provide their own coercion rules.
For example, something like this:
```
let scalar_expr = ScalarExprBuilder::new(AsciiFunc::new(), args)
.with_signature(Signature::any(1,
Volatility::Immutable))
.build()
.map(Arc::new)?;
```
This is the conversation we were having here as well:
https://github.com/apache/datafusion/issues/14296#issuecomment-2614200125
https://github.com/apache/datafusion/issues/14296#issuecomment-2614251635
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