jayzhan211 commented on code in PR #10268:
URL: https://github.com/apache/datafusion/pull/10268#discussion_r1581973804
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datafusion/expr/src/signature.rs:
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@@ -92,14 +92,19 @@ pub enum TypeSignature {
/// A function such as `concat` is `Variadic(vec![DataType::Utf8,
DataType::LargeUtf8])`
Variadic(Vec<DataType>),
/// One or more arguments of an arbitrary but equal type.
- /// DataFusion attempts to coerce all argument types to match the first
argument's type
+ /// DataFusion attempts to coerce all argument types to match to the
common type with comparision coercion.
///
/// # Examples
/// Given types in signature should be coercible to the same final type.
/// A function such as `make_array` is `VariadicEqual`.
///
/// `make_array(i32, i64) -> make_array(i64, i64)`
VariadicEqual,
Review Comment:
We can rename to VariadicCoercibleEqual if it is confusing with
`VariadicEqualOrNull`
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