jayzhan211 commented on code in PR #8317:
URL: https://github.com/apache/arrow-datafusion/pull/8317#discussion_r1421179330
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datafusion/expr/src/signature.rs:
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@@ -95,6 +95,8 @@ pub enum TypeSignature {
VariadicEqual,
/// One or more arguments with arbitrary types
VariadicAny,
+ /// A function such as `make_array` should be coerced to the same type
+ VariadicCoerced,
Review Comment:
I just noticed that `VariadicEqual` is not used in any function. Maybe we
can just keep one.
I thought Equal is the one that don't care about coercion. All the type
should be equal like (i32, i32, i32).
Coerced is the one that ensuring the final coerced type is the same (all of
the type coercible to the same one), like (i32, i64) -> i64.
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