alamb commented on code in PR #17264:
URL: https://github.com/apache/datafusion/pull/17264#discussion_r2292202435
##########
datafusion/expr-common/src/signature.rs:
##########
@@ -736,10 +773,22 @@ impl Hash for ImplicitCoercion {
}
}
-/// Defines the supported argument types ([`TypeSignature`]) and
[`Volatility`] for a function.
+/// Defines supported argument types and volatility for a function.
+///
+/// A [`Signature`] provides DataFusion information necessary for calling a
+/// function.
+///
+/// The [`TypeSignature`] defines the types that a function has implementations
Review Comment:
Yes, good call -- added in edaeca66a
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