goldmedal commented on code in PR #13255:
URL: https://github.com/apache/datafusion/pull/13255#discussion_r1828682832
##########
datafusion/expr-common/src/signature.rs:
##########
@@ -243,6 +243,27 @@ impl TypeSignature {
_ => false,
}
}
+
+ /// get all possible types for the given `TypeSignature`
+ pub fn get_possible_types(&self) -> Vec<Vec<DataType>> {
+ match self {
+ TypeSignature::Exact(types) => vec![types.clone()],
+ TypeSignature::OneOf(types) => types
+ .iter()
+ .flat_map(|type_sig| type_sig.get_possible_types())
+ .collect(),
+ // TODO: Implement for other types
+ TypeSignature::Uniform(_, _)
+ | TypeSignature::Coercible(_)
Review Comment:
There is a follow-up issue for inferring the types from other TypeSignatures.
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