jayzhan211 commented on code in PR #8317:
URL: https://github.com/apache/arrow-datafusion/pull/8317#discussion_r1404759206
##########
datafusion/expr/src/type_coercion/functions.rs:
##########
@@ -95,7 +110,50 @@ fn get_valid_types(
TypeSignature::VariadicAny => {
vec![current_types.to_vec()]
}
+
TypeSignature::Exact(valid_types) => vec![valid_types.clone()],
+ TypeSignature::ArrayAppendLikeSignature => {
Review Comment:
Have a specialized checking for array append at the end. And I think we will
need specialized check for other pattern too
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