thinkharderdev commented on code in PR #15149:
URL: https://github.com/apache/datafusion/pull/15149#discussion_r1993793767
##########
datafusion/expr-common/src/signature.rs:
##########
@@ -865,6 +867,39 @@ impl Signature {
volatility,
}
}
+
+ /// Specialized Signature for ArrayPrepend and similar functions
+ pub fn element_and_array(volatility: Volatility) -> Self {
+ Signature {
+ type_signature: TypeSignature::ArraySignature(
+ ArrayFunctionSignature::Array {
+ arguments: vec![
+ ArrayFunctionArgument::Element,
+ ArrayFunctionArgument::Array,
+ ],
+ array_coercion: Some(ListCoercion::FixedSizedListToList),
Review Comment:
tbh I'm not entirely clear on how the coercion comes into play but an append
to a fixed size list would still be a fixed size list right?
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