findepi commented on code in PR #13756:
URL: https://github.com/apache/datafusion/pull/13756#discussion_r1884102861
##########
datafusion/expr/src/type_coercion/functions.rs:
##########
@@ -414,7 +415,18 @@ fn get_valid_types(
_ => Ok(vec![vec![]]),
}
}
+
fn array(array_type: &DataType) -> Option<DataType> {
+ match array_type {
+ DataType::List(_) => Some(array_type.clone()),
+ DataType::LargeList(field) | DataType::FixedSizeList(field, _) => {
+ Some(DataType::List(Arc::clone(field)))
+ }
+ _ => None,
+ }
+ }
+
+ fn recursive_array(array_type: &DataType) -> Option<DataType> {
Review Comment:
I don't know how to do this, please advise!
But this function should go away with
https://github.com/apache/datafusion/issues/13757.
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