comphead commented on code in PR #8381:
URL: https://github.com/apache/arrow-datafusion/pull/8381#discussion_r1412366274
##########
datafusion/physical-expr/src/array_expressions.rs:
##########
@@ -1515,32 +1515,33 @@ pub fn array_union(args: &[ArrayRef]) ->
Result<ArrayRef> {
}
let array1 = &args[0];
let array2 = &args[1];
+
+ fn union_arrays<O: OffsetSizeTrait>(
+ array1: &ArrayRef,
+ array2: &ArrayRef,
+ l_field_ref: &Arc<Field>,
+ r_field_ref: &Arc<Field>,
+ ) -> Result<ArrayRef> {
+ match (l_field_ref.data_type(), r_field_ref.data_type()) {
+ (DataType::Null, _) => Ok(array2.clone()),
Review Comment:
nvm, thanks @Weijun-H its cloning a reference not the underlying data
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