ologlogn commented on code in PR #22597:
URL: https://github.com/apache/datafusion/pull/22597#discussion_r3323426533
##########
datafusion/functions-aggregate/src/array_agg.rs:
##########
@@ -1008,7 +1008,13 @@ impl OrderSensitiveArrayAggAccumulator {
} else {
(0..fields.len())
.map(|i| {
- let column_values = self.ordering_values.iter().map(|x|
x[i].clone());
+ let column_values: Box<dyn Iterator<Item = ScalarValue>> =
if self
+ .reverse
+ {
+ Box::new(self.ordering_values.iter().rev().map(|x|
x[i].clone()))
+ } else {
+ Box::new(self.ordering_values.iter().map(|x|
x[i].clone()))
+ };
Review Comment:
It;s kind of hard to reproduce with just sql, this happens because of the
order of execution..
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