suibianwanwank commented on PR #16234:
URL: https://github.com/apache/datafusion/pull/16234#issuecomment-2949822560
@alamb I'm sorry for the issue that occurred. After a preliminary review, I
suspect the cause might be:
```
diff --git a/datafusion/physical-expr/src/window/window_expr.rs
b/datafusion/physical-expr/src/window/window_expr.rs
index 70a73c44a..8c9cb90b9 100644
--- a/datafusion/physical-expr/src/window/window_expr.rs
+++ b/datafusion/physical-expr/src/window/window_expr.rs
@@ -276,11 +276,12 @@ pub trait AggregateWindowExpr: WindowExpr {
not_end: bool,
) -> Result<ArrayRef> {
let values = self.evaluate_args(record_batch)?;
+ let length = values[0].len();
if self.is_constant_in_partition() {
accumulator.update_batch(&values)?;
let value = accumulator.evaluate()?;
- return value.to_array_of_size(record_batch.num_rows());
+ return value.to_array_of_size(length - idx);
}
let order_bys =
get_orderby_values(self.order_by_columns(record_batch)?);
let most_recent_row_order_bys = most_recent_row
@@ -289,7 +290,6 @@ pub trait AggregateWindowExpr: WindowExpr {
.map(get_orderby_values);
// We iterate on each row to perform a running calculation.
- let length = values[0].len();
let mut row_wise_results: Vec<ScalarValue> = vec![];
let is_causal = self.get_window_frame().is_causal();
while idx < length {
```
@andygrove Could you please help me confirm this? Thanks!
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