Jimexist commented on a change in pull request #515:
URL: https://github.com/apache/arrow-datafusion/pull/515#discussion_r646132592
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File path: datafusion/src/physical_plan/sort.rs
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@@ -277,9 +250,14 @@ impl SortStream {
.map_err(DataFusionError::into_arrow_external_error)
.and_then(move |batches| {
let now = Instant::now();
- let result = sort_batches(&batches, &schema, &expr);
+ // combine all record batches into one for each column
+ let combined = common::combine_batches(&batches,
schema.clone())?;
+ // sort combined record batch
+ let result = combined
+ .map(|batch| sort_batch(batch, schema, &expr))
+ .transpose()?;
sort_time.add(now.elapsed().as_nanos() as usize);
Review comment:
Note here the semantic is changed because on err it would no longer log
a metric which shall be the correct behavior
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