2010YOUY01 commented on PR #13296:
URL: https://github.com/apache/datafusion/pull/13296#issuecomment-2493719309
The implementation is really nice.
I'm wondering is it convenient to move the stream concat logic into
`StreamingMergeBuilder`, like
```rust
let result = StreamingMergeBuilder::new()
.with_streams(inputs)
.with_statistics_by_stream(stats)
.build(); // Concat non-overlapping input streams here
```
Now `SortExec` is implemented as 1. Sort several small runs 2. Create a
internal `SortPreservingMergeStream` to merge all small runs. This way sort
query can also benefit from this work with some additional effort
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