alamb commented on code in PR #5894:
URL: https://github.com/apache/arrow-datafusion/pull/5894#discussion_r1160635957
##########
datafusion/core/src/physical_plan/sorts/builder.rs:
##########
@@ -89,82 +99,37 @@ impl BatchBuilder {
return Ok(None);
}
- // Mapping from stream index to the index of the first buffer from
that stream
- let mut buffer_idx = 0;
- let mut stream_to_buffer_idx = Vec::with_capacity(self.batches.len());
-
- for batches in &self.batches {
- stream_to_buffer_idx.push(buffer_idx);
- buffer_idx += batches.len();
- }
-
- let columns = self
- .schema
- .fields()
- .iter()
- .enumerate()
- .map(|(column_idx, field)| {
- let arrays = self
+ let columns = (0..self.schema.fields.len())
+ .map(|column_idx| {
+ let arrays: Vec<_> = self
.batches
.iter()
- .flat_map(|batch| {
- batch.iter().map(|batch|
batch.column(column_idx).data())
- })
+ .map(|(_, batch)| batch.column(column_idx).as_ref())
.collect();
-
- let mut array_data = MutableArrayData::new(
- arrays,
- field.is_nullable(),
- self.indices.len(),
- );
-
- let first = &self.indices[0];
- let mut buffer_idx =
- stream_to_buffer_idx[first.stream_idx] + first.batch_idx;
- let mut start_row_idx = first.row_idx;
- let mut end_row_idx = start_row_idx + 1;
-
- for row_index in self.indices.iter().skip(1) {
- let next_buffer_idx =
- stream_to_buffer_idx[row_index.stream_idx] +
row_index.batch_idx;
-
- if next_buffer_idx == buffer_idx && row_index.row_idx ==
end_row_idx {
- // subsequent row in same batch
- end_row_idx += 1;
- continue;
- }
-
- // emit current batch of rows for current buffer
- array_data.extend(buffer_idx, start_row_idx, end_row_idx);
-
- // start new batch of rows
- buffer_idx = next_buffer_idx;
- start_row_idx = row_index.row_idx;
- end_row_idx = start_row_idx + 1;
- }
-
- // emit final batch of rows
- array_data.extend(buffer_idx, start_row_idx, end_row_idx);
- make_array(array_data.freeze())
+ Ok(interleave(&arrays, &self.indices)?)
Review Comment:
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