alamb commented on issue #343:
URL: https://github.com/apache/arrow-rs/issues/343#issuecomment-847219171
> We also have slice which already should make it quite easy to build this
functionality (or use it to implement this functionality with).
Indeed -- I think that is how @tustvold implemented `split_batch`:
```rust
fn split_batch(sorted: &RecordBatch, batch_size: usize) ->
Vec<RecordBatch> {
let batches = (sorted.num_rows() + batch_size - 1) / batch_size;
// Split the sorted RecordBatch into multiple
(0..batches)
.into_iter()
.map(|batch_idx| {
let columns = (0..sorted.num_columns())
.map(|column_idx| {
let length =
batch_size.min(sorted.num_rows() - batch_idx *
batch_size);
sorted
.column(column_idx)
.slice(batch_idx * batch_size, length)
})
.collect();
RecordBatch::try_new(sorted.schema(), columns).unwrap()
})
.collect()
}
```
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