comphead commented on code in PR #11218:
URL: https://github.com/apache/datafusion/pull/11218#discussion_r1678505039
##########
datafusion/physical-plan/src/joins/sort_merge_join.rs:
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@@ -602,15 +622,38 @@ impl BufferedBatch {
+ mem::size_of::<Range<usize>>()
+ mem::size_of::<usize>();
+ let num_rows = batch.num_rows();
BufferedBatch {
batch,
range,
join_arrays,
null_joined: vec![],
size_estimation,
join_filter_failed_idxs: HashSet::new(),
+ num_rows,
+ spill_file: None,
}
}
+
+ fn spill_to_disk(
+ &mut self,
+ path: RefCountedTempFile,
+ buffered_schema: SchemaRef,
+ batch_size: usize,
+ ) -> Result<()> {
+ let batch = std::mem::replace(
+ &mut self.batch,
+ RecordBatch::new_empty(Arc::clone(&buffered_schema)),
+ );
+ let _ = spill_record_batch_by_size(
+ batch,
+ path.path().into(),
+ buffered_schema,
+ batch_size,
+ );
+ self.spill_file = Some(path);
Review Comment:
The batch can be spilled only once to the disk. I'm not sure if there is a
necessity of spilling multiple times. But even if so the spill file will be
pointing to the most recent valid spill file
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