2010YOUY01 commented on code in PR #13995:
URL: https://github.com/apache/datafusion/pull/13995#discussion_r1903119766
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datafusion/core/src/dataframe/mod.rs:
##########
@@ -2743,6 +2753,110 @@ mod tests {
Ok(())
}
+ // test for https://github.com/apache/datafusion/issues/13949
+ async fn run_test_with_spill_pool_if_necessary(pool_size: usize) ->
Result<()> {
+ fn create_record_batch(
+ schema: &Arc<Schema>,
+ data: (Vec<u32>, Vec<f64>),
+ ) -> Result<RecordBatch> {
+ Ok(RecordBatch::try_new(
+ Arc::clone(schema),
+ vec![
+ Arc::new(UInt32Array::from(data.0)),
+ Arc::new(Float64Array::from(data.1)),
+ ],
+ )?)
+ }
+
+ let schema = Arc::new(Schema::new(vec![
+ Field::new("a", DataType::UInt32, false),
+ Field::new("b", DataType::Float64, false),
+ ]));
+
+ let batches = vec![
+ create_record_batch(&schema, (vec![2, 3, 4, 4], vec![1.0, 2.0,
3.0, 4.0]))?,
+ create_record_batch(&schema, (vec![2, 3, 4, 4], vec![1.0, 2.0,
3.0, 4.0]))?,
+ ];
+ let plan: Arc<dyn ExecutionPlan> =
+ Arc::new(MemoryExec::try_new(&[batches], schema.clone(), None)?);
+
+ let grouping_set = PhysicalGroupBy::new(
+ vec![(physical_col("a", &schema)?, "a".to_string())],
+ vec![],
+ vec![vec![false]],
+ );
+
+ let aggregates: Vec<Arc<AggregateFunctionExpr>> = vec![
+ Arc::new(
+ AggregateExprBuilder::new(
+ datafusion_functions_aggregate::min_max::min_udaf(),
+ vec![physical_col("b", &schema)?],
+ )
+ .schema(schema.clone())
+ .alias("MIN(b)")
+ .build()?,
+ ),
+ Arc::new(
+ AggregateExprBuilder::new(
+ datafusion_functions_aggregate::min_max::max_udaf(),
+ vec![physical_col("b", &schema)?],
+ )
+ .schema(schema.clone())
+ .alias("MAX(b)")
+ .build()?,
+ ),
+ ];
+
+ let single_aggregate = Arc::new(AggregateExec::try_new(
+ AggregateMode::Single,
+ grouping_set,
+ aggregates,
+ vec![None, None],
+ plan,
+ schema.clone(),
+ )?);
+
+ let batch_size = 2;
+ let memory_pool = Arc::new(FairSpillPool::new(pool_size));
+ let task_ctx = Arc::new(
+ TaskContext::default()
+
.with_session_config(SessionConfig::new().with_batch_size(batch_size))
+ .with_runtime(Arc::new(
+ RuntimeEnvBuilder::new()
+ .with_memory_pool(memory_pool)
+ .build()?,
+ )),
+ );
+
+ let result =
+ common::collect(single_aggregate.execute(0,
Arc::clone(&task_ctx))?).await?;
+
Review Comment:
I suggest to add an assertion here to make sure spilling actually happened
for certain test cases like:
```rust
let metrics = single_aggregate.metrics();
// ...and assert some metrics inside like 'spill count' is > 0
```
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