milenkovicm commented on code in PR #18688:
URL: https://github.com/apache/datafusion/pull/18688#discussion_r2528265646
##########
datafusion/core/tests/dataframe/mod.rs:
##########
@@ -2338,6 +2338,29 @@ async fn cache_test() -> Result<()> {
Ok(())
}
+#[tokio::test]
+async fn cache_producer_test() -> Result<()> {
+ let df = test_table_with_cache_producer()
+ .await?
+ .select_columns(&["c2", "c3"])?
+ .limit(0, Some(1))?
+ .with_column("sum", cast(col("c2") + col("c3"), DataType::Int64))?;
+
+ let cached_df = df.clone().cache().await?;
+
+ assert_snapshot!(
+ cached_df.clone().into_optimized_plan().unwrap(),
+ @r###"
+ CacheNode
+ Projection: aggregate_test_100.c2, aggregate_test_100.c3,
CAST(CAST(aggregate_test_100.c2 AS Int64) + CAST(aggregate_test_100.c3 AS
Int64) AS Int64) AS sum
+ Projection: aggregate_test_100.c2, aggregate_test_100.c3
+ Limit: skip=0, fetch=1
+ TableScan: aggregate_test_100, fetch=1
+ "###
+ );
Review Comment:
perhaps we can do it as a follow up in examples
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