alamb commented on code in PR #22104:
URL: https://github.com/apache/datafusion/pull/22104#discussion_r3227490875
##########
datafusion/proto/tests/cases/roundtrip_logical_plan.rs:
##########
@@ -3173,3 +3173,105 @@ async fn roundtrip_empty_table_scan_with_projection()
-> Result<()> {
);
Ok(())
}
+
+// Regression test for https://github.com/apache/datafusion/issues/22065
+#[tokio::test]
+async fn roundtrip_join_null_aware() -> Result<()> {
+ use datafusion_common::tree_node::{TreeNode, TreeNodeRecursion};
+ use datafusion_expr::JoinType;
+
+ let ctx = SessionContext::new();
+ let sql = "
+ SELECT id
+ FROM (VALUES (1), (2), (3)) AS t1(id)
+ WHERE id NOT IN (
+ SELECT bad_id
+ FROM (VALUES (CAST(1 AS INT)), (CAST(NULL AS INT))) AS
excludes(bad_id)
+ )
+ ";
+
+ let df = ctx.sql(sql).await?;
+ let plan = ctx.state().optimize(df.logical_plan())?;
+
+ let mut found_null_aware = false;
+ plan.apply(|n| {
+ if let LogicalPlan::Join(j) = n
+ && j.join_type == JoinType::LeftAnti
+ && j.null_aware
+ {
+ found_null_aware = true;
+ }
+ Ok(TreeNodeRecursion::Continue)
+ })?;
+ assert!(found_null_aware);
+
+ let bytes = logical_plan_to_bytes(&plan)?;
+ let logical_round_trip = logical_plan_from_bytes(&bytes, &ctx.task_ctx())?;
+ assert_eq!(format!("{plan:?}"), format!("{logical_round_trip:?}"));
+
+ let direct: usize = ctx
+ .execute_logical_plan(plan)
+ .await?
+ .collect()
+ .await?
+ .iter()
+ .map(|b| b.num_rows())
+ .sum();
+ let rt: usize = ctx
+ .execute_logical_plan(logical_round_trip)
+ .await?
+ .collect()
+ .await?
+ .iter()
+ .map(|b| b.num_rows())
+ .sum();
+ assert_eq!(direct, 0);
+ assert_eq!(rt, direct);
+
+ Ok(())
+}
+
+// Regression test for null_equality round-trip (related to #22065).
+#[tokio::test]
+async fn roundtrip_join_null_equality() -> Result<()> {
Review Comment:
I don't fully undersand why both tests are needed here
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