From 7b247899a4952c9a4816a604883c9a285006d795 Mon Sep 17 00:00:00 2001
From: Piotr Findeisen <piotr.findeisen@gmail.com>
Date: Mon, 3 Feb 2025 21:05:50 +0100
Subject: [PATCH] Improve error message on unsupported correlation

---
 datafusion/expr/src/logical_plan/invariants.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/datafusion/expr/src/logical_plan/invariants.rs b/datafusion/expr/src/logical_plan/invariants.rs
index bde4acaae562..46c1d7c13513 100644
--- a/datafusion/expr/src/logical_plan/invariants.rs
+++ b/datafusion/expr/src/logical_plan/invariants.rs
@@ -288,7 +288,10 @@ fn check_inner_plan(inner_plan: &LogicalPlan, can_contain_outer_ref: bool) -> Re
             }
         },
         LogicalPlan::Extension(_) => Ok(()),
-        _ => plan_err!("Unsupported operator in the subquery plan."),
+        _ => plan_err!(
+            "Unsupported operator in the subquery plan: {}",
+            inner_plan.display()
+        ),
     }
 }