From 94c36922ac743c7cf0f0274d7ffc46a9b2fd12e6 Mon Sep 17 00:00:00 2001
From: Gavin King <gavin@hibernate.org>
Date: Mon, 15 Jan 2024 21:21:28 +0100
Subject: [PATCH] fix broken signature string of timestampdiff()

---
 .../org/hibernate/dialect/function/TimestampdiffFunction.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampdiffFunction.java b/hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampdiffFunction.java
index 0691d4c7f4..77a5cacca0 100644
--- a/hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampdiffFunction.java
+++ b/hibernate-core/src/main/java/org/hibernate/dialect/function/TimestampdiffFunction.java
@@ -167,7 +167,8 @@ public class TimestampdiffFunction
 
 		@Override
 		public String getReturnType() {
-			return longType + "|" + doubleType;
+			return longType.getJavaType().getSimpleName()
+				+ "|" + doubleType.getJavaType().getSimpleName();
 		}
 	}