From 8ddbc479fd18745e6fa34f48c2c18007cf7afd01 Mon Sep 17 00:00:00 2001
From: Guillaume Balaine <igosuki@gmail.com>
Date: Thu, 3 Feb 2022 19:20:01 +0100
Subject: [PATCH] add values when reporting conflicting schema merge

---
 datafusion/src/field_util.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/datafusion/src/field_util.rs b/datafusion/src/field_util.rs
index 2dfccb73092dc..a7e7d754e7bf8 100644
--- a/datafusion/src/field_util.rs
+++ b/datafusion/src/field_util.rs
@@ -269,8 +269,7 @@ impl SchemaExt for Schema {
                         if old_val != &value {
                             return Err(DataFusionError::ArrowError(
                                 ArrowError::InvalidArgumentError(
-                                    "Fail to merge schema due to conflicting metadata."
-                                        .to_string(),
+                                    format!("Fail to merge schema due to conflicting metadata, {} != {}.", old_val, value),
                                 ),
                             ));
                         }