From 0fbfac056d46de407a2caa3fa220f67fd0d80491 Mon Sep 17 00:00:00 2001
From: Anton Popov <pad11rus@gmail.com>
Date: Tue, 21 Sep 2021 22:39:30 +0300
Subject: [PATCH] better diagnostic in ReplicatedMergeTree

---
 src/Storages/StorageReplicatedMergeTree.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Storages/StorageReplicatedMergeTree.cpp b/src/Storages/StorageReplicatedMergeTree.cpp
index 29646c99262..e67947ae811 100644
--- a/src/Storages/StorageReplicatedMergeTree.cpp
+++ b/src/Storages/StorageReplicatedMergeTree.cpp
@@ -961,7 +961,9 @@ void StorageReplicatedMergeTree::checkTableStructure(const String & zookeeper_pr
     const ColumnsDescription & old_columns = metadata_snapshot->getColumns();
     if (columns_from_zk != old_columns)
     {
-        throw Exception("Table columns structure in ZooKeeper is different from local table structure", ErrorCodes::INCOMPATIBLE_COLUMNS);
+        throw Exception(ErrorCodes::INCOMPATIBLE_COLUMNS,
+            "Table columns structure in ZooKeeper is different from local table structure. Local columns:\n"
+            "{}\nZookeeper columns:\n{}", old_columns.toString(), columns_from_zk.toString());
     }
 }