From 60df70053dfdca97dd0c603bed5f6e663caafd81 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Tue, 3 Feb 2015 20:39:24 +0300
Subject: [PATCH] dbms: fixed error [#METR-14902].

---
 dbms/include/DB/Storages/MergeTree/MergeTreeData.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/dbms/include/DB/Storages/MergeTree/MergeTreeData.h b/dbms/include/DB/Storages/MergeTree/MergeTreeData.h
index 343de9ee815..cf969d4d3fd 100644
--- a/dbms/include/DB/Storages/MergeTree/MergeTreeData.h
+++ b/dbms/include/DB/Storages/MergeTree/MergeTreeData.h
@@ -405,8 +405,13 @@ public:
 		{
 			/// Размер - в количестве засечек.
 			if (!size)
+			{
+				if (columns.empty())
+					throw Exception("No columns in part " + name, ErrorCodes::NO_FILE_IN_DATA_PART);
+
 				size = Poco::File(storage.full_path + name + "/" + escapeForFileName(columns.front().name) + ".mrk")
 					.getSize() / MERGE_TREE_MARK_SIZE;
+			}
 
 			size_t key_size = storage.sort_descr.size();
 			index.resize(key_size * size);
@@ -456,6 +461,9 @@ public:
 						columns.push_back(column);
 				}
 
+				if (columns.empty())
+					throw Exception("No columns in part " + name, ErrorCodes::NO_FILE_IN_DATA_PART);
+
 				{
 					WriteBufferFromFile out(path + ".tmp", 4096);
 					columns.writeText(out);