From 2252ee5a9012b39891a2d09e2e21fef6d75a8a67 Mon Sep 17 00:00:00 2001
From: Dmitry Rubashkin <dimarub2000@sandbox-407922969>
Date: Tue, 17 Sep 2019 11:17:46 +0300
Subject: [PATCH] Branch refactoring.

---
 dbms/src/Interpreters/convertFieldToType.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dbms/src/Interpreters/convertFieldToType.cpp b/dbms/src/Interpreters/convertFieldToType.cpp
index 3104d612e43..8bc6ee5b9d5 100644
--- a/dbms/src/Interpreters/convertFieldToType.cpp
+++ b/dbms/src/Interpreters/convertFieldToType.cpp
@@ -187,6 +187,12 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
             return dynamic_cast<const IDataTypeEnum &>(type).castToValue(src);
         }
 
+        if (which_type.isDateOrDateTime() && src.getType() == Field::Types::UInt64)
+        {
+            /// We don't need any conversion UInt64 is under type of Date and DateTime
+            return src;
+        }
+
         if (src.getType() == Field::Types::String)
         {
             if (which_type.isDate())