From 44221139e9f2d637a5e1a10a628692552c062291 Mon Sep 17 00:00:00 2001
From: Alexey Milovidov <milovidov@yandex-team.ru>
Date: Sun, 14 Jun 2020 07:35:50 +0300
Subject: [PATCH] Fix test

---
 src/DataTypes/DataTypeUUID.cpp          | 7 ++++++-
 src/DataTypes/DataTypeUUID.h            | 3 +++
 src/Interpreters/convertFieldToType.cpp | 7 +++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/DataTypes/DataTypeUUID.cpp b/src/DataTypes/DataTypeUUID.cpp
index 87e306cf477..94a043eb472 100644
--- a/src/DataTypes/DataTypeUUID.cpp
+++ b/src/DataTypes/DataTypeUUID.cpp
@@ -16,13 +16,18 @@ void DataTypeUUID::serializeText(const IColumn & column, size_t row_num, WriteBu
     writeText(UUID(assert_cast<const ColumnUInt128 &>(column).getData()[row_num]), ostr);
 }
 
-void DataTypeUUID::deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
+void DataTypeUUID::deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const
 {
     UUID x;
     readText(x, istr);
     assert_cast<ColumnUInt128 &>(column).getData().push_back(x);
 }
 
+void DataTypeUUID::deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const
+{
+    deserializeText(column, istr, settings);
+}
+
 void DataTypeUUID::serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings & settings) const
 {
     serializeText(column, row_num, ostr, settings);
diff --git a/src/DataTypes/DataTypeUUID.h b/src/DataTypes/DataTypeUUID.h
index 75e634bc625..e9f1d22325b 100644
--- a/src/DataTypes/DataTypeUUID.h
+++ b/src/DataTypes/DataTypeUUID.h
@@ -17,6 +17,7 @@ public:
     bool equals(const IDataType & rhs) const override;
 
     void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
+    void deserializeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
     void serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
     void deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
     void serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
@@ -30,6 +31,8 @@ public:
 
     bool canBeUsedInBitOperations() const override { return true; }
     bool canBeInsideNullable() const override { return true; }
+
+    bool canBePromoted() const override { return false; }
 };
 
 }
diff --git a/src/Interpreters/convertFieldToType.cpp b/src/Interpreters/convertFieldToType.cpp
index d60bb6cee6c..21cf9422c32 100644
--- a/src/Interpreters/convertFieldToType.cpp
+++ b/src/Interpreters/convertFieldToType.cpp
@@ -173,6 +173,13 @@ Field convertFieldToTypeImpl(const Field & src, const IDataType & type, const ID
             /// We don't need any conversion UInt64 is under type of Date and DateTime
             return src;
         }
+
+        if (which_type.isUUID() && src.getType() == Field::Types::UInt128)
+        {
+            /// Already in needed type.
+            return src;
+        }
+
         // TODO (vnemkov): extra cases for DateTime64: converting from integer, converting from Decimal
     }
     else if (which_type.isStringOrFixedString())