Merge

dbms/include/DB/Core/Block.h

@@ -20,6 +20,8 @@ namespace DB
   * Позволяет вставлять, удалять столбцы в любом порядке, менять порядок столбцов.
   */
 
+class Context;
+
 class Block
 {
 public:
@@ -54,6 +56,7 @@ public:
 	void insert(size_t position, const ColumnWithNameAndType & elem);
 	/// вставить столбец в конец
 	void insert(const ColumnWithNameAndType & elem);
+	void insertDefault(const String & name, const DataTypePtr & type);
 	/// вставить столбец в конец, если столбца с таким именем ещё нет
 	void insertUnique(const ColumnWithNameAndType & elem);
 	/// удалить столбец в заданной позиции
@@ -61,7 +64,7 @@ public:
 	/// удалить столбец с заданным именем
 	void erase(const String & name);
 	/// Добавляет в блок недостающие столбцы со значениями по-умолчанию
-	void addDefaults(NamesAndTypesListPtr required_columns);
+	void addDefaults(const NamesAndTypesList & required_columns);
 
 	ColumnWithNameAndType & getByPosition(size_t position);
 	const ColumnWithNameAndType & getByPosition(size_t position) const;

dbms/include/DB/DataStreams/AddingDefaultBlockInputStream.h

@@ -3,8 +3,10 @@
 #include <Poco/SharedPtr.h>
 
 #include <DB/DataStreams/IProfilingBlockInputStream.h>
+#include <DB/Interpreters/evaluateMissingDefaults.h>
 #include <DB/Columns/ColumnConst.h>
 
+#include <DB/Storages/ColumnDefault.h>
 
 
 namespace DB
@@ -19,12 +21,20 @@ class AddingDefaultBlockInputStream : public IProfilingBlockInputStream
 public:
 	AddingDefaultBlockInputStream(
 		BlockInputStreamPtr input_,
-		NamesAndTypesListPtr required_columns_)
+		NamesAndTypesListPtr required_columns_,
-		: required_columns(required_columns_)
+		const ColumnDefaults & column_defaults_,
+		const Context & context_)
+		: required_columns(required_columns_),
+		  column_defaults(column_defaults_), context(context_)
 	{
 		children.push_back(input_);
 	}
 
+	AddingDefaultBlockInputStream(BlockInputStreamPtr input_, NamesAndTypesListPtr required_columns_, const Context & context_)
+		: AddingDefaultBlockInputStream{input_, required_columns, {}, context}
+	{
+	}
+
 	String getName() const override { return "AddingDefaultBlockInputStream"; }
 
 	String getID() const override
@@ -45,12 +55,15 @@ protected:
 		Block res = children.back()->read();
 		if (!res)
 			return res;
-		res.addDefaults(required_columns);
+		evaluateMissingDefaults(res, *required_columns, column_defaults, context);
+		res.addDefaults(*required_columns);
 		return res;
 	}
 
 private:
 	NamesAndTypesListPtr required_columns;
+	const ColumnDefaults & column_defaults;
+	Context context;
 };
 
 }

dbms/include/DB/DataStreams/AddingDefaultBlockOutputStream.h

@@ -5,6 +5,9 @@
 #include <DB/DataStreams/IBlockOutputStream.h>
 #include <DB/Columns/ColumnConst.h>
 
+#include <DB/Storages/ColumnDefault.h>
+#include <DB/Interpreters/Context.h>
+#include <DB/Interpreters/evaluateMissingDefaults.h>
 
 
 namespace DB
@@ -19,15 +22,25 @@ class AddingDefaultBlockOutputStream : public IBlockOutputStream
 public:
 	AddingDefaultBlockOutputStream(
 		BlockOutputStreamPtr output_,
-		NamesAndTypesListPtr required_columns_)
+		NamesAndTypesListPtr required_columns_,
-		: output(output_), required_columns(required_columns_)
+		const ColumnDefaults & column_defaults_,
+		const Context & context_)
+		: output(output_), required_columns(required_columns_),
+		  column_defaults(column_defaults_), context(context_)
 	{
 	}
 
+	AddingDefaultBlockOutputStream(BlockOutputStreamPtr output_, NamesAndTypesListPtr required_columns_, const Context & context_)
+		: AddingDefaultBlockOutputStream{output_, required_columns_, {}, context_}
+	{
+	}
+
+
 	void write(const Block & block) override
 	{
 		Block res = block;
-		res.addDefaults(required_columns);
+		evaluateMissingDefaults(res, *required_columns, column_defaults, context);
+		res.addDefaults(*required_columns);
 		output->write(res);
 	}
 
@@ -39,6 +52,8 @@ public:
 private:
 	BlockOutputStreamPtr output;
 	NamesAndTypesListPtr required_columns;
+	const ColumnDefaults & column_defaults;
+	Context context;
 };
 
 

dbms/include/DB/DataStreams/MaterializingBlockOutputStream.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <DB/Columns/ColumnConst.h>
+#include <DB/DataStreams/IBlockOutputStream.h>
+#include <statdaemons/ext/range.hpp>
+
+
+namespace DB
+{
+
+/** Преобразует столбцы-константы в полноценные столбцы ("материализует" их).
+  */
+class MaterializingBlockOutputStream : public IBlockOutputStream
+{
+public:
+	MaterializingBlockOutputStream(const BlockOutputStreamPtr & output) : output{output}
+	{}
+
+	void write(const Block & original_block) override
+	{
+		/// copy block to get rid of const
+		auto block = original_block;
+
+		for (const auto i : ext::range(0, block.columns()))
+		{
+			ColumnPtr & col = block.getByPosition(i).column;
+			if (col->isConst())
+				col = dynamic_cast<IColumnConst &>(*col).convertToFullColumn();
+		}
+
+		output->write(block);
+	}
+
+	BlockOutputStreamPtr output;
+};
+
+}

dbms/include/DB/DataStreams/ProhibitColumnsBlockOutputStream.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include <DB/DataStreams/IBlockOutputStream.h>
+
+
+namespace DB
+{
+
+
+/// Throws exception on encountering prohibited column in block
+class ProhibitColumnsBlockOutputStream : public IBlockOutputStream
+{
+public:
+	ProhibitColumnsBlockOutputStream(const BlockOutputStreamPtr & output, const NamesAndTypesList & columns)
+		: output{output}, columns{columns}
+	{
+	}
+
+private:
+	void write(const Block & block) override
+	{
+        for (const auto & column : columns)
+            if (block.has(column.name))
+				throw Exception{"Cannot insert column " + column.name, ErrorCodes::ILLEGAL_COLUMN};
+
+		output->write(block);
+	}
+
+	void flush() override { output->flush(); }
+
+	void writePrefix() override { output->writePrefix(); }
+	void writeSuffix() override { output->writeSuffix(); }
+
+	BlockOutputStreamPtr output;
+	NamesAndTypesList columns;
+};
+
+
+}

dbms/include/DB/Functions/FunctionFactory.h

@@ -25,9 +25,10 @@ public:
 
 	FunctionPtr get(const String & name, const Context & context) const;
 
-	void registerFunction(const String & name, Creator creator)
+	template <typename F> void registerFunction()
 	{
-		functions[name] = creator;
+		static_assert(std::is_same<decltype(&F::create), Creator>::value, "F::create has incorrect type");
+		functions[F::name] = &F::create;
 	}
 };
 

dbms/include/DB/Functions/FunctionsArithmetic.h

@@ -367,6 +367,10 @@ struct BinaryOperationTraits
 template <template <typename, typename> class Op, typename Name>
 class FunctionBinaryArithmetic : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionBinaryArithmetic; }
+
 private:
 	/// Overload for InvalidType
 	template <typename ResultDataType,
@@ -585,7 +589,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -641,6 +645,10 @@ public:
 template <template <typename> class Op, typename Name>
 class FunctionUnaryArithmetic : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionUnaryArithmetic; }
+
 private:
 	template <typename T0>
 	bool checkType(const DataTypes & arguments, DataTypePtr & result) const
@@ -690,7 +698,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -739,19 +747,19 @@ public:
 };
 
 
-struct NamePlus 			{ static const char * get() { return "plus"; } };
+struct NamePlus 			{ static constexpr auto name = "plus"; };
-struct NameMinus 			{ static const char * get() { return "minus"; } };
+struct NameMinus 			{ static constexpr auto name = "minus"; };
-struct NameMultiply 		{ static const char * get() { return "multiply"; } };
+struct NameMultiply 		{ static constexpr auto name = "multiply"; };
-struct NameDivideFloating	{ static const char * get() { return "divide"; } };
+struct NameDivideFloating	{ static constexpr auto name = "divide"; };
-struct NameDivideIntegral 	{ static const char * get() { return "intDiv"; } };
+struct NameDivideIntegral	{ static constexpr auto name = "intDiv"; };
-struct NameModulo 			{ static const char * get() { return "modulo"; } };
+struct NameModulo			{ static constexpr auto name = "modulo"; };
-struct NameNegate 			{ static const char * get() { return "negate"; } };
+struct NameNegate			{ static constexpr auto name = "negate"; };
-struct NameBitAnd			{ static const char * get() { return "bitAnd"; } };
+struct NameBitAnd			{ static constexpr auto name = "bitAnd"; };
-struct NameBitOr			{ static const char * get() { return "bitOr"; } };
+struct NameBitOr			{ static constexpr auto name = "bitOr"; };
-struct NameBitXor			{ static const char * get() { return "bitXor"; } };
+struct NameBitXor			{ static constexpr auto name = "bitXor"; };
-struct NameBitNot			{ static const char * get() { return "bitNot"; } };
+struct NameBitNot			{ static constexpr auto name = "bitNot"; };
-struct NameBitShiftLeft		{ static const char * get() { return "bitShiftLeft"; } };
+struct NameBitShiftLeft		{ static constexpr auto name = "bitShiftLeft"; };
-struct NameBitShiftRight	{ static const char * get() { return "bitShiftRight"; } };
+struct NameBitShiftRight	{ static constexpr auto name = "bitShiftRight"; };
 
 typedef FunctionBinaryArithmetic<PlusImpl,				NamePlus> 				FunctionPlus;
 typedef FunctionBinaryArithmetic<MinusImpl, 			NameMinus> 				FunctionMinus;

dbms/include/DB/Functions/FunctionsArray.h

@@ -41,11 +41,15 @@ namespace DB
 
 class FunctionArray : public IFunction
 {
+public:
+	static constexpr auto name = "array";
+	static IFunction * create(const Context & context) { return new FunctionArray; }
+
 private:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "array";
+		return name;
 	}
 
 	template <typename T0, typename T1>
@@ -384,6 +388,10 @@ struct ArrayElementStringImpl
 
 class FunctionArrayElement : public IFunction
 {
+public:
+	static constexpr auto name = "arrayElement";
+	static IFunction * create(const Context & context) { return new FunctionArrayElement; }
+
 private:
 	template <typename T>
 	bool executeNumberConst(Block & block, const ColumnNumbers & arguments, size_t result, const Field & index)
@@ -592,7 +600,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "arrayElement";
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -755,6 +763,10 @@ struct ArrayIndexStringImpl
 template <typename IndexConv, typename Name>
 class FunctionArrayIndex : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionArrayIndex; }
+
 private:
 	typedef ColumnVector<typename IndexConv::ResultType> ResultColumnType;
 
@@ -842,7 +854,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -893,10 +905,13 @@ public:
 class FunctionArrayEnumerate : public IFunction
 {
 public:
+	static constexpr auto name = "arrayEnumerate";
+	static IFunction * create (const Context & context) { return new FunctionArrayEnumerate; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "arrayEnumerate";
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -963,10 +978,13 @@ public:
 class FunctionArrayEnumerateUniq : public IFunction
 {
 public:
+	static constexpr auto name = "arrayEnumerateUniq";
+	static IFunction * create(const Context & context) { return new FunctionArrayEnumerateUniq; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "arrayEnumerateUniq";
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1202,11 +1220,15 @@ template <> struct DataTypeToName<DataTypeDate> { static std::string get() { ret
 template <> struct DataTypeToName<DataTypeDateTime> { static std::string get() { return "DateTime"; } };
 
 template <typename DataType>
-struct EmptyArray : public IFunction
+struct FunctionEmptyArray : public IFunction
 {
+	static constexpr auto base_name = "emptyArray";
+	static const String name;
+	static IFunction * create(const Context & context) { return new FunctionEmptyArray; }
+
 	String getName() const
 	{
-		return "emptyArray" + DataTypeToName<DataType>::get();
+		return name;
 	}
 
 	DataTypePtr getReturnType(const DataTypes & arguments) const
@@ -1230,28 +1252,31 @@ struct EmptyArray : public IFunction
 	}
 };
 
+template <typename DataType>
+const String FunctionEmptyArray<DataType>::name = FunctionEmptyArray::base_name + DataTypeToName<DataType>::get();
 
-struct NameHas			{ static const char * get() { return "has"; } };
+
-struct NameIndexOf		{ static const char * get() { return "indexOf"; } };
+struct NameHas			{ static constexpr auto name = "has"; };
-struct NameCountEqual	{ static const char * get() { return "countEqual"; } };
+struct NameIndexOf		{ static constexpr auto name = "indexOf"; };
+struct NameCountEqual	{ static constexpr auto name = "countEqual"; };
 
 typedef FunctionArrayIndex<IndexToOne, 		NameHas>	FunctionHas;
 typedef FunctionArrayIndex<IndexIdentity, 	NameIndexOf>	FunctionIndexOf;
 typedef FunctionArrayIndex<IndexCount, 	NameCountEqual>	FunctionCountEqual;
 
-using FunctionEmptyArrayUInt8 = EmptyArray<DataTypeUInt8>;
+using FunctionEmptyArrayUInt8 = FunctionEmptyArray<DataTypeUInt8>;
-using FunctionEmptyArrayUInt16 = EmptyArray<DataTypeUInt16>;
+using FunctionEmptyArrayUInt16 = FunctionEmptyArray<DataTypeUInt16>;
-using FunctionEmptyArrayUInt32 = EmptyArray<DataTypeUInt32>;
+using FunctionEmptyArrayUInt32 = FunctionEmptyArray<DataTypeUInt32>;
-using FunctionEmptyArrayUInt64 = EmptyArray<DataTypeUInt64>;
+using FunctionEmptyArrayUInt64 = FunctionEmptyArray<DataTypeUInt64>;
-using FunctionEmptyArrayInt8 = EmptyArray<DataTypeInt8>;
+using FunctionEmptyArrayInt8 = FunctionEmptyArray<DataTypeInt8>;
-using FunctionEmptyArrayInt16 = EmptyArray<DataTypeInt16>;
+using FunctionEmptyArrayInt16 = FunctionEmptyArray<DataTypeInt16>;
-using FunctionEmptyArrayInt32 = EmptyArray<DataTypeInt32>;
+using FunctionEmptyArrayInt32 = FunctionEmptyArray<DataTypeInt32>;
-using FunctionEmptyArrayInt64 = EmptyArray<DataTypeInt64>;
+using FunctionEmptyArrayInt64 = FunctionEmptyArray<DataTypeInt64>;
-using FunctionEmptyArrayFloat32 = EmptyArray<DataTypeFloat32>;
+using FunctionEmptyArrayFloat32 = FunctionEmptyArray<DataTypeFloat32>;
-using FunctionEmptyArrayFloat64 = EmptyArray<DataTypeFloat64>;
+using FunctionEmptyArrayFloat64 = FunctionEmptyArray<DataTypeFloat64>;
-using FunctionEmptyArrayDate = EmptyArray<DataTypeDate>;
+using FunctionEmptyArrayDate = FunctionEmptyArray<DataTypeDate>;
-using FunctionEmptyArrayDateTime = EmptyArray<DataTypeDateTime>;
+using FunctionEmptyArrayDateTime = FunctionEmptyArray<DataTypeDateTime>;
-using FunctionEmptyArrayString = EmptyArray<DataTypeString>;
+using FunctionEmptyArrayString = FunctionEmptyArray<DataTypeString>;
 
 
 }

dbms/include/DB/Functions/FunctionsCoding.h

@@ -45,7 +45,10 @@ const auto ipv6_bytes_length = 16;
 class FunctionIPv6NumToString : public IFunction
 {
 public:
-	String getName() const { return "IPv6NumToString"; }
+	static constexpr auto name = "IPv6NumToString";
+	static IFunction * create(const Context & context) { return new FunctionIPv6NumToString; }
+
+	String getName() const { return name; }
 
 	DataTypePtr getReturnType(const DataTypes & arguments) const
 	{
@@ -247,7 +250,10 @@ public:
 class FunctionIPv6StringToNum : public IFunction
 {
 public:
-	String getName() const { return "IPv6StringToNum"; }
+	static constexpr auto name = "IPv6StringToNum";
+	static IFunction * create(const Context & context) { return new FunctionIPv6StringToNum; }
+
+	String getName() const { return name; }
 
 	DataTypePtr getReturnType(const DataTypes & arguments) const
 	{
@@ -462,10 +468,13 @@ public:
 class FunctionIPv4NumToString : public IFunction
 {
 public:
+	static constexpr auto name = "IPv4NumToString";
+	static IFunction * create(const Context & context) { return new FunctionIPv4NumToString; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "IPv4NumToString";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -564,10 +573,13 @@ public:
 class FunctionIPv4StringToNum : public IFunction
 {
 public:
+	static constexpr auto name = "IPv4StringToNum";
+	static IFunction * create(const Context & context) { return new FunctionIPv4StringToNum; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "IPv4StringToNum";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -652,10 +664,13 @@ public:
 class FunctionHex : public IFunction
 {
 public:
+	static constexpr auto name = "hex";
+	static IFunction * create(const Context & context) { return new FunctionHex; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "hex";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -897,10 +912,13 @@ public:
 class FunctionUnhex : public IFunction
 {
 public:
+	static constexpr auto name = "unhex";
+	static IFunction * create(const Context & context) { return new FunctionUnhex; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "unhex";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1002,10 +1020,13 @@ public:
 class FunctionBitmaskToArray : public IFunction
 {
 public:
+	static constexpr auto name = "bitmaskToArray";
+	static IFunction * create(const Context & context) { return new FunctionBitmaskToArray; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "bitmaskToArray";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1111,10 +1132,13 @@ public:
 class FunctionToStringCutToZero : public IFunction
 {
 public:
+	static constexpr auto name = "toStringCutToZero";
+	static IFunction * create(const Context & context) { return new FunctionToStringCutToZero; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "toStringCutToZero";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsComparison.h

@@ -385,8 +385,11 @@ template <
 	typename Name>
 class FunctionComparison : public IFunction
 {
-private:
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionComparison; };
 
+private:
 	template <typename T0, typename T1>
 	bool executeNumRightType(Block & block, const ColumnNumbers & arguments, size_t result, const ColumnVector<T0> * col_left)
 	{
@@ -567,7 +570,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -615,12 +618,12 @@ public:
 };
 
 
-struct NameEquals 			{ static const char * get() { return "equals"; } };
+struct NameEquals 			{ static constexpr auto name = "equals"; };
-struct NameNotEquals 		{ static const char * get() { return "notEquals"; } };
+struct NameNotEquals 		{ static constexpr auto name = "notEquals"; };
-struct NameLess 			{ static const char * get() { return "less"; } };
+struct NameLess 			{ static constexpr auto name = "less"; };
-struct NameGreater 			{ static const char * get() { return "greater"; } };
+struct NameGreater 			{ static constexpr auto name = "greater"; };
-struct NameLessOrEquals 	{ static const char * get() { return "lessOrEquals"; } };
+struct NameLessOrEquals 	{ static constexpr auto name = "lessOrEquals"; };
-struct NameGreaterOrEquals 	{ static const char * get() { return "greaterOrEquals"; } };
+struct NameGreaterOrEquals 	{ static constexpr auto name = "greaterOrEquals"; };
 
 typedef FunctionComparison<EqualsOp, 			NameEquals>				FunctionEquals;
 typedef FunctionComparison<NotEqualsOp, 		NameNotEquals>			FunctionNotEquals;

dbms/include/DB/Functions/FunctionsConditional.h

@@ -296,6 +296,10 @@ struct DataTypeFromFieldTypeOrError<NumberTraits::Error>
 
 class FunctionIf : public IFunction
 {
+public:
+	static constexpr auto name = "if";
+	static IFunction * create(const Context & context) { return new FunctionIf; }
+
 private:
 	template <typename T0, typename T1>
 	bool checkRightType(const DataTypes & arguments, DataTypePtr & type_res) const
@@ -473,7 +477,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "if";
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsConversion.h

@@ -51,7 +51,7 @@ struct ConvertImpl
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -91,7 +91,7 @@ struct ConvertImpl<DataTypeDate, DataTypeDateTime, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -128,7 +128,7 @@ struct ConvertImpl<DataTypeDateTime, DataTypeDate, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -178,7 +178,7 @@ struct ConvertImpl<FromDataType, DataTypeString, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -240,7 +240,7 @@ struct ConvertImpl<DataTypeString, ToDataType, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -300,7 +300,7 @@ struct ConvertImpl<DataTypeFixedString, ToDataType, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -356,7 +356,7 @@ struct ConvertImpl<DataTypeFixedString, DataTypeString, Name>
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -366,10 +366,13 @@ template <typename ToDataType, typename Name>
 class FunctionConvert : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionConvert; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -414,10 +417,13 @@ public:
 class FunctionToFixedString : public IFunction
 {
 public:
+	static constexpr auto name = "toFixedString";
+	static IFunction * create(const Context & context) { return new FunctionToFixedString; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "toFixedString";
+		return name;
 	}
 
 	/** Получить тип результата по типам аргументов и значениям константных аргументов.
@@ -515,19 +521,19 @@ private:
 };
 
 
-struct NameToUInt8 			{ static const char * get() { return "toUInt8"; } };
+struct NameToUInt8 			{ static constexpr auto name = "toUInt8"; };
-struct NameToUInt16 		{ static const char * get() { return "toUInt16"; } };
+struct NameToUInt16 		{ static constexpr auto name = "toUInt16"; };
-struct NameToUInt32 		{ static const char * get() { return "toUInt32"; } };
+struct NameToUInt32 		{ static constexpr auto name = "toUInt32"; };
-struct NameToUInt64 		{ static const char * get() { return "toUInt64"; } };
+struct NameToUInt64 		{ static constexpr auto name = "toUInt64"; };
-struct NameToInt8 			{ static const char * get() { return "toInt8"; } };
+struct NameToInt8 			{ static constexpr auto name = "toInt8"; };
-struct NameToInt16	 		{ static const char * get() { return "toInt16"; } };
+struct NameToInt16	 		{ static constexpr auto name = "toInt16"; };
-struct NameToInt32			{ static const char * get() { return "toInt32"; } };
+struct NameToInt32			{ static constexpr auto name = "toInt32"; };
-struct NameToInt64			{ static const char * get() { return "toInt64"; } };
+struct NameToInt64			{ static constexpr auto name = "toInt64"; };
-struct NameToFloat32		{ static const char * get() { return "toFloat32"; } };
+struct NameToFloat32		{ static constexpr auto name = "toFloat32"; };
-struct NameToFloat64		{ static const char * get() { return "toFloat64"; } };
+struct NameToFloat64		{ static constexpr auto name = "toFloat64"; };
-struct NameToDate			{ static const char * get() { return "toDate"; } };
+struct NameToDate			{ static constexpr auto name = "toDate"; };
-struct NameToDateTime		{ static const char * get() { return "toDateTime"; } };
+struct NameToDateTime		{ static constexpr auto name = "toDateTime"; };
-struct NameToString			{ static const char * get() { return "toString"; } };
+struct NameToString			{ static constexpr auto name = "toString"; };
 
 typedef FunctionConvert<DataTypeUInt8,		NameToUInt8> 		FunctionToUInt8;
 typedef FunctionConvert<DataTypeUInt16,		NameToUInt16> 		FunctionToUInt16;

dbms/include/DB/Functions/FunctionsDateTime.h

@@ -229,7 +229,7 @@ struct DateTimeTransformImpl
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -239,10 +239,13 @@ template <typename ToDataType, typename Transform, typename Name>
 class FunctionDateOrDateTimeToSomething : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionDateOrDateTimeToSomething; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -276,10 +279,13 @@ public:
 class FunctionNow : public IFunction
 {
 public:
+	static constexpr auto name = "now";
+	static IFunction * create(const Context & context) { return new FunctionNow; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "now";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -306,10 +312,13 @@ public:
 class FunctionToday : public IFunction
 {
 public:
+	static constexpr auto name = "today";
+	static IFunction * create(const Context & context) { return new FunctionToday; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "today";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -336,10 +345,13 @@ public:
 class FunctionYesterday : public IFunction
 {
 public:
+	static constexpr auto name = "yesterday";
+	static IFunction * create(const Context & context) { return new FunctionYesterday; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "yesterday";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -366,10 +378,13 @@ public:
 class FunctionTimeSlot : public IFunction
 {
 public:
+	static constexpr auto name = "timeSlot";
+	static IFunction * create(const Context & context) { return new FunctionTimeSlot; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "timeSlot";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -498,10 +513,13 @@ struct TimeSlotsImpl
 class FunctionTimeSlots : public IFunction
 {
 public:
+	static constexpr auto name = "timeSlots";
+	static IFunction * create(const Context & context) { return new FunctionTimeSlots; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "timeSlots";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -565,27 +583,27 @@ public:
 };
 
 
-struct NameToYear 			{ static const char * get() { return "toYear"; } };
+struct NameToYear	 			{ static constexpr auto name = "toYear"; };
-struct NameToMonth 			{ static const char * get() { return "toMonth"; } };
+struct NameToMonth	 			{ static constexpr auto name = "toMonth"; };
-struct NameToDayOfMonth		{ static const char * get() { return "toDayOfMonth"; } };
+struct NameToDayOfMonth			{ static constexpr auto name = "toDayOfMonth"; };
-struct NameToDayOfWeek		{ static const char * get() { return "toDayOfWeek"; } };
+struct NameToDayOfWeek			{ static constexpr auto name = "toDayOfWeek"; };
-struct NameToHour 			{ static const char * get() { return "toHour"; } };
+struct NameToHour	 			{ static constexpr auto name = "toHour"; };
-struct NameToMinute			{ static const char * get() { return "toMinute"; } };
+struct NameToMinute				{ static constexpr auto name = "toMinute"; };
-struct NameToSecond			{ static const char * get() { return "toSecond"; } };
+struct NameToSecond				{ static constexpr auto name = "toSecond"; };
-struct NameToMonday			{ static const char * get() { return "toMonday"; } };
+struct NameToMonday				{ static constexpr auto name = "toMonday"; };
-struct NameToStartOfMonth	{ static const char * get() { return "toStartOfMonth"; } };
+struct NameToStartOfMonth		{ static constexpr auto name = "toStartOfMonth"; };
-struct NameToStartOfQuarter	{ static const char * get() { return "toStartOfQuarter"; } };
+struct NameToStartOfQuarter		{ static constexpr auto name = "toStartOfQuarter"; };
-struct NameToStartOfYear	{ static const char * get() { return "toStartOfYear"; } };
+struct NameToStartOfYear		{ static constexpr auto name = "toStartOfYear"; };
-struct NameToStartOfMinute	{ static const char * get() { return "toStartOfMinute"; } };
+struct NameToStartOfMinute		{ static constexpr auto name = "toStartOfMinute"; };
-struct NameToStartOfHour	{ static const char * get() { return "toStartOfHour"; } };
+struct NameToStartOfHour		{ static constexpr auto name = "toStartOfHour"; };
-struct NameToTime 			{ static const char * get() { return "toTime"; } };
+struct NameToTime	 			{ static constexpr auto name = "toTime"; };
-struct NameToRelativeYearNum	{ static const char * get() { return "toRelativeYearNum"; } };
+struct NameToRelativeYearNum	{ static constexpr auto name = "toRelativeYearNum"; };
-struct NameToRelativeMonthNum	{ static const char * get() { return "toRelativeMonthNum"; } };
+struct NameToRelativeMonthNum	{ static constexpr auto name = "toRelativeMonthNum"; };
-struct NameToRelativeWeekNum	{ static const char * get() { return "toRelativeWeekNum"; } };
+struct NameToRelativeWeekNum	{ static constexpr auto name = "toRelativeWeekNum"; };
-struct NameToRelativeDayNum		{ static const char * get() { return "toRelativeDayNum"; } };
+struct NameToRelativeDayNum		{ static constexpr auto name = "toRelativeDayNum"; };
-struct NameToRelativeHourNum	{ static const char * get() { return "toRelativeHourNum"; } };
+struct NameToRelativeHourNum	{ static constexpr auto name = "toRelativeHourNum"; };
-struct NameToRelativeMinuteNum	{ static const char * get() { return "toRelativeMinuteNum"; } };
+struct NameToRelativeMinuteNum	{ static constexpr auto name = "toRelativeMinuteNum"; };
-struct NameToRelativeSecondNum	{ static const char * get() { return "toRelativeSecondNum"; } };
+struct NameToRelativeSecondNum	{ static constexpr auto name = "toRelativeSecondNum"; };
 
 
 typedef FunctionDateOrDateTimeToSomething<DataTypeUInt16,	ToYearImpl, 		NameToYear> 		FunctionToYear;

dbms/include/DB/Functions/FunctionsDictionaries.h

@@ -161,6 +161,10 @@ struct IdentityDictionaryGetter
 template <typename T, typename Transform, typename DictGetter, typename Name>
 class FunctionTransformWithDictionary : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	using base_type = FunctionTransformWithDictionary;
+
 private:
 	const SharedPtr<typename DictGetter::Src> owned_dict;
 
@@ -175,7 +179,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -211,7 +215,7 @@ public:
 
 			if (!key_col)
 				throw Exception("Illegal column " + block.getByPosition(arguments[1]).column->getName()
-					+ " of second ('point of view') argument of function " + Name::get()
+					+ " of second ('point of view') argument of function " + name
 					+ ". Must be constant string.",
 					ErrorCodes::ILLEGAL_COLUMN);
 
@@ -239,7 +243,7 @@ public:
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -249,6 +253,10 @@ public:
 template <typename T, typename Transform, typename DictGetter, typename Name>
 class FunctionIsInWithDictionary : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	using base_type = FunctionIsInWithDictionary;
+
 private:
 	const SharedPtr<typename DictGetter::Src> owned_dict;
 
@@ -263,7 +271,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -304,7 +312,7 @@ public:
 
 			if (!key_col)
 				throw Exception("Illegal column " + block.getByPosition(arguments[2]).column->getName()
-				+ " of third ('point of view') argument of function " + Name::get()
+				+ " of third ('point of view') argument of function " + name
 				+ ". Must be constant string.",
 				ErrorCodes::ILLEGAL_COLUMN);
 
@@ -368,7 +376,7 @@ public:
 		else
 			throw Exception("Illegal columns " + block.getByPosition(arguments[0]).column->getName()
 					+ " and " + block.getByPosition(arguments[1]).column->getName()
-					+ " of arguments of function " + Name::get(),
+					+ " of arguments of function " + name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -378,6 +386,10 @@ public:
 template <typename T, typename Transform, typename DictGetter, typename Name>
 class FunctionHierarchyWithDictionary : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	using base_type = FunctionHierarchyWithDictionary;
+
 private:
 	const SharedPtr<typename DictGetter::Src> owned_dict;
 
@@ -392,7 +404,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -428,7 +440,7 @@ public:
 
 			if (!key_col)
 				throw Exception("Illegal column " + block.getByPosition(arguments[1]).column->getName()
-				+ " of second ('point of view') argument of function " + Name::get()
+				+ " of second ('point of view') argument of function " + name
 				+ ". Must be constant string.",
 				ErrorCodes::ILLEGAL_COLUMN);
 
@@ -477,88 +489,197 @@ public:
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-			+ " of first argument of function " + Name::get(),
+			+ " of first argument of function " + name,
 							ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
 
 
-struct NameRegionToCity 	{ static const char * get() { return "regionToCity"; } };
+struct NameRegionToCity				{ static constexpr auto name = "regionToCity"; };
-struct NameRegionToArea 	{ static const char * get() { return "regionToArea"; } };
+struct NameRegionToArea				{ static constexpr auto name = "regionToArea"; };
-struct NameRegionToDistrict { static const char * get() { return "regionToDistrict"; } };
+struct NameRegionToDistrict			{ static constexpr auto name = "regionToDistrict"; };
-struct NameRegionToCountry 	{ static const char * get() { return "regionToCountry"; } };
+struct NameRegionToCountry			{ static constexpr auto name = "regionToCountry"; };
-struct NameRegionToContinent{ static const char * get() { return "regionToContient"; } };
+struct NameRegionToContinent		{ static constexpr auto name = "regionToContient"; };
-struct NameOSToRoot 		{ static const char * get() { return "OSToRoot"; } };
+struct NameOSToRoot					{ static constexpr auto name = "OSToRoot"; };
-struct NameSEToRoot 		{ static const char * get() { return "SEToRoot"; } };
+struct NameSEToRoot					{ static constexpr auto name = "SEToRoot"; };
-struct NameCategoryToRoot 	{ static const char * get() { return "categoryToRoot"; } };
+struct NameCategoryToRoot			{ static constexpr auto name = "categoryToRoot"; };
-struct NameCategoryToSecondLevel { static const char * get() { return "categoryToSecondLevel"; } };
+struct NameCategoryToSecondLevel	{ static constexpr auto name = "categoryToSecondLevel"; };
 
-struct NameRegionIn 		{ static const char * get() { return "regionIn"; } };
+struct NameRegionIn					{ static constexpr auto name = "regionIn"; };
-struct NameOSIn 			{ static const char * get() { return "OSIn"; } };
+struct NameOSIn						{ static constexpr auto name = "OSIn"; };
-struct NameSEIn 			{ static const char * get() { return "SEIn"; } };
+struct NameSEIn						{ static constexpr auto name = "SEIn"; };
-struct NameCategoryIn 		{ static const char * get() { return "categoryIn"; } };
+struct NameCategoryIn				{ static constexpr auto name = "categoryIn"; };
 
-struct NameRegionHierarchy	{ static const char * get() { return "regionHierarchy"; } };
+struct NameRegionHierarchy			{ static constexpr auto name = "regionHierarchy"; };
-struct NameOSHierarchy		{ static const char * get() { return "OSHierarchy"; } };
+struct NameOSHierarchy				{ static constexpr auto name = "OSHierarchy"; };
-struct NameSEHierarchy		{ static const char * get() { return "SEHierarchy"; } };
+struct NameSEHierarchy				{ static constexpr auto name = "SEHierarchy"; };
-struct NameCategoryHierarchy{ static const char * get() { return "categoryHierarchy"; } };
+struct NameCategoryHierarchy		{ static constexpr auto name = "categoryHierarchy"; };
 
 
-typedef FunctionTransformWithDictionary
+struct FunctionRegionToCity :
-	<UInt32, RegionToCityImpl,	RegionsHierarchyGetter,	NameRegionToCity> FunctionRegionToCity;
+	public FunctionTransformWithDictionary<UInt32, RegionToCityImpl,	RegionsHierarchyGetter,	NameRegionToCity>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionRegionToArea :
-	<UInt32, RegionToAreaImpl,	RegionsHierarchyGetter,	NameRegionToArea> FunctionRegionToArea;
+	public FunctionTransformWithDictionary<UInt32, RegionToAreaImpl,	RegionsHierarchyGetter,	NameRegionToArea>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionRegionToDistrict :
-	<UInt32, RegionToDistrictImpl, RegionsHierarchyGetter, NameRegionToDistrict> FunctionRegionToDistrict;
+	public FunctionTransformWithDictionary<UInt32, RegionToDistrictImpl, RegionsHierarchyGetter, NameRegionToDistrict>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionRegionToCountry :
-	<UInt32, RegionToCountryImpl, RegionsHierarchyGetter, NameRegionToCountry> FunctionRegionToCountry;
+	public FunctionTransformWithDictionary<UInt32, RegionToCountryImpl, RegionsHierarchyGetter, NameRegionToCountry>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionRegionToContinent :
-	<UInt32, RegionToContinentImpl, RegionsHierarchyGetter, NameRegionToContinent> FunctionRegionToContinent;
+	public FunctionTransformWithDictionary<UInt32, RegionToContinentImpl, RegionsHierarchyGetter, NameRegionToContinent>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionOSToRoot :
-	<UInt8, OSToRootImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSToRoot> FunctionOSToRoot;
+	public FunctionTransformWithDictionary<UInt8, OSToRootImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSToRoot>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionSEToRoot :
-	<UInt8, SEToRootImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEToRoot> FunctionSEToRoot;
+	public FunctionTransformWithDictionary<UInt8, SEToRootImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEToRoot>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionCategoryToRoot :
-	<UInt16, CategoryToRootImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryToRoot>	FunctionCategoryToRoot;
+	public FunctionTransformWithDictionary<UInt16, CategoryToRootImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryToRoot>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getCategoriesHierarchy()};
+	}
+};
 
-typedef FunctionTransformWithDictionary
+struct FunctionCategoryToSecondLevel :
-	<UInt16, CategoryToSecondLevelImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryToSecondLevel> FunctionCategoryToSecondLevel;
+	public FunctionTransformWithDictionary<UInt16, CategoryToSecondLevelImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryToSecondLevel>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getCategoriesHierarchy()};
+	}
+};
 
-typedef FunctionIsInWithDictionary
+struct FunctionRegionIn :
-	<UInt32, RegionInImpl, RegionsHierarchyGetter,	NameRegionIn> FunctionRegionIn;
+	public FunctionIsInWithDictionary<UInt32, RegionInImpl, RegionsHierarchyGetter,	NameRegionIn>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionIsInWithDictionary
+struct FunctionOSIn :
-	<UInt8,	OSInImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSIn> FunctionOSIn;
+	public FunctionIsInWithDictionary<UInt8,	OSInImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSIn>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionIsInWithDictionary
+struct FunctionSEIn :
-	<UInt8,	SEInImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEIn> FunctionSEIn;
+	public FunctionIsInWithDictionary<UInt8,	SEInImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEIn>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionIsInWithDictionary
+struct FunctionCategoryIn :
-	<UInt16, CategoryInImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryIn>	FunctionCategoryIn;
+	public FunctionIsInWithDictionary<UInt16, CategoryInImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryIn>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getCategoriesHierarchy()};
+	}
+};
 
-typedef FunctionHierarchyWithDictionary
+struct FunctionRegionHierarchy :
-	<UInt32, RegionHierarchyImpl, RegionsHierarchyGetter, NameRegionHierarchy> FunctionRegionHierarchy;
+	public FunctionHierarchyWithDictionary<UInt32, RegionHierarchyImpl, RegionsHierarchyGetter, NameRegionHierarchy>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getRegionsHierarchies()};
+	}
+};
 
-typedef FunctionHierarchyWithDictionary
+struct FunctionOSHierarchy :
-	<UInt8, OSHierarchyImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSHierarchy> FunctionOSHierarchy;
+	public FunctionHierarchyWithDictionary<UInt8, OSHierarchyImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameOSHierarchy>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionHierarchyWithDictionary
+struct FunctionSEHierarchy :
-	<UInt8, SEHierarchyImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEHierarchy> FunctionSEHierarchy;
+	public FunctionHierarchyWithDictionary<UInt8, SEHierarchyImpl, IdentityDictionaryGetter<TechDataHierarchy>, NameSEHierarchy>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getTechDataHierarchy()};
+	}
+};
 
-typedef FunctionHierarchyWithDictionary
+struct FunctionCategoryHierarchy :
-	<UInt16, CategoryHierarchyImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryHierarchy> FunctionCategoryHierarchy;
+	public FunctionHierarchyWithDictionary<UInt16, CategoryHierarchyImpl, IdentityDictionaryGetter<CategoriesHierarchy>, NameCategoryHierarchy>
+{
+	static IFunction * create(const Context & context)
+	{
+		return new base_type{context.getDictionaries().getCategoriesHierarchy()};
+	}
+};
 
 
 /// Преобразует числовой идентификатор региона в имя на заданном языке, используя словарь.
 class FunctionRegionToName : public IFunction
 {
+public:
+	static constexpr auto name = "regionToName";
+	static IFunction * create(const Context & context)
+	{
+		return new FunctionRegionToName(context.getDictionaries().getRegionsNames());
+	}
+
 private:
 	const SharedPtr<RegionsNames> owned_dict;
 
@@ -573,7 +694,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "regionToName";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsFormatting.h

@@ -18,10 +18,13 @@ namespace DB
 class FunctionBitmaskToList : public IFunction
 {
 public:
+	static constexpr auto name = "bitmaskToList";
+	static IFunction * create(const Context & context) { return new FunctionBitmaskToList; }
+
 	/// Получить основное имя функции.
 	virtual String getName() const
 	{
-		return "bitmaskToList";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsHashing.h

@@ -166,10 +166,13 @@ template <typename Impl, typename Name>
 class FunctionStringHash64 : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringHash64; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -214,7 +217,7 @@ public:
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 };
@@ -224,10 +227,13 @@ template <typename Impl>
 class FunctionStringHashFixedString : public IFunction
 {
 public:
+	static constexpr auto name = Impl::name;
+	static IFunction * create(const Context & context) { return new FunctionStringHashFixedString; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Impl::name;
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -289,6 +295,10 @@ public:
 template <typename Impl, typename Name>
 class FunctionIntHash : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionIntHash; };
+
 private:
 	typedef typename Impl::ReturnType ToType;
 
@@ -314,7 +324,7 @@ private:
 		}
 		else
 			throw Exception("Illegal column " + block.getByPosition(arguments[0]).column->getName()
-					+ " of first argument of function " + Name::get(),
+					+ " of first argument of function " + Name::name,
 				ErrorCodes::ILLEGAL_COLUMN);
 	}
 
@@ -322,7 +332,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -387,6 +397,10 @@ UInt64 toInteger<Float64>(Float64 x)
 
 class FunctionCityHash64 : public IFunction
 {
+public:
+	static constexpr auto name = "cityHash64";
+	static IFunction * create(const Context & context) { return new FunctionCityHash64; };
+
 private:
 	template <typename FromType, bool first>
 	void executeIntType(const IColumn * column, ColumnUInt64::Container_t & vec_to)
@@ -550,7 +564,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "cityHash64";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -589,11 +603,11 @@ public:
 };
 
 
-struct NameHalfMD5 			{ static const char * get() { return "halfMD5"; } };
+struct NameHalfMD5 			{ static constexpr auto name = "halfMD5"; };
-struct NameSipHash64		{ static const char * get() { return "sipHash64"; } };
+struct NameSipHash64		{ static constexpr auto name = "sipHash64"; };
-struct NameCityHash64 		{ static const char * get() { return "cityHash64"; } };
+struct NameCityHash64 		{ static constexpr auto name = "cityHash64"; };
-struct NameIntHash32 		{ static const char * get() { return "intHash32"; } };
+struct NameIntHash32 		{ static constexpr auto name = "intHash32"; };
-struct NameIntHash64 		{ static const char * get() { return "intHash64"; } };
+struct NameIntHash64 		{ static constexpr auto name = "intHash64"; };
 
 typedef FunctionStringHash64<HalfMD5Impl,		NameHalfMD5> 		FunctionHalfMD5;
 typedef FunctionStringHash64<SipHash64Impl,		NameSipHash64> 		FunctionSipHash64;

dbms/include/DB/Functions/FunctionsHigherOrder.h

@@ -381,10 +381,13 @@ template <typename Impl, typename Name>
 class FunctionArrayMapped : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionArrayMapped; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Вызывается, если хоть один агрумент функции - лямбда-выражение.
@@ -591,14 +594,14 @@ public:
 };
 
 
-struct NameArrayMap		{ static const char * get() { return "arrayMap"; } };
+struct NameArrayMap			{ static constexpr auto name = "arrayMap"; };
-struct NameArrayFilter	{ static const char * get() { return "arrayFilter"; } };
+struct NameArrayFilter		{ static constexpr auto name = "arrayFilter"; };
-struct NameArrayCount	{ static const char * get() { return "arrayCount"; } };
+struct NameArrayCount		{ static constexpr auto name = "arrayCount"; };
-struct NameArrayExists	{ static const char * get() { return "arrayExists"; } };
+struct NameArrayExists		{ static constexpr auto name = "arrayExists"; };
-struct NameArrayAll		{ static const char * get() { return "arrayAll"; } };
+struct NameArrayAll			{ static constexpr auto name = "arrayAll"; };
-struct NameArraySum		{ static const char * get() { return "arraySum"; } };
+struct NameArraySum			{ static constexpr auto name = "arraySum"; };
-struct NameArrayFirst	{ static const char * get() { return "arrayFirst"; } };
+struct NameArrayFirst		{ static constexpr auto name = "arrayFirst"; };
-struct NameArrayFirstIndex	{ static const char * get() { return "arrayFirstIndex"; } };
+struct NameArrayFirstIndex	{ static constexpr auto name = "arrayFirstIndex"; };
 
 typedef FunctionArrayMapped<ArrayMapImpl, 		NameArrayMap>		FunctionArrayMap;
 typedef FunctionArrayMapped<ArrayFilterImpl, 	NameArrayFilter>	FunctionArrayFilter;

dbms/include/DB/Functions/FunctionsLogical.h

@@ -152,6 +152,10 @@ struct AssociativeOperationImpl<Op, 1>
 template <template <typename> class Impl, typename Name>
 class FunctionAnyArityLogical : public IFunction
 {
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionAnyArityLogical; };
+
 private:
 	bool extractConstColumns(ColumnPlainPtrs & in, UInt8 & res)
 	{
@@ -240,7 +244,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -357,8 +361,11 @@ public:
 template <template <typename> class Impl, typename Name>
 class FunctionUnaryLogical : public IFunction
 {
-private:
+public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionUnaryLogical; };
 
+private:
 	template <typename T>
 	bool executeType(Block & block, const ColumnNumbers & arguments, size_t result)
 	{
@@ -391,7 +398,7 @@ public:
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -431,10 +438,10 @@ public:
 };
 
 
-struct NameAnd	{ static const char * get() { return "and"; } };
+struct NameAnd	{ static constexpr auto name = "and"; };
-struct NameOr	{ static const char * get() { return "or"; } };
+struct NameOr	{ static constexpr auto name = "or"; };
-struct NameXor	{ static const char * get() { return "xor"; } };
+struct NameXor	{ static constexpr auto name = "xor"; };
-struct NameNot	{ static const char * get() { return "not"; } };
+struct NameNot	{ static constexpr auto name = "not"; };
 
 typedef FunctionAnyArityLogical	<AndImpl,	NameAnd>	FunctionAnd;
 typedef FunctionAnyArityLogical	<OrImpl,	NameOr>		FunctionOr;

dbms/include/DB/Functions/FunctionsMiscellaneous.h

@@ -76,13 +76,16 @@ static inline void stringWidthConstant(const String & data, UInt64 & res)
 
 class FunctionCurrentDatabase : public IFunction
 {
-	const String name;
+	const String db_name;
 
 public:
-	explicit FunctionCurrentDatabase(const String & name) : name(name) {}
+	static constexpr auto name = "currentDatabase";
+	static IFunction * create(const Context & context) { return new FunctionCurrentDatabase{context.getCurrentDatabase()}; }
+
+	explicit FunctionCurrentDatabase(const String & db_name) : db_name{db_name} {}
 
 	String getName() const {
-		return "currentDatabase";
+		return name;
 	}
 
 	DataTypePtr getReturnType(const DataTypes & arguments) const
@@ -98,7 +101,7 @@ public:
 	void execute(Block & block, const ColumnNumbers & arguments, const size_t result)
 	{
 		block.getByPosition(result).column = new ColumnConstString{
-			block.rowsInFirstColumn(), name
+			block.rowsInFirstColumn(), db_name
 		};
 	}
 };
@@ -107,10 +110,13 @@ public:
 class FunctionHostName : public IFunction
 {
 public:
+	static constexpr auto name = "hostName";
+	static IFunction * create(const Context & context) { return new FunctionHostName; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "hostName";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -124,7 +130,8 @@ public:
 		return new DataTypeString;
 	}
 
-	/// Выполнить функцию над блоком.
+	/** Выполнить функцию над блоком. convertToFullColumn вызывается для того, чтобы в случае
+	 *	распределенного выполнения запроса каждый сервер возвращал свое имя хоста. */
 	void execute(Block & block, const ColumnNumbers & arguments, size_t result)
 	{
 		block.getByPosition(result).column = ColumnConstString(
@@ -136,10 +143,13 @@ public:
 class FunctionVisibleWidth : public IFunction
 {
 public:
+	static constexpr auto name = "visibleWidth";
+	static IFunction * create(const Context & context) { return new FunctionVisibleWidth; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "visibleWidth";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -161,10 +171,13 @@ public:
 class FunctionToTypeName : public IFunction
 {
 public:
+	static constexpr auto name = "toTypeName";
+	static IFunction * create(const Context & context) { return new FunctionToTypeName; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "toTypeName";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -189,10 +202,13 @@ public:
 class FunctionBlockSize : public IFunction
 {
 public:
+	static constexpr auto name = "blockSize";
+	static IFunction * create(const Context & context) { return new FunctionBlockSize; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "blockSize";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -218,10 +234,13 @@ public:
 class FunctionSleep : public IFunction
 {
 public:
+	static constexpr auto name = "sleep";
+	static IFunction * create(const Context & context) { return new FunctionSleep; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "sleep";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -284,10 +303,13 @@ public:
 class FunctionMaterialize : public IFunction
 {
 public:
+	static constexpr auto name = "materialize";
+	static IFunction * create(const Context & context) { return new FunctionMaterialize; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "materialize";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -312,23 +334,23 @@ public:
 	}
 };
 
+template <bool negative, bool global> struct FunctionInName;
+template <> struct FunctionInName<false, false>	{ static constexpr auto name = "in"; };
+template <> struct FunctionInName<false, true>	{ static constexpr auto name = "globalIn"; };
+template <> struct FunctionInName<true, false>	{ static constexpr auto name = "notIn"; };
+template <> struct FunctionInName<true, true>	{ static constexpr auto name = "globalNotIn"; };
 
+template <bool negative, bool global>
 class FunctionIn : public IFunction
 {
-private:
-	bool negative;
-	bool global;
-
 public:
-	FunctionIn(bool negative_ = false, bool global_ = false) : negative(negative_), global(global_) {}
+	static constexpr auto name = FunctionInName<negative, global>::name;
+	static IFunction * create(const Context & context) { return new FunctionIn; }
 
 	/// Получить имя функции.
 	String getName() const
 	{
-		if (global)
+		return name;
-			return negative ? "globalNotIn" : "globalIn";
-		else
-			return negative ? "notIn" : "in";
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -376,10 +398,13 @@ public:
 class FunctionTuple : public IFunction
 {
 public:
+	static constexpr auto name = "tuple";
+	static IFunction * create(const Context & context) { return new FunctionTuple; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "tuple";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -407,10 +432,13 @@ public:
 class FunctionTupleElement : public IFunction
 {
 public:
+	static constexpr auto name = "tupleElement";
+	static IFunction * create(const Context & context) { return new FunctionTupleElement; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "tupleElement";
+		return name;
 	}
 
 	void getReturnTypeAndPrerequisites(const ColumnsWithNameAndType & arguments,
@@ -471,10 +499,13 @@ public:
 class FunctionIgnore : public IFunction
 {
 public:
+	static constexpr auto name = "ignore";
+	static IFunction * create(const Context & context) { return new FunctionIgnore; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "ignore";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -494,10 +525,14 @@ public:
 class FunctionArrayJoin : public IFunction
 {
 public:
+	static constexpr auto name = "arrayJoin";
+	static IFunction * create(const Context & context) { return new FunctionArrayJoin; }
+
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "arrayJoin";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -529,10 +564,14 @@ public:
   */
 class FunctionReplicate : public IFunction
 {
+	static constexpr auto name = "replicate";
+	static IFunction * create(const Context & context) { return new FunctionReplicate; }
+
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "replicate";
+		return name;
 	}
 
 	/// Получить типы результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -575,10 +614,13 @@ class FunctionReplicate : public IFunction
 class FunctionBar : public IFunction
 {
 public:
+	static constexpr auto name = "bar";
+	static IFunction * create(const Context & context) { return new FunctionBar; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return "bar";
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsRandom.h

@@ -147,10 +147,13 @@ private:
 	typedef typename Impl::ReturnType ToType;
 
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionRandom; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -179,8 +182,8 @@ public:
 };
 
 
-struct NameRand 	{ static const char * get() { return "rand"; } };
+struct NameRand 	{ static constexpr auto name = "rand"; };
-struct NameRand64 	{ static const char * get() { return "rand64"; } };
+struct NameRand64 	{ static constexpr auto name = "rand64"; };
 
 typedef FunctionRandom<RandImpl,	NameRand> 	FunctionRand;
 typedef FunctionRandom<Rand64Impl,	NameRand64> FunctionRand64;

dbms/include/DB/Functions/FunctionsReinterpret.h

@@ -23,10 +23,13 @@ template<typename Name>
 class FunctionReinterpretAsStringImpl : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionReinterpretAsStringImpl; };
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -116,12 +119,15 @@ template<typename ToDataType, typename Name>
 class FunctionReinterpretStringAs : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionReinterpretStringAs; };
+
 	typedef typename ToDataType::FieldType ToFieldType;
 
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -202,19 +208,19 @@ public:
 };
 
 
-struct NameReinterpretAsUInt8 		{ static const char * get() { return "reinterpretAsUInt8"; } };
+struct NameReinterpretAsUInt8 		{ static constexpr auto name = "reinterpretAsUInt8"; };
-struct NameReinterpretAsUInt16		{ static const char * get() { return "reinterpretAsUInt16"; } };
+struct NameReinterpretAsUInt16		{ static constexpr auto name = "reinterpretAsUInt16"; };
-struct NameReinterpretAsUInt32		{ static const char * get() { return "reinterpretAsUInt32"; } };
+struct NameReinterpretAsUInt32		{ static constexpr auto name = "reinterpretAsUInt32"; };
-struct NameReinterpretAsUInt64		{ static const char * get() { return "reinterpretAsUInt64"; } };
+struct NameReinterpretAsUInt64		{ static constexpr auto name = "reinterpretAsUInt64"; };
-struct NameReinterpretAsInt8 		{ static const char * get() { return "reinterpretAsInt8"; } };
+struct NameReinterpretAsInt8 		{ static constexpr auto name = "reinterpretAsInt8"; };
-struct NameReinterpretAsInt16 		{ static const char * get() { return "reinterpretAsInt16"; } };
+struct NameReinterpretAsInt16 		{ static constexpr auto name = "reinterpretAsInt16"; };
-struct NameReinterpretAsInt32		{ static const char * get() { return "reinterpretAsInt32"; } };
+struct NameReinterpretAsInt32		{ static constexpr auto name = "reinterpretAsInt32"; };
-struct NameReinterpretAsInt64		{ static const char * get() { return "reinterpretAsInt64"; } };
+struct NameReinterpretAsInt64		{ static constexpr auto name = "reinterpretAsInt64"; };
-struct NameReinterpretAsFloat32	{ static const char * get() { return "reinterpretAsFloat32"; } };
+struct NameReinterpretAsFloat32		{ static constexpr auto name = "reinterpretAsFloat32"; };
-struct NameReinterpretAsFloat64	{ static const char * get() { return "reinterpretAsFloat64"; } };
+struct NameReinterpretAsFloat64		{ static constexpr auto name = "reinterpretAsFloat64"; };
-struct NameReinterpretAsDate		{ static const char * get() { return "reinterpretAsDate"; } };
+struct NameReinterpretAsDate		{ static constexpr auto name = "reinterpretAsDate"; };
-struct NameReinterpretAsDateTime	{ static const char * get() { return "reinterpretAsDateTime"; } };
+struct NameReinterpretAsDateTime	{ static constexpr auto name = "reinterpretAsDateTime"; };
-struct NameReinterpretAsString		{ static const char * get() { return "reinterpretAsString"; } };
+struct NameReinterpretAsString		{ static constexpr auto name = "reinterpretAsString"; };
 
 typedef FunctionReinterpretStringAs<DataTypeUInt8,		NameReinterpretAsUInt8>		FunctionReinterpretAsUInt8;
 typedef FunctionReinterpretStringAs<DataTypeUInt16,	NameReinterpretAsUInt16>	FunctionReinterpretAsUInt16;

dbms/include/DB/Functions/FunctionsRound.h

@@ -6,51 +6,51 @@
 
 namespace DB
 {
-	
+
 	/** Функции округления:
 	 * roundToExp2 - вниз до ближайшей степени двойки;
 	 * roundDuration - вниз до ближайшего из: 0, 1, 10, 30, 60, 120, 180, 240, 300, 600, 1200, 1800, 3600, 7200, 18000, 36000;
 	 * roundAge - вниз до ближайшего из: 0, 18, 25, 35, 45.
 	 */
-	
+
 	template<typename A>
 	struct RoundToExp2Impl
 	{
 		typedef A ResultType;
-		
+
 		static inline A apply(A x)
 		{
 			return x <= 0 ? static_cast<A>(0) : (static_cast<A>(1) << static_cast<UInt64>(log2(static_cast<double>(x))));
 		}
 	};
-	
+
 	template<>
 	struct RoundToExp2Impl<Float32>
 	{
 		typedef Float32 ResultType;
-		
+
 		static inline Float32 apply(Float32 x)
 		{
 			return static_cast<Float32>(x < 1 ? 0. : pow(2., floor(log2(x))));
 		}
 	};
-	
+
 	template<>
 	struct RoundToExp2Impl<Float64>
 	{
 		typedef Float64 ResultType;
-		
+
 		static inline Float64 apply(Float64 x)
 		{
 			return x < 1 ? 0. : pow(2., floor(log2(x)));
 		}
 	};
-	
+
 	template<typename A>
 	struct RoundDurationImpl
 	{
 		typedef UInt16 ResultType;
-		
+
 		static inline ResultType apply(A x)
 		{
 			return x < 1 ? 0
@@ -71,12 +71,12 @@ namespace DB
 				: 36000))))))))))))));
 		}
 	};
-	
+
 	template<typename A>
 	struct RoundAgeImpl
 	{
 		typedef UInt8 ResultType;
-		
+
 		static inline ResultType apply(A x)
 		{
 			return x < 18 ? 0
@@ -86,14 +86,14 @@ namespace DB
 				: 45)));
 		}
 	};
-	
+
-	
+
-	struct NameRoundToExp2		{ static const char * get() { return "roundToExp2"; } };
+	struct NameRoundToExp2		{ static constexpr auto name = "roundToExp2"; };
-	struct NameRoundDuration	{ static const char * get() { return "roundDuration"; } };
+	struct NameRoundDuration	{ static constexpr auto name = "roundDuration"; };
-	struct NameRoundAge 		{ static const char * get() { return "roundAge"; } };
+	struct NameRoundAge 		{ static constexpr auto name = "roundAge"; };
-	
+
 	typedef FunctionUnaryArithmetic<RoundToExp2Impl,	NameRoundToExp2> 	FunctionRoundToExp2;
 	typedef FunctionUnaryArithmetic<RoundDurationImpl,	NameRoundDuration>	FunctionRoundDuration;
 	typedef FunctionUnaryArithmetic<RoundAgeImpl,		NameRoundAge>		FunctionRoundAge;
-	
+
 }

dbms/include/DB/Functions/FunctionsString.h

@@ -809,10 +809,13 @@ template <typename Impl, typename Name, typename ResultType>
 class FunctionStringOrArrayToT : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringOrArrayToT; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -902,10 +905,13 @@ template <typename Impl, typename Name>
 class FunctionStringToString : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringToString; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -960,10 +966,13 @@ template <typename Impl, typename Name>
 class FunctionStringStringToString : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringStringToString; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1212,10 +1221,13 @@ template <typename Impl, typename Name>
 class FunctionStringNumNumToString : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringNumNumToString; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1287,19 +1299,19 @@ public:
 };
 
 
-struct NameEmpty 			{ static const char * get() { return "empty"; } };
+struct NameEmpty 			{ static constexpr auto name = "empty"; };
-struct NameNotEmpty 		{ static const char * get() { return "notEmpty"; } };
+struct NameNotEmpty 		{ static constexpr auto name = "notEmpty"; };
-struct NameLength 			{ static const char * get() { return "length"; } };
+struct NameLength 			{ static constexpr auto name = "length"; };
-struct NameLengthUTF8 		{ static const char * get() { return "lengthUTF8"; } };
+struct NameLengthUTF8 		{ static constexpr auto name = "lengthUTF8"; };
-struct NameLower 			{ static const char * get() { return "lower"; } };
+struct NameLower 			{ static constexpr auto name = "lower"; };
-struct NameUpper 			{ static const char * get() { return "upper"; } };
+struct NameUpper 			{ static constexpr auto name = "upper"; };
-struct NameLowerUTF8		{ static const char * get() { return "lowerUTF8"; } };
+struct NameLowerUTF8		{ static constexpr auto name = "lowerUTF8"; };
-struct NameUpperUTF8		{ static const char * get() { return "upperUTF8"; } };
+struct NameUpperUTF8		{ static constexpr auto name = "upperUTF8"; };
-struct NameReverse			{ static const char * get() { return "reverse"; } };
+struct NameReverse			{ static constexpr auto name = "reverse"; };
-struct NameReverseUTF8		{ static const char * get() { return "reverseUTF8"; } };
+struct NameReverseUTF8		{ static constexpr auto name = "reverseUTF8"; };
-struct NameConcat			{ static const char * get() { return "concat"; } };
+struct NameConcat			{ static constexpr auto name = "concat"; };
-struct NameSubstring		{ static const char * get() { return "substring"; } };
+struct NameSubstring		{ static constexpr auto name = "substring"; };
-struct NameSubstringUTF8	{ static const char * get() { return "substringUTF8"; } };
+struct NameSubstringUTF8	{ static constexpr auto name = "substringUTF8"; };
 
 typedef FunctionStringOrArrayToT<EmptyImpl<false>,		NameEmpty,		UInt8> 	FunctionEmpty;
 typedef FunctionStringOrArrayToT<EmptyImpl<true>, 		NameNotEmpty,	UInt8> 	FunctionNotEmpty;

dbms/include/DB/Functions/FunctionsStringArray.h

@@ -45,7 +45,8 @@ private:
 
 public:
 	/// Получить имя фукнции.
-	static String getName() { return "alphaTokens"; }
+	static constexpr auto name = "alphaTokens";
+	static String getName() { return name; }
 
 	/// Проверить типы агрументов функции.
 	static void checkArguments(const DataTypes & arguments)
@@ -107,7 +108,8 @@ private:
 	char sep;
 
 public:
-	static String getName() { return "splitByChar"; }
+	static constexpr auto name = "splitByChar";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -183,7 +185,8 @@ private:
 	String sep;
 
 public:
-	static String getName() { return "splitByString"; }
+	static constexpr auto name = "splitByString";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -246,7 +249,8 @@ private:
 	Pos end;
 public:
 	/// Получить имя функции.
-	static String getName() { return "extractAll"; }
+	static constexpr auto name = "extractAll";
+	static String getName() { return name; }
 
 	/// Проверить типы агрументов функции.
 	static void checkArguments( const DataTypes &  arguments )
@@ -305,10 +309,13 @@ template <typename Generator>
 class FunctionTokens : public IFunction
 {
 public:
+	static constexpr auto name = Generator::name;
+	static IFunction * create(const Context & context) { return new FunctionTokens; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Generator::getName();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.

dbms/include/DB/Functions/FunctionsStringSearch.h

@@ -870,10 +870,13 @@ template <typename Impl, typename Name>
 class FunctionStringReplace : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionStringReplace; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -954,10 +957,13 @@ template <typename Impl, typename Name>
 class FunctionsStringSearch : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionsStringSearch; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1020,10 +1026,13 @@ template <typename Impl, typename Name>
 class FunctionsStringSearchToString : public IFunction
 {
 public:
+	static constexpr auto name = Name::name;
+	static IFunction * create(const Context & context) { return new FunctionsStringSearchToString; }
+
 	/// Получить имя функции.
 	String getName() const
 	{
-		return Name::get();
+		return name;
 	}
 
 	/// Получить тип результата по типам аргументов. Если функция неприменима для данных аргументов - кинуть исключение.
@@ -1091,16 +1100,16 @@ public:
 };
 
 
-struct NamePosition 		{ static const char * get() { return "position"; } };
+struct NamePosition 		{ static constexpr auto name = "position"; };
-struct NamePositionUTF8		{ static const char * get() { return "positionUTF8"; } };
+struct NamePositionUTF8		{ static constexpr auto name = "positionUTF8"; };
-struct NameMatch			{ static const char * get() { return "match"; } };
+struct NameMatch			{ static constexpr auto name = "match"; };
-struct NameLike				{ static const char * get() { return "like"; } };
+struct NameLike				{ static constexpr auto name = "like"; };
-struct NameNotLike			{ static const char * get() { return "notLike"; } };
+struct NameNotLike			{ static constexpr auto name = "notLike"; };
-struct NameExtract			{ static const char * get() { return "extract"; } };
+struct NameExtract			{ static constexpr auto name = "extract"; };
-struct NameReplaceOne			{ static const char * get() { return "replaceOne"; } };
+struct NameReplaceOne		{ static constexpr auto name = "replaceOne"; };
-struct NameReplaceAll			{ static const char * get() { return "replaceAll"; } };
+struct NameReplaceAll		{ static constexpr auto name = "replaceAll"; };
-struct NameReplaceRegexpOne			{ static const char * get() { return "replaceRegexpOne"; } };
+struct NameReplaceRegexpOne	{ static constexpr auto name = "replaceRegexpOne"; };
-struct NameReplaceRegexpAll			{ static const char * get() { return "replaceRegexpAll"; } };
+struct NameReplaceRegexpAll	{ static constexpr auto name = "replaceRegexpAll"; };
 
 typedef FunctionsStringSearch<PositionImpl, 			NamePosition> 		FunctionPosition;
 typedef FunctionsStringSearch<PositionUTF8Impl, 		NamePositionUTF8> 	FunctionPositionUTF8;

dbms/include/DB/Functions/FunctionsURL.h

@@ -327,6 +327,11 @@ struct ExtractQueryStringAndFragment
 			res_data = pos + (without_leading_char ? 1 : 0);
 			res_size = end - res_data;
 		}
+		else if (nullptr != (pos = strchr(data, '#')))
+		{
+			res_data = pos;
+			res_size = end - res_data;
+		}
 	}
 };
 
@@ -503,7 +508,8 @@ private:
 	bool first;
 
 public:
-	static String getName() { return "extractURLParameters"; }
+	static constexpr auto name = "extractURLParameters";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -571,7 +577,8 @@ private:
 	bool first;
 
 public:
-	static String getName() { return "extractURLParameterNames"; }
+	static constexpr auto name = "extractURLParameterNames";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -639,7 +646,8 @@ private:
 	Pos end;
 
 public:
-	static String getName() { return "URLHierarchy"; }
+	static constexpr auto name = "URLHierarchy";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -737,7 +745,8 @@ private:
 	Pos start;
 
 public:
-	static String getName() { return "URLPathHierarchy"; }
+	static constexpr auto name = "URLPathHierarchy";
+	static String getName() { return name; }
 
 	static void checkArguments(const DataTypes & arguments)
 	{
@@ -924,25 +933,25 @@ struct CutSubstringImpl
 };
 
 
-struct NameProtocol 					{ static const char * get() { return "protocol"; } };
+struct NameProtocol 					{ static constexpr auto name = "protocol"; };
-struct NameDomain 						{ static const char * get() { return "domain"; } };
+struct NameDomain 						{ static constexpr auto name = "domain"; };
-struct NameDomainWithoutWWW 			{ static const char * get() { return "domainWithoutWWW"; } };
+struct NameDomainWithoutWWW 			{ static constexpr auto name = "domainWithoutWWW"; };
-struct NameFirstSignificantSubdomain	{ static const char * get() { return "firstSignificantSubdomain"; } };
+struct NameFirstSignificantSubdomain	{ static constexpr auto name = "firstSignificantSubdomain"; };
-struct NameTopLevelDomain 				{ static const char * get() { return "topLevelDomain"; } };
+struct NameTopLevelDomain 				{ static constexpr auto name = "topLevelDomain"; };
-struct NamePath 						{ static const char * get() { return "path"; } };
+struct NamePath 						{ static constexpr auto name = "path"; };
-struct NameQueryString					{ static const char * get() { return "queryString"; } };
+struct NameQueryString					{ static constexpr auto name = "queryString"; };
-struct NameFragment 					{ static const char * get() { return "fragment"; } };
+struct NameFragment 					{ static constexpr auto name = "fragment"; };
-struct NameQueryStringAndFragment		{ static const char * get() { return "queryStringAndFragment"; } };
+struct NameQueryStringAndFragment		{ static constexpr auto name = "queryStringAndFragment"; };
 
-struct NameCutToFirstSignificantSubdomain { static const char * get() { return "cutToFirstSignificantSubdomain"; } };
+struct NameCutToFirstSignificantSubdomain { static constexpr auto name = "cutToFirstSignificantSubdomain"; };
 
-struct NameCutWWW 						{ static const char * get() { return "cutWWW"; } };
+struct NameCutWWW 						{ static constexpr auto name = "cutWWW"; };
-struct NameCutQueryString				{ static const char * get() { return "cutQueryString"; } };
+struct NameCutQueryString				{ static constexpr auto name = "cutQueryString"; };
-struct NameCutFragment 					{ static const char * get() { return "cutFragment"; } };
+struct NameCutFragment 					{ static constexpr auto name = "cutFragment"; };
-struct NameCutQueryStringAndFragment 	{ static const char * get() { return "cutQueryStringAndFragment"; } };
+struct NameCutQueryStringAndFragment 	{ static constexpr auto name = "cutQueryStringAndFragment"; };
 
-struct NameExtractURLParameter 		{ static const char * get() { return "extractURLParameter"; } };
+struct NameExtractURLParameter			{ static constexpr auto name = "extractURLParameter"; };
-struct NameCutURLParameter 				{ static const char * get() { return "cutURLParameter"; } };
+struct NameCutURLParameter 				{ static constexpr auto name = "cutURLParameter"; };
 
 typedef FunctionStringToString<ExtractSubstringImpl<ExtractProtocol>, 			NameProtocol>	 		FunctionProtocol;
 typedef FunctionStringToString<ExtractSubstringImpl<ExtractDomain<false> >, 		NameDomain>	 			FunctionDomain;

dbms/include/DB/Functions/FunctionsVisitParam.h

@@ -16,16 +16,16 @@
 
 /** Функции для извлечения параметров визитов.
  *  Реализованы через шаблоны из FunctionsStringSearch.h.
- * 
+ *
  * Проверить есть ли параметр
  * 		visitParamHas
- * 
+ *
  * Извлечь числовое значение параметра
  * 		visitParamExtractUInt
  * 		visitParamExtractInt
  * 		visitParamExtractFloat
  * 		visitParamExtractBool
- * 
+ *
  * Извлечь строкое значение параметра
  * 		visitParamExtractString - значение разэскейпливается
  * 		visitParamExtractRaw
@@ -37,7 +37,7 @@ namespace DB
 struct HasParam
 {
 	typedef UInt8 ResultType;
-	
+
 	static UInt8 extract(const UInt8 * begin, const UInt8 * end)
 	{
 		return true;
@@ -48,15 +48,15 @@ template<typename NumericType>
 struct ExtractNumericType
 {
 	typedef NumericType ResultType;
-	
+
 	static ResultType extract(const UInt8 * begin, const UInt8 * end)
 	{
 		ReadBuffer in(const_cast<char *>(reinterpret_cast<const char *>(begin)), end - begin, 0);
-		
+
 		/// Учимся читать числа в двойных кавычках
 		if (!in.eof() && *in.position() == '"')
 			++in.position();
-		
+
 		ResultType x = 0;
 		if (!in.eof())
 			readText(x, in);
@@ -67,7 +67,7 @@ struct ExtractNumericType
 struct ExtractBool
 {
 	typedef UInt8 ResultType;
-	
+
 	static UInt8 extract(const UInt8 * begin, const UInt8 * end)
 	{
 		return begin + 4 <= end && 0 == strncmp(reinterpret_cast<const char *>(begin), "true", 4);
@@ -81,7 +81,7 @@ struct ExtractRaw
 	{
 		if (pos == end)
 			return;
-		
+
 		UInt8 open_char = *pos;
 		UInt8 close_char = 0;
 		switch (open_char)
@@ -96,19 +96,19 @@ struct ExtractRaw
 				close_char = '"';
 				break;
 		}
-		
+
 		if (close_char != 0)
 		{
-			size_t balance = 1;	
+			size_t balance = 1;
 			char last_char = 0;
-			
+
 			res_data.push_back(*pos);
-			
+
 			++pos;
 			for (; pos != end && balance > 0; ++pos)
 			{
 				res_data.push_back(*pos);
-				
+
 				if (open_char == '"' && *pos == '"')
 				{
 					if (last_char != '\\')
@@ -121,7 +121,7 @@ struct ExtractRaw
 					if (*pos == close_char)
 						--balance;
 				}
-				
+
 				if (last_char == '\\')
 					last_char = 0;
 				else
@@ -157,12 +157,12 @@ struct ExtractString
 		}
 		return false;
 	}
-	
+
 	static bool tryUnhex(const UInt8 * pos, const UInt8 * end, int & res)
 	{
 		if (pos + 3 >= end)
 			return false;
-		
+
 		res = 0;
 		{
 			UInt8 major, minor;
@@ -183,12 +183,12 @@ struct ExtractString
 		}
 		return true;
 	}
-	
+
 	static bool tryExtract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars_t & res_data)
 	{
 		if (pos == end || *pos != '"')
 			return false;
-		
+
 		++pos;
 		while (pos != end)
 		{
@@ -228,20 +228,20 @@ struct ExtractString
 						case 'u':
 						{
 							++pos;
-							
+
 							int unicode;
 							if (!tryUnhex(pos, end, unicode))
 								return false;
 							pos += 3;
-							
+
 							res_data.resize(res_data.size() + 6);	/// максимальный размер UTF8 многобайтовой последовательности
-							
+
 							Poco::UTF8Encoding utf8;
 							int length = utf8.convert(unicode, const_cast<UInt8 *>(&res_data[0]) + res_data.size() - 6, 6);
-							
+
 							if (!length)
 								return false;
-							
+
 							res_data.resize(res_data.size() - 6 + length);
 							break;
 						}
@@ -261,11 +261,11 @@ struct ExtractString
 		}
 		return false;
 	}
-	
+
 	static void extract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars_t & res_data)
 	{
 		size_t old_size = res_data.size();
-		
+
 		if (!tryExtract(pos, end, res_data))
 			res_data.resize(old_size);
 	}
@@ -276,7 +276,7 @@ struct ExtractString
  * на каждое вхождение поля, передавая ему указатель на часть строки,
  * где начинается вхождение значения поля.
  * ParamExtractor должен распарсить и вернуть значение нужного типа.
- * 
+ *
  * Если поле не было найдено или полю соответствует некорректное значение,
  * то используется значение по умолчанию - 0.
  */
@@ -292,7 +292,7 @@ struct ExtractParamImpl
 	{
 		/// Ищем параметр просто как подстроку вида "name":
 		needle = "\"" + needle + "\":";
-		
+
 		const UInt8 * begin = &data[0];
 		const UInt8 * pos = begin;
 		const UInt8 * end = pos + data.size();
@@ -352,10 +352,10 @@ struct ExtractParamToStringImpl
 		/// Константа 5 взята из функции, выполняющей похожую задачу FunctionsStringSearch.h::ExtractImpl
 		res_data.reserve(data.size()  / 5);
 		res_offsets.resize(offsets.size());
-		
+
 		/// Ищем параметр просто как подстроку вида "name":
 		needle = "\"" + needle + "\":";
-		
+
 		const UInt8 * begin = &data[0];
 		const UInt8 * pos = begin;
 		const UInt8 * end = pos + data.size();
@@ -381,12 +381,12 @@ struct ExtractParamToStringImpl
 				ParamExtractor::extract(pos + needle.size(), begin + offsets[i], res_data);
 
 			pos = begin + offsets[i];
-			
+
 			res_data.push_back(0);
 			res_offsets[i] = res_data.size();
 			++i;
 		}
-		
+
 		while (i < res_offsets.size())
 		{
 			res_data.push_back(0);
@@ -397,13 +397,13 @@ struct ExtractParamToStringImpl
 };
 
 
-struct NameVisitParamHas			{ static const char * get() { return "visitParamHas"; } };
+struct NameVisitParamHas			{ static constexpr auto name = "visitParamHas"; };
-struct NameVisitParamExtractUInt	{ static const char * get() { return "visitParamExtractUInt"; } };
+struct NameVisitParamExtractUInt	{ static constexpr auto name = "visitParamExtractUInt"; };
-struct NameVisitParamExtractInt		{ static const char * get() { return "visitParamExtractInt"; } };
+struct NameVisitParamExtractInt		{ static constexpr auto name = "visitParamExtractInt"; };
-struct NameVisitParamExtractFloat	{ static const char * get() { return "visitParamExtractFloat"; } };
+struct NameVisitParamExtractFloat	{ static constexpr auto name = "visitParamExtractFloat"; };
-struct NameVisitParamExtractBool	{ static const char * get() { return "visitParamExtractBool"; } };
+struct NameVisitParamExtractBool	{ static constexpr auto name = "visitParamExtractBool"; };
-struct NameVisitParamExtractRaw		{ static const char * get() { return "visitParamExtractRaw"; } };
+struct NameVisitParamExtractRaw		{ static constexpr auto name = "visitParamExtractRaw"; };
-struct NameVisitParamExtractString	{ static const char * get() { return "visitParamExtractString"; } };
+struct NameVisitParamExtractString	{ static constexpr auto name = "visitParamExtractString"; };
 
 
 typedef FunctionsStringSearch<ExtractParamImpl<HasParam>, NameVisitParamHas> FunctionVisitParamHas;
@@ -414,4 +414,4 @@ typedef FunctionsStringSearch<ExtractParamImpl<ExtractBool>, NameVisitParamExtra
 typedef FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractRaw>, NameVisitParamExtractRaw> FunctionVisitParamExtractRaw;
 typedef FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractString>, NameVisitParamExtractString> FunctionVisitParamExtractString;
 
-}
+}

dbms/include/DB/Interpreters/ExpressionAnalyzer.h

@@ -210,9 +210,11 @@ private:
 	  */
 	void collectJoinedColumns(NameSet & joined_columns, NamesAndTypesList & joined_columns_name_type);
 
+	void addStorageAliases();
+
 	/** Создать словарь алиасов.
 	  */
-	void createAliasesDict(ASTPtr & ast, int ignore_levels = 0);
+	void addASTAliases(ASTPtr & ast, int ignore_levels = 0);
 
 	/** Для узлов-звёздочек - раскрыть их в список всех столбцов.
 	  * Для узлов-литералов - подставить алиасы.

dbms/include/DB/Interpreters/InterpreterAlterQuery.h

@@ -22,7 +22,13 @@ public:
 
 	/** Изменяет список столбцов в метаданных таблицы на диске. Нужно вызывать под TableStructureLock соответствующей таблицы.
 	  */
-	static void updateMetadata(const String & database, const String & table, const NamesAndTypesList & columns, Context & context);
+	static void updateMetadata(const String & database,
+		const String & table,
+		const NamesAndTypesList & columns,
+		const NamesAndTypesList & materialized_columns,
+		const NamesAndTypesList & alias_columns,
+		const ColumnDefaults & column_defaults,
+		Context & context);
 private:
 	struct PartitionCommand
 	{
@@ -74,4 +80,5 @@ private:
 	static void parseAlter(const ASTAlterQuery::ParameterContainer & params, const DataTypeFactory & data_type_factory,
 		AlterCommands & out_alter_commands, PartitionCommands & out_partition_commands);
 };
+
 }

dbms/include/DB/Interpreters/InterpreterCreateQuery.h

@@ -2,6 +2,7 @@
 
 #include <DB/Storages/IStorage.h>
 #include <DB/Interpreters/Context.h>
+#include <DB/Storages/ColumnDefault.h>
 
 
 namespace DB
@@ -14,7 +15,7 @@ class InterpreterCreateQuery
 {
 public:
 	InterpreterCreateQuery(ASTPtr query_ptr_, Context & context_);
-	
+
 	/** В случае таблицы: добавляет созданную таблицу в контекст, а также возвращает её.
 	  * В случае БД: добавляет созданную БД в контекст и возвращает NULL.
 	  * assume_metadata_exists - не проверять наличие файла с метаданными и не создавать его
@@ -22,12 +23,22 @@ public:
 	  */
 	StoragePtr execute(bool assume_metadata_exists = false);
 
-	/** AST в список столбцов с типами и обратно. Столбцы типа Nested развернуты в список настоящих столбцов.
+	/// Список столбцов с типами в AST.
-	  */
-	static NamesAndTypesList parseColumns(ASTPtr expression_list, const DataTypeFactory & data_type_factory);
 	static ASTPtr formatColumns(const NamesAndTypesList & columns);
-	
+	static ASTPtr formatColumns(
+		NamesAndTypesList columns,
+		const NamesAndTypesList & materialized_columns,
+		const NamesAndTypesList & alias_columns,
+		const ColumnDefaults & column_defaults);
+
 private:
+	/// AST в список столбцов с типами. Столбцы типа Nested развернуты в список настоящих столбцов.
+	using ColumnsAndDefaults = std::pair<NamesAndTypesList, ColumnDefaults>;
+	ColumnsAndDefaults parseColumns(ASTPtr expression_list);
+
+	/// removes columns from the columns list and return them in a separate list
+	static NamesAndTypesList removeAndReturnColumns(ColumnsAndDefaults & columns_and_defaults, ColumnDefaultType type);
+
 	ASTPtr query_ptr;
 	Context context;
 };

dbms/include/DB/Interpreters/InterpreterDescribeQuery.h

@@ -10,6 +10,8 @@
 #include <DB/DataTypes/DataTypesNumberFixed.h>
 #include <DB/DataTypes/DataTypeString.h>
 #include <DB/Columns/ColumnString.h>
+#include <DB/Parsers/formatAST.h>
+
 
 
 namespace DB
@@ -59,13 +61,18 @@ private:
 		col.name = "name";
 		col.type = new DataTypeString;
 		col.column = col.type->createColumn();
-
 		block.insert(col);
 
 		col.name = "type";
-
 		block.insert(col);
 
+		col.name = "default_type";
+		block.insert(col);
+
+		col.name = "default_expression";
+		block.insert(col);
+
+
 		return block;
 	}
 
@@ -74,27 +81,42 @@ private:
 		const ASTDescribeQuery & ast = typeid_cast<const ASTDescribeQuery &>(*query_ptr);
 
 		NamesAndTypesList columns;
+		ColumnDefaults column_defaults;
 
 		{
 			StoragePtr table = context.getTable(ast.database, ast.table);
 			auto table_lock = table->lockStructure(false);
 			columns = table->getColumnsList();
+			columns.insert(std::end(columns), std::begin(table->alias_columns), std::end(table->alias_columns));
+			column_defaults = table->column_defaults;
 		}
 
-		ColumnString * name_column = new ColumnString;
+		ColumnWithNameAndType name_column{new ColumnString, new DataTypeString, "name"};
-		ColumnString * type_column = new ColumnString;
+		ColumnWithNameAndType type_column{new ColumnString, new DataTypeString, "type" };
+		ColumnWithNameAndType default_type_column{new ColumnString, new DataTypeString, "default_type" };
+		ColumnWithNameAndType default_expression_column{new ColumnString, new DataTypeString, "default_expression" };;
 
-		Block block;
+		for (const auto column : columns)
-		block.insert(ColumnWithNameAndType(name_column, new DataTypeString, "name"));
-		block.insert(ColumnWithNameAndType(type_column, new DataTypeString, "type"));
-
-		for (NamesAndTypesList::iterator it = columns.begin(); it != columns.end(); ++it)
 		{
-			name_column->insert(it->name);
+			name_column.column->insert(column.name);
-			type_column->insert(it->type->getName());
+			type_column.column->insert(column.type->getName());
+
+			const auto it = column_defaults.find(column.name);
+			if (it == std::end(column_defaults))
+			{
+				default_type_column.column->insertDefault();
+				default_expression_column.column->insertDefault();
+			}
+			else
+			{
+				default_type_column.column->insert(toString(it->second.type));
+				default_expression_column.column->insert(queryToString(it->second.expression));
+			}
 		}
 
-		return new OneBlockInputStream(block);
+		return new OneBlockInputStream{
+			{name_column, type_column, default_type_column, default_expression_column}
+		};
 	}
 };
 

dbms/include/DB/Interpreters/evaluateMissingDefaults.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <DB/Core/Block.h>
+#include <DB/Storages/ColumnDefault.h>
+#include <DB/Interpreters/ExpressionAnalyzer.h>
+#include <utility>
+
+namespace DB
+{
+
+inline void evaluateMissingDefaults(Block & block,
+    const NamesAndTypesList & required_columns,
+	const ColumnDefaults & column_defaults,
+	const Context & context)
+{
+	if (column_defaults.empty())
+		return;
+
+	ASTPtr default_expr_list{stdext::make_unique<ASTExpressionList>().release()};
+
+	for (const auto & column : required_columns)
+	{
+		if (block.has(column.name))
+			continue;
+
+		const auto it = column_defaults.find(column.name);
+
+		/// expressions must be cloned to prevent modification by the ExpressionAnalyzer
+		if (it != column_defaults.end())
+			default_expr_list->children.emplace_back(
+				setAlias(it->second.expression->clone(), it->first));
+	}
+
+	/// nothing to evaluate
+	if (default_expr_list->children.empty())
+		return;
+
+	/** ExpressionAnalyzer eliminates "unused" columns, in order to ensure their safety
+	 *	we are going to operate on a copy instead of  the original block */
+	Block copy_block{block};
+	/// evaluate default values for defaulted columns
+	ExpressionAnalyzer{default_expr_list, context, required_columns}.getActions(true)->execute(copy_block);
+
+	/// move evaluated columns to the original block
+	for (auto & column_name_type : copy_block.getColumns())
+		block.insert(std::move(column_name_type));
+}
+
+}

dbms/include/DB/Parsers/ASTAlterQuery.h

@@ -38,7 +38,7 @@ public:
 		  *  В запросе DROP это поле не используется
 		  *  В запросе MODIFY здесь хранится имя столбца и новый тип
 		  */
-		ASTPtr name_type;
+		ASTPtr col_decl;
 
 		/** В запросе ADD COLUMN здесь опционально хранится имя столбца, следующее после AFTER
 		  * В запросе DROP здесь хранится имя столбца для удаления
@@ -61,7 +61,7 @@ public:
 		void clone(Parameters & p) const
 		{
 			p = *this;
-			p.name_type = name_type->clone();
+			p.col_decl = col_decl->clone();
 			p.column = column->clone();
 			p.partition = partition->clone();
 		}
@@ -75,8 +75,8 @@ public:
 	void addParameters(const Parameters & params)
 	{
 		parameters.push_back(params);
-		if (params.name_type)
+		if (params.col_decl)
-			children.push_back(params.name_type);
+			children.push_back(params.col_decl);
 		if (params.column)
 			children.push_back(params.column);
 		if (params.partition)

dbms/include/DB/Parsers/ASTColumnDeclaration.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#include <DB/Parsers/IAST.h>
+
+namespace DB
+{
+
+/** Name, type, default-specifier, default-expression.
+ *  The type is optional if default-expression is specified.
+ */
+class ASTColumnDeclaration : public IAST
+{
+public:
+	String name;
+	ASTPtr type;
+	String default_specifier;
+	ASTPtr default_expression;
+
+    ASTColumnDeclaration() = default;
+    ASTColumnDeclaration(StringRange range) : IAST{range} {}
+
+	String getID() const { return "ColumnDeclaration_" + name; }
+
+	ASTPtr clone() const
+	{
+		const auto res = new ASTColumnDeclaration{*this};
+		res->children.clear();
+
+		if (type) {
+			res->type = type->clone();
+			res->children.push_back(res->type);
+		}
+
+		if (default_expression) {
+			res->default_expression = default_expression->clone();
+			res->children.push_back(res->default_expression);
+		}
+
+		return res;
+	}
+};
+
+}

dbms/include/DB/Parsers/ASTFunction.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <DB/Parsers/ASTWithAlias.h>
+#include <DB/Parsers/ASTExpressionList.h>
 #include <DB/Functions/IFunction.h>
 #include <DB/AggregateFunctions/IAggregateFunction.h>
 #include <DB/IO/WriteBufferFromString.h>
@@ -81,4 +82,37 @@ public:
 	}
 };
 
+
+template <typename... Args>
+ASTPtr makeASTFunction(const String & name, Args &&... args)
+{
+	const auto function = new ASTFunction{};
+	ASTPtr result{function};
+
+	function->name = name;
+	function->arguments = new ASTExpressionList{};
+	function->children.push_back(function->arguments);
+
+	function->arguments->children = { std::forward<Args>(args)... };
+
+	return result;
+}
+
+
+template <typename... Args>
+ASTPtr makeASTFunction(const String & name, const StringRange & function_range,
+	const StringRange & arguments_range, Args &&... args)
+{
+	const auto function = new ASTFunction{function_range};
+	ASTPtr result{function};
+
+	function->name = name;
+	function->arguments = new ASTExpressionList{arguments_range};
+	function->children.push_back(function->arguments);
+
+	function->arguments->children = { std::forward<Args>(args)... };
+
+	return result;
+}
+
 }

dbms/include/DB/Parsers/ASTWithAlias.h

@@ -21,4 +21,12 @@ public:
 	void setAlias(const String & to) override 		{ alias = to; }
 };
 
+/// helper for setting aliases and chaining result to other functions
+inline ASTPtr setAlias(ASTPtr ast, const String & alias) {
+	dynamic_cast<ASTWithAlias &>(*ast).alias = alias;
+
+	return ast;
+};
+
+
 }

dbms/include/DB/Parsers/ParserCreateQuery.h

@@ -2,9 +2,12 @@
 
 #include <DB/Parsers/IParserBase.h>
 #include <DB/Parsers/ExpressionElementParsers.h>
+#include <DB/Parsers/ExpressionListParsers.h>
 #include <DB/Parsers/ASTNameTypePair.h>
+#include <DB/Parsers/ASTColumnDeclaration.h>
 #include <DB/Parsers/ASTIdentifier.h>
 #include <DB/Parsers/CommonParsers.h>
+#include <Poco/String.h>
 
 
 namespace DB
@@ -93,6 +96,101 @@ protected:
 };
 
 
+template <class NameParser>
+class IParserColumnDeclaration : public IParserBase
+{
+protected:
+	const char * getName() const { return "column declaration"; }
+	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Expected & expected);
+};
+
+typedef IParserColumnDeclaration<ParserIdentifier> ParserColumnDeclaration;
+typedef IParserColumnDeclaration<ParserCompoundIdentifier> ParserCompoundColumnDeclaration;
+
+template <class NameParser>
+bool IParserColumnDeclaration<NameParser>::parseImpl(Pos & pos, Pos end, ASTPtr & node, Expected & expected)
+{
+	NameParser name_parser;
+	ParserIdentifierWithOptionalParameters type_parser;
+	ParserWhiteSpaceOrComments ws;
+	ParserString s_default{"DEFAULT", true, true};
+	ParserString s_materialized{"MATERIALIZED", true, true};
+	ParserString s_alias{"ALIAS", true, true};
+	ParserTernaryOperatorExpression expr_parser;
+
+	const auto begin = pos;
+	const auto reset_pos_and_return = [&pos, begin] {
+		pos = begin;
+		return false;
+	};
+
+	/// mandatory column name
+	ASTPtr name;
+	if (!name_parser.parse(pos, end, name, expected))
+		return false;
+
+	ws.ignore(pos, end, expected);
+
+	/** column name should be followed by type name if it
+	 *	is not immediately followed by {DEFAULT, MATERIALIZED, ALIAS} */
+	ASTPtr type;
+	const auto fallback_pos = pos;
+	if (!s_default.check(pos, end, expected) &&
+		!s_materialized.check(pos, end, expected) &&
+		!s_alias.check(pos, end, expected))
+	{
+		if (type_parser.parse(pos, end, type, expected))
+			ws.ignore(pos, end, expected);
+	}
+	else
+		pos = fallback_pos;
+
+	/// parse {DEFAULT, MATERIALIZED, ALIAS}
+	String default_specifier;
+	ASTPtr default_expression;
+	const auto pos_before_specifier = pos;
+	if (s_default.ignore(pos, end, expected) ||
+		s_materialized.ignore(pos, end, expected) ||
+		s_alias.ignore(pos, end, expected))
+	{
+		default_specifier = Poco::toUpper(std::string{pos_before_specifier, pos});
+
+		/// should be followed by an expression
+		ws.ignore(pos, end, expected);
+
+		if (!expr_parser.parse(pos, end, default_expression, expected))
+			return reset_pos_and_return();
+	}
+	else if (!type)
+		return reset_pos_and_return(); /// reject sole column name without type
+
+	const auto column_declaration = new ASTColumnDeclaration{StringRange{begin, pos}};
+	node = column_declaration;
+	column_declaration->name = typeid_cast<ASTIdentifier &>(*name).name;
+	if (type)
+	{
+		column_declaration->type = type;
+		column_declaration->children.push_back(std::move(type));
+	}
+
+	if (default_expression)
+	{
+		column_declaration->default_specifier = default_specifier;
+		column_declaration->default_expression = default_expression;
+		column_declaration->children.push_back(std::move(default_expression));
+	}
+
+	return true;
+}
+
+class ParserColumnDeclarationList : public IParserBase
+{
+protected:
+	const char * getName() const { return "column declaration list"; }
+	bool parseImpl(Pos & pos, Pos end, ASTPtr & node, Expected & expected);
+};
+
+
 /** ENGINE = name. */
 class ParserEngine : public IParserBase
 {

dbms/include/DB/Parsers/formatAST.h

@@ -18,6 +18,7 @@
 #include <DB/Parsers/ASTIdentifier.h>
 #include <DB/Parsers/ASTLiteral.h>
 #include <DB/Parsers/ASTNameTypePair.h>
+#include <DB/Parsers/ASTColumnDeclaration.h>
 #include <DB/Parsers/ASTAsterisk.h>
 #include <DB/Parsers/ASTOrderByElement.h>
 #include <DB/Parsers/ASTSubquery.h>
@@ -54,6 +55,7 @@ void formatAST(const ASTFunction 		& ast, std::ostream & s, size_t indent = 0, b
 void formatAST(const ASTIdentifier 		& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
 void formatAST(const ASTLiteral 		& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
 void formatAST(const ASTNameTypePair	& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
+void formatAST(const ASTColumnDeclaration	& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
 void formatAST(const ASTAsterisk		& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
 void formatAST(const ASTOrderByElement	& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);
 void formatAST(const ASTSubquery		& ast, std::ostream & s, size_t indent = 0, bool hilite = true, bool one_line = false, bool need_parens = false);

dbms/include/DB/Parsers/queryToString.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <DB/Parsers/IAST.h>
+
+namespace DB
+{
+	String queryToString(const ASTPtr & query);
+}

dbms/include/DB/Storages/AlterCommands.h

@@ -1,7 +1,7 @@
 #pragma once
+
 #include <DB/Core/NamesAndTypes.h>
-#include <DB/DataTypes/DataTypeNested.h>
+#include <DB/Storages/ColumnDefault.h>
-#include <DB/DataTypes/DataTypeArray.h>
 
 namespace DB
 {
@@ -23,6 +23,9 @@ struct AlterCommand
 	/// Для ADD и MODIFY - новый тип столбца.
 	DataTypePtr data_type;
 
+	ColumnDefaultType default_type{};
+	ASTPtr default_expression{};
+
 	/// Для ADD - после какого столбца добавить новый. Если пустая строка, добавить в конец. Добавить в начало сейчас нельзя.
 	String after_column;
 
@@ -34,87 +37,32 @@ struct AlterCommand
 		return (name_with_dot == name_type.name.substr(0, name_without_dot.length() + 1) || name_without_dot == name_type.name);
 	}
 
-	void apply(NamesAndTypesList & columns) const
+	void apply(NamesAndTypesList & columns,
-	{
+			   NamesAndTypesList & materialized_columns,
-		if (type == ADD)
+			   NamesAndTypesList & alias_columns,
-		{
+			   ColumnDefaults & column_defaults) const;
-			if (std::count_if(columns.begin(), columns.end(), std::bind(namesEqual, column_name, std::placeholders::_1)))
-				throw Exception("Cannot add column " + column_name + ": column with this name already exisits.",
-					DB::ErrorCodes::ILLEGAL_COLUMN);
 
-			if (DataTypeNested::extractNestedTableName(column_name) != column_name &&
+	AlterCommand() = default;
-				!typeid_cast<const DataTypeArray *>(&*data_type))
+	AlterCommand(const Type type, const String & column_name, const DataTypePtr & data_type,
-				throw Exception("Can't add nested column " + column_name + " of non-array type " + data_type->getName(),
+				 const ColumnDefaultType default_type, const ASTPtr & default_expression,
-					ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
+				 const String & after_column = String{})
-
+		: type{type}, column_name{column_name}, data_type{data_type}, default_type{default_type},
-			NamesAndTypesList::iterator insert_it = columns.end();
+		default_expression{default_expression}, after_column{after_column}
-			if (!after_column.empty())
+	{}
-			{
-				/// Пытаемся найти первую с конца колонку с именем column_name или с именем, начинающимся с column_name и ".".
-				/// Например "fruits.bananas"
-				/// одинаковыми считаются имена, если они совпадают целиком или name_without_dot совпадает с частью имени до точки
-				NamesAndTypesList::reverse_iterator reverse_insert_it = std::find_if(columns.rbegin(), columns.rend(),
-					std::bind(namesEqual, after_column, std::placeholders::_1));
-
-				if (reverse_insert_it == columns.rend())
-					throw Exception("Wrong column name. Cannot find column " + column_name + " to insert after",
-									DB::ErrorCodes::ILLEGAL_COLUMN);
-				else
-				{
-					/// base возвращает итератор, уже смещенный на один элемент вправо
-					insert_it = reverse_insert_it.base();
-				}
-			}
-
-			columns.insert(insert_it, NameAndTypePair(column_name, data_type));
-
-			/// Медленно, так как каждый раз копируется список
-			columns = *DataTypeNested::expandNestedColumns(columns);
-		}
-		else if (type == DROP)
-		{
-			bool is_first = true;
-			NamesAndTypesList::iterator column_it;
-			do
-			{
-				column_it = std::find_if(columns.begin(), columns.end(), std::bind(namesEqual, column_name, std::placeholders::_1));
-
-				if (column_it == columns.end())
-				{
-					if (is_first)
-						throw Exception("Wrong column name. Cannot find column " + column_name + " to drop",
-										DB::ErrorCodes::ILLEGAL_COLUMN);
-				}
-				else
-					columns.erase(column_it);
-				is_first = false;
-			}
-			while (column_it != columns.end());
-		}
-		else if (type == MODIFY)
-		{
-			NamesAndTypesList::iterator column_it = std::find_if(columns.begin(), columns.end(),
-				std::bind(namesEqual, column_name, std::placeholders::_1) );
-			if (column_it == columns.end())
-				throw Exception("Wrong column name. Cannot find column " + column_name + " to modify.",
-								DB::ErrorCodes::ILLEGAL_COLUMN);
-			column_it->type = data_type;
-		}
-		else
-			throw Exception("Wrong parameter type in ALTER query", ErrorCodes::LOGICAL_ERROR);
-	}
 };
 
+class IStorage;
+class Context;
+
 class AlterCommands : public std::vector<AlterCommand>
 {
 public:
-	void apply(NamesAndTypesList & columns) const
+	void apply(NamesAndTypesList & columns,
-	{
+			   NamesAndTypesList & materialized_columns,
-		NamesAndTypesList new_columns = columns;
+			   NamesAndTypesList & alias_columns,
-		for (const AlterCommand & command : *this)
+			   ColumnDefaults & column_defaults) const;
-			command.apply(new_columns);
+
-		columns = new_columns;
+	void validate(IStorage * table, const Context & context);
-	}
 };
 
 }

dbms/include/DB/Storages/ColumnDefault.h

@@ -0,0 +1,178 @@
+#pragma once
+
+#include <DB/Parsers/IAST.h>
+#include <DB/Parsers/queryToString.h>
+#include <DB/Parsers/ExpressionListParsers.h>
+#include <DB/IO/WriteBufferFromString.h>
+#include <unordered_map>
+
+namespace DB
+{
+	enum struct ColumnDefaultType
+	{
+		Default,
+		Materialized,
+		Alias
+	};
+}
+
+namespace std
+{
+	template<> struct hash<DB::ColumnDefaultType>
+	{
+		size_t operator()(const DB::ColumnDefaultType type) const
+		{
+			return hash<int>{}(static_cast<int>(type));
+		}
+	};
+}
+
+namespace DB
+{
+	inline ColumnDefaultType columnDefaultTypeFromString(const String & str)
+	{
+		static const std::unordered_map<String, ColumnDefaultType> map{
+			{ "DEFAULT", ColumnDefaultType::Default },
+			{ "MATERIALIZED", ColumnDefaultType::Materialized },
+			{ "ALIAS", ColumnDefaultType::Alias }
+		};
+
+		const auto it = map.find(str);
+		return it != std::end(map) ? it->second : throw Exception{"Unknown column default specifier: " + str};
+	}
+
+	inline String toString(const ColumnDefaultType type)
+	{
+		static const std::unordered_map<ColumnDefaultType, String> map{
+			{ ColumnDefaultType::Default, "DEFAULT" },
+			{ ColumnDefaultType::Materialized, "MATERIALIZED" },
+			{ ColumnDefaultType::Alias, "ALIAS" }
+		};
+
+		const auto it = map.find(type);
+		return it != std::end(map) ? it->second : throw Exception{"Invalid ColumnDefaultType"};
+	}
+
+	struct ColumnDefault
+	{
+		ColumnDefaultType type;
+		ASTPtr expression;
+	};
+
+	inline bool operator==(const ColumnDefault & lhs, const ColumnDefault & rhs)
+	{
+		return lhs.type == rhs.type && queryToString(lhs.expression) == queryToString(rhs.expression);
+	}
+
+	using ColumnDefaults = std::unordered_map<String, ColumnDefault>;
+
+	template <bool store>
+	struct ColumnsDescription
+	{
+		template <typename T> using by_value_or_cref = typename std::conditional<store, T, const T &>::type;
+		by_value_or_cref<NamesAndTypesList> columns;
+		by_value_or_cref<NamesAndTypesList> materialized;
+		by_value_or_cref<NamesAndTypesList> alias;
+		by_value_or_cref<ColumnDefaults> defaults;
+
+		String toString() const
+		{
+			String s;
+			WriteBufferFromString buf{s};
+
+			writeString("columns format version: 1\n", buf);
+			writeText(columns.size() + materialized.size() + alias.size(), buf);
+			writeString(" columns:\n", buf);
+
+			const auto write_columns = [this, &buf] (const NamesAndTypesList & columns) {
+				for (const auto & column : columns)
+				{
+					const auto it = defaults.find(column.name);
+
+					writeBackQuotedString(column.name, buf);
+					writeChar(' ', buf);
+					writeString(column.type->getName(), buf);
+					if (it == std::end(defaults))
+					{
+						writeChar('\n', buf);
+						continue;
+					}
+					else
+						writeChar('\t', buf);
+
+					writeString(DB::toString(it->second.type), buf);
+					writeChar('\t', buf);
+					writeString(queryToString(it->second.expression), buf);
+					writeChar('\n', buf);
+				}
+			};
+
+			write_columns(columns);
+			write_columns(materialized);
+			write_columns(alias);
+
+			return s;
+		}
+
+		static ColumnsDescription parse(const String & str, const DataTypeFactory & data_type_factory)
+		{
+			ReadBufferFromString buf{str};
+
+			assertString("columns format version: 1\n", buf);
+			size_t count{};
+			readText(count, buf);
+			assertString(" columns:\n", buf);
+
+			ParserTernaryOperatorExpression expr_parser;
+
+			ColumnsDescription result{};
+			for (size_t i = 0; i < count; ++i)
+			{
+				String column_name;
+				readBackQuotedString(column_name, buf);
+				assertString(" ", buf);
+
+				String type_name;
+				readString(type_name, buf);
+				auto type = data_type_factory.get(type_name);
+				if (*buf.position() == '\n')
+				{
+					assertString("\n", buf);
+
+					result.columns.emplace_back(column_name, std::move(type));
+					continue;
+				}
+				assertString("\t", buf);
+
+				String default_type_str;
+				readString(default_type_str, buf);
+				const auto default_type = columnDefaultTypeFromString(default_type_str);
+				assertString("\t", buf);
+
+				String default_expr_str;
+				readText(default_expr_str, buf);
+				assertString("\n", buf);
+
+				ASTPtr default_expr;
+				Expected expected{};
+				auto begin = default_expr_str.data();
+				const auto end = begin + default_expr_str.size();
+				if (!expr_parser.parse(begin, end, default_expr, expected))
+					throw Exception{"Could not parse default expression", DB::ErrorCodes::CANNOT_PARSE_TEXT};
+
+				if (ColumnDefaultType::Default == default_type)
+					result.columns.emplace_back(column_name, std::move(type));
+				else if (ColumnDefaultType::Materialized == default_type)
+					result.materialized.emplace_back(column_name, std::move(type));
+				else if (ColumnDefaultType::Alias == default_type)
+					result.alias.emplace_back(column_name, std::move(type));
+
+				result.defaults.emplace(column_name, ColumnDefault{default_type, default_expr});
+			}
+
+			assertEOF(buf);
+
+			return result;
+		}
+	};
+}

dbms/include/DB/Storages/Distributed/DistributedBlockOutputStream.h

@@ -1,7 +1,8 @@
 #pragma once
 
 #include <DB/Storages/StorageDistributed.h>
-#include <DB/Storages/Distributed/queryToString.h>
+
+#include <DB/Parsers/formatAST.h>
 
 #include <DB/IO/WriteBufferFromFile.h>
 #include <DB/IO/CompressedWriteBuffer.h>

dbms/include/DB/Storages/Distributed/queryToString.h

@@ -1,14 +0,0 @@
-#pragma once
-
-#include <DB/Parsers/formatAST.h>
-
-namespace DB
-{
-	inline std::string queryToString(const ASTPtr & query)
-	{
-		std::ostringstream s;
-		formatAST(*query, s, 0, false, true);
-
-		return s.str();
-	}
-}

dbms/include/DB/Storages/IStorage.h

@@ -14,6 +14,7 @@
 #include <DB/Storages/AlterCommands.h>
 #include <Poco/File.h>
 #include <Poco/RWLock.h>
+#include <statdaemons/stdext.h>
 
 
 namespace DB
@@ -107,8 +108,8 @@ public:
 		return res;
 	}
 
-	typedef Poco::SharedPtr<Poco::ScopedWriteRWLock> TableStructureWriteLockPtr;
+	typedef std::unique_ptr<Poco::ScopedWriteRWLock> TableStructureWriteLockPtr;
-	typedef Poco::SharedPtr<Poco::ScopedWriteRWLock> TableDataWriteLockPtr;
+	typedef std::unique_ptr<Poco::ScopedWriteRWLock> TableDataWriteLockPtr;
 	typedef std::pair<TableDataWriteLockPtr, TableStructureWriteLockPtr> TableFullWriteLockPtr;
 
 	/** Не дает читать структуру таблицы. Берется для ALTER, RENAME и DROP.
@@ -124,7 +125,7 @@ public:
 	  */
 	TableDataWriteLockPtr lockDataForAlter()
 	{
-		TableDataWriteLockPtr res = new Poco::ScopedWriteRWLock(data_lock);
+		auto res = stdext::make_unique<Poco::ScopedWriteRWLock>(data_lock);
 		if (is_dropped)
 			throw Exception("Table is dropped", ErrorCodes::TABLE_IS_DROPPED);
 		return res;
@@ -132,7 +133,7 @@ public:
 
 	TableStructureWriteLockPtr lockStructureForAlter()
 	{
-		TableStructureWriteLockPtr res = new Poco::ScopedWriteRWLock(structure_lock);
+		auto res = stdext::make_unique<Poco::ScopedWriteRWLock>(structure_lock);
 		if (is_dropped)
 			throw Exception("Table is dropped", ErrorCodes::TABLE_IS_DROPPED);
 		return res;
@@ -271,7 +272,7 @@ public:
 		return res;
 	}
 
-	bool is_dropped;
+	bool is_dropped{false};
 
 	/// Поддерживается ли индекс в секции IN
 	virtual bool supportsIndexForIn() const { return false; };
@@ -280,7 +281,7 @@ public:
 	virtual bool checkData() const { throw DB::Exception("Check query is not supported for " + getName() + " storage"); }
 
 protected:
-	IStorage() : is_dropped(false) {}
+	using ITableDeclaration::ITableDeclaration;
 
 private:
 	std::weak_ptr<IStorage> this_ptr;

dbms/include/DB/Storages/ITableDeclaration.h

@@ -4,6 +4,7 @@
 #include <DB/Core/NamesAndTypes.h>
 #include <DB/Core/Exception.h>
 #include <DB/Core/Block.h>
+#include <DB/Storages/ColumnDefault.h>
 
 namespace DB
 {
@@ -22,7 +23,8 @@ public:
 
 	/** Получить список имён и типов столбцов таблицы, только невиртуальные.
 	  */
-	virtual const NamesAndTypesList & getColumnsList() const = 0;
+	NamesAndTypesList getColumnsList() const;
+	const NamesAndTypesList & getColumnsListNonMaterialized() const { return getColumnsListImpl(); }
 
 	/** Получить список имён столбцов таблицы, только невиртуальные.
 	  */
@@ -36,6 +38,9 @@ public:
 	  */
 	virtual bool hasRealColumn(const String & column_name) const;
 
+	NameAndTypePair getMaterializedColumn(const String & column_name) const;
+	bool hasMaterializedColumn(const String & column_name) const;
+
 	/** Получить описание любого столбца по его имени.
 	  */
 	virtual NameAndTypePair getColumn(const String & column_name) const;
@@ -49,6 +54,7 @@ public:
 	/** То же самое, но в виде блока-образца.
 	  */
 	Block getSampleBlock() const;
+	Block getSampleBlockNonMaterialized() const;
 
 	/** Проверить, что все запрошенные имена есть в таблице и заданы корректно.
 	  * (список имён не пустой и имена не повторяются)
@@ -69,7 +75,25 @@ public:
 	  */
 	void check(const Block & block, bool need_all = false) const;
 
-	virtual ~ITableDeclaration() {}
+
+	virtual ~ITableDeclaration() = default;
+
+	ITableDeclaration() = default;
+	ITableDeclaration(
+		const NamesAndTypesList & materialized_columns,
+		const NamesAndTypesList & alias_columns,
+		const ColumnDefaults & column_defaults)
+		: materialized_columns{materialized_columns},
+		  alias_columns{alias_columns},
+		  column_defaults{column_defaults}
+	{}
+
+	NamesAndTypesList materialized_columns{};
+	NamesAndTypesList alias_columns{};
+	ColumnDefaults column_defaults{};
+
+private:
+	virtual const NamesAndTypesList & getColumnsListImpl() const = 0;
 };
 
 }

dbms/include/DB/Storages/MergeTree/MergeTreeBlockInputStream.h

@@ -107,6 +107,47 @@ protected:
 	/// Будем вызывать progressImpl самостоятельно.
 	void progress(const Progress & value) override {}
 
+	void injectRequiredColumns(NamesAndTypesList & columns) const {
+		std::set<NameAndTypePair> required_columns;
+		auto modified = false;
+
+		for (auto it = std::begin(columns); it != std::end(columns);)
+		{
+			required_columns.emplace(*it);
+
+			if (!owned_data_part->hasColumnFiles(it->name))
+			{
+				const auto default_it = storage.column_defaults.find(it->name);
+				if (default_it != std::end(storage.column_defaults))
+				{
+					IdentifierNameSet identifiers;
+					default_it->second.expression->collectIdentifierNames(identifiers);
+
+					for (const auto & identifier : identifiers)
+					{
+						if (storage.hasColumn(identifier))
+						{
+							NameAndTypePair column{identifier, storage.getDataTypeByName(identifier)};
+							if (required_columns.count(column) == 0)
+							{
+								it = columns.emplace(++it, std::move(column));
+								modified = true;
+							}
+						}
+					}
+
+					if (modified)
+						continue;
+				}
+			}
+
+			++it;
+		}
+
+		if (modified)
+			columns = NamesAndTypesList{std::begin(required_columns), std::end(required_columns)};
+	}
+
 	Block readImpl()
 	{
 		Block res;
@@ -120,6 +161,9 @@ protected:
 			/// NOTE В конструкторе это делать не получилось бы, потому что тогда ещё не установлен progress_callback.
 			progressImpl(Progress(0, 0, total_rows));
 
+			injectRequiredColumns(columns);
+			injectRequiredColumns(pre_columns);
+
 			UncompressedCache * uncompressed_cache = use_uncompressed_cache ? storage.context.getUncompressedCache() : NULL;
 			reader.reset(new MergeTreeReader(path, owned_data_part->name, columns, uncompressed_cache, storage, all_mark_ranges));
 			if (prewhere_actions)

dbms/include/DB/Storages/MergeTree/MergeTreeData.h

@@ -585,6 +585,9 @@ public:
 	  * require_part_metadata - обязательно ли в директории с куском должны быть checksums.txt и columns.txt
 	  */
 	MergeTreeData(	const String & full_path_, NamesAndTypesListPtr columns_,
+					const NamesAndTypesList & materialized_columns_,
+					const NamesAndTypesList & alias_columns_,
+					const ColumnDefaults & column_defaults_,
 					const Context & context_,
 					ASTPtr & primary_expr_ast_,
 					const String & date_column_name_,
@@ -613,7 +616,7 @@ public:
 		throw Exception("Logical error: calling method getTableName of not a table.", ErrorCodes::LOGICAL_ERROR);
 	}
 
-	const NamesAndTypesList & getColumnsList() const { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	NameAndTypePair getColumn(const String & column_name) const
 	{
@@ -621,14 +624,16 @@ public:
 			return NameAndTypePair("_part", new DataTypeString);
 		if (column_name == "_part_index")
 			return NameAndTypePair("_part_index", new DataTypeUInt64);
-		return getRealColumn(column_name);
+		return ITableDeclaration::getColumn(column_name);
 	}
 
 	bool hasColumn(const String & column_name) const
 	{
-		if (column_name == "_part") return true;
+		if (column_name == "_part")
-		if (column_name == "_part_index") return true;
+			return true;
-		return hasRealColumn(column_name);
+		if (column_name == "_part_index")
+			return true;
+		return ITableDeclaration::hasColumn(column_name);
 	}
 
 	String getFullPath() const { return full_path; }

dbms/include/DB/Storages/MergeTree/MergeTreeReader.h

@@ -10,6 +10,7 @@
 #include <DB/IO/CompressedReadBufferFromFile.h>
 #include <DB/Columns/ColumnArray.h>
 #include <DB/Columns/ColumnNested.h>
+#include <DB/Interpreters/evaluateMissingDefaults.h>
 
 
 namespace DB
@@ -124,7 +125,7 @@ public:
 				storage.reportBrokenPart(part_name);
 
 			/// Более хорошая диагностика.
-			throw Exception(e.message() + " (while reading from part " + path + " from mark " + toString(from_mark) + " to "
+			throw Exception(e.message() +  "\n(while reading from part " + path + " from mark " + toString(from_mark) + " to "
 				+ toString(to_mark) + ")", e.code());
 		}
 		catch (...)
@@ -161,7 +162,8 @@ public:
 			size_t pos = 0;	/// Позиция, куда надо вставить недостающий столбец.
 			for (NamesAndTypesList::const_iterator it = columns.begin(); it != columns.end(); ++it, ++pos)
 			{
-				if (!res.has(it->name))
+				/// insert default values only for columns without default expressions
+				if (!res.has(it->name) && storage.column_defaults.count(it->name) == 0)
 				{
 					ColumnWithNameAndType column;
 					column.name = it->name;
@@ -192,11 +194,15 @@ public:
 					res.insert(pos, column);
 				}
 			}
+
+			/// evaluate defaulted columns
+			evaluateMissingDefaults(res, columns, storage.column_defaults, storage.context);
 		}
 		catch (const Exception & e)
 		{
 			/// Более хорошая диагностика.
-			throw Exception(e.message() + " (while reading from part " + path + ")", e.code());
+			throw Exception(e.message() + '\n' + e.getStackTrace().toString()
+				+ "\n(while reading from part " + path + ")", e.code());
 		}
 	}
 

dbms/include/DB/Storages/StorageBuffer.h

@@ -56,7 +56,7 @@ public:
 	std::string getName() const override { return "Buffer"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageChunkMerger.h

@@ -21,6 +21,9 @@ public:
 		const std::string & this_database_,/// Имя БД для этой таблицы.
 		const std::string & name_,			/// Имя таблицы.
 		NamesAndTypesListPtr columns_,		/// Список столбцов.
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		const String & source_database_,	/// В какой БД искать таблицы-источники.
 		const String & table_name_regexp_,	/// Регексп имён таблиц-источников.
 		const std::string & destination_name_prefix_, /// Префикс имен создаваемых таблиц типа Chunks.
@@ -30,7 +33,7 @@ public:
 	std::string getName() const override { return "ChunkMerger"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 	NameAndTypePair getColumn(const String & column_name) const override;
 	bool hasColumn(const String & column_name) const override;
 
@@ -70,6 +73,9 @@ private:
 		const std::string & this_database_,
 		const std::string & name_,
 		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		const String & source_database_,
 		const String & table_name_regexp_,
 		const std::string & destination_name_prefix_,

dbms/include/DB/Storages/StorageChunkRef.h

@@ -5,7 +5,7 @@
 
 namespace DB
 {
-	
+
 /** Ссылка на кусок данных в таблице типа Chunks.
 	* Запись не поддерживается.
 	*/
@@ -13,11 +13,11 @@ class StorageChunkRef : public IStorage
 {
 public:
 	static StoragePtr create(const std::string & name_, const Context & context_, const std::string & source_database_name_, const std::string & source_table_name_, bool attach);
-	
+
 	std::string getName() const override { return "ChunkRef"; }
 	std::string getTableName() const override { return name; }
-	
+
-	const NamesAndTypesList & getColumnsList() const override { return getSource().getColumnsList(); }
+	const NamesAndTypesList & getColumnsListImpl() const override { return getSource().getColumnsListImpl(); }
 	/// В таблице, на которую мы ссылаемся, могут быть виртуальные столбцы.
 	NameAndTypePair getColumn(const String & column_name) const override { return getSource().getColumn(column_name); };
 	bool hasColumn(const String & column_name) const override { return getSource().hasColumn(column_name); };
@@ -31,23 +31,23 @@ public:
 		unsigned threads = 1) override;
 
 	ASTPtr getCustomCreateQuery(const Context & context) const;
-	
+
 	void drop() override;
-	
+
 	String source_database_name;
 	String source_table_name;
 
 	bool checkData() const override;
-	
+
 private:
 	String name;
 	const Context & context;
-	
+
 	StorageChunkRef(const std::string & name_, const Context & context_, const std::string & source_database_name_, const std::string & source_table_name_, bool attach);
 
 	/// TODO: может быть, можно просто хранить указатель на родительскую таблицу?
 	StorageChunks & getSource();
 	const StorageChunks & getSource() const;
 };
-	
+
 }

dbms/include/DB/Storages/StorageChunks.h

@@ -7,7 +7,7 @@
 
 namespace DB
 {
-	
+
 /** Хранит несколько кусков данных. Читает из всех кусков.
   * Запись не поддерживается. Для записи используются таблицы типа ChunkMerger.
   * Таблицы типа ChunkRef могут ссылаться на отдельные куски внутри таблицы типа Chunks.
@@ -20,17 +20,20 @@ class StorageChunks : public StorageLog
 using StorageLog::read;
 public:
 	static StoragePtr create(const std::string & path_,
-							const std::string & name_,
+							 const std::string & name_,
-							const std::string & database_name_,
+							 const std::string & database_name_,
-							NamesAndTypesListPtr columns_,
+							 NamesAndTypesListPtr columns_,
-							Context & context_,
+							 const NamesAndTypesList & materialized_columns_,
-							bool attach);
+							 const NamesAndTypesList & alias_columns_,
-	
+							 const ColumnDefaults & column_defaults_,
+							 Context & context_,
+							 bool attach);
+
 	void addReference();
 	void removeReference();
-	
+
 	std::string getName() const override { return "Chunks"; }
-	
+
 	BlockInputStreams read(
 		const Names & column_names,
 		ASTPtr query,
@@ -53,13 +56,13 @@ public:
 
 	BlockOutputStreamPtr writeToNewChunk(
 		const std::string & chunk_name);
-	
+
 	/// Если бы запись была разрешена, непонятно, как назвать новый чанк.
 	BlockOutputStreamPtr write(ASTPtr query) override
 	{
 		throw Exception("Table doesn't support writing", ErrorCodes::NOT_IMPLEMENTED);
 	}
-	
+
 	/// Переименование испортило бы целостность количества ссылок из таблиц ChunkRef.
 	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override
 	{
@@ -79,29 +82,32 @@ private:
 	typedef std::vector<String> ChunkNumToChunkName;
 
 	String database_name;
-	
+
 	ChunkNumToMark chunk_num_to_marks;
 	ChunkIndices chunk_indices;
 	ChunkNumToChunkName chunk_names;
-	
+
 	CounterInFile reference_counter;
 	Context & context;
-	
+
 	Logger * log;
-	
+
 	StorageChunks(const std::string & path_,
-				const std::string & name_,
+				  const std::string & name_,
-				const std::string & database_name_,
+				  const std::string & database_name_,
-				NamesAndTypesListPtr columns_,
+				  NamesAndTypesListPtr columns_,
-				Context & context_,
+				  const NamesAndTypesList & materialized_columns_,
-				bool attach);
+				  const NamesAndTypesList & alias_columns_,
-	
+				  const ColumnDefaults & column_defaults_,
+				  Context & context_,
+				  bool attach);
+
 	void dropThis();
-	
+
 	void loadIndex();
 	void appendChunkToIndex(const std::string & chunk_name, size_t mark);
 
 	Block getBlockWithVirtualColumns() const;
 };
-	
+
 }

dbms/include/DB/Storages/StorageDistributed.h

@@ -25,6 +25,9 @@ public:
 	static StoragePtr create(
 		const std::string & name_,			/// Имя таблицы.
 		NamesAndTypesListPtr columns_,		/// Список столбцов.
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		const String & remote_database_,	/// БД на удалённых серверах.
 		const String & remote_table_,		/// Имя таблицы на удалённых серверах.
 		const String & cluster_name,
@@ -46,7 +49,7 @@ public:
 	bool supportsFinal() const override { return true; }
 	bool supportsPrewhere() const override { return true; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 	NameAndTypePair getColumn(const String & column_name) const override;
 	bool hasColumn(const String & column_name) const override;
 
@@ -88,6 +91,19 @@ private:
 		const ASTPtr & sharding_key_ = nullptr,
 		const String & data_path_ = String{});
 
+	StorageDistributed(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		const String & remote_database_,
+		const String & remote_table_,
+		Cluster & cluster_,
+		Context & context_,
+		const ASTPtr & sharding_key_ = nullptr,
+		const String & data_path_ = String{});
+
 
 	/// create directory monitor thread by subdirectory name
 	void createDirectoryMonitor(const std::string & name);

dbms/include/DB/Storages/StorageFactory.h

@@ -23,6 +23,9 @@ public:
 		Context & context,
 		ASTPtr & query,
 		NamesAndTypesListPtr columns,
+		const NamesAndTypesList & materialized_columns,
+		const NamesAndTypesList & alias_columns,
+		const ColumnDefaults & column_defaults,
 		bool attach) const;
 };
 

dbms/include/DB/Storages/StorageLog.h

@@ -64,11 +64,11 @@ private:
 			if (offset)
 				plain.seek(offset);
 		}
-		
+
 		ReadBufferFromFile plain;
 		CompressedReadBuffer compressed;
 	};
-	
+
 	typedef std::map<std::string, std::unique_ptr<Stream> > FileStreams;
 	FileStreams streams;
 
@@ -97,7 +97,7 @@ private:
 		{
 			plain_offset = Poco::File(data_path).getSize();
 		}
-		
+
 		WriteBufferFromFile plain;
 		CompressedWriteBuffer compressed;
 
@@ -111,12 +111,12 @@ private:
 	};
 
 	typedef std::vector<std::pair<size_t, Mark> > MarksForColumns;
-	
+
 	typedef std::map<std::string, std::unique_ptr<Stream> > FileStreams;
 	FileStreams streams;
-	
+
 	typedef std::set<std::string> OffsetColumns;
-	
+
 	WriteBufferFromFile marks_stream; /// Объявлен ниже lock, чтобы файл открывался при захваченном rwlock.
 
 	void addStream(const String & name, const IDataType & type, size_t level = 0);
@@ -143,12 +143,21 @@ public:
 		const std::string & path_,
 		const std::string & name_,
 		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
-	
+
+	static StoragePtr create(
+		const std::string & path_,
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
+
 	std::string getName() const override { return "Log"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	virtual BlockInputStreams read(
 		const Names & column_names,
@@ -196,16 +205,23 @@ protected:
 		throw Exception("There is no column " + _table_column_name + " in table " + getTableName(), ErrorCodes::NO_SUCH_COLUMN_IN_TABLE);
 	}
 
-	StorageLog(const std::string & path_, const std::string & name_, NamesAndTypesListPtr columns_, size_t max_compress_block_size_);
+	StorageLog(
-	
+		const std::string & path_,
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		size_t max_compress_block_size_);
+
 	/// Прочитать файлы с засечками, если они ещё не прочитаны.
 	/// Делается лениво, чтобы при большом количестве таблиц, сервер быстро стартовал.
 	/// Нельзя вызывать с залоченным на запись rwlock.
 	void loadMarks();
-	
+
 	/// Можно вызывать при любом состоянии rwlock.
 	size_t marksCount();
-	
+
 	BlockInputStreams read(
 		size_t from_mark,
 		size_t to_mark,
@@ -215,14 +231,14 @@ protected:
 		QueryProcessingStage::Enum & processed_stage,
 		size_t max_block_size = DEFAULT_BLOCK_SIZE,
 		unsigned threads = 1);
-	
+
 private:
 	Files_t files; /// name -> data
 
 	Names column_names; /// column_index -> name
-	
+
 	Poco::File marks_file;
-	
+
 	/// Порядок добавления файлов не должен меняться: он соответствует порядку столбцов в файле с засечками.
 	void addFile(const String & column_name, const IDataType & type, size_t level = 0);
 

dbms/include/DB/Storages/StorageMaterializedView.h

@@ -9,8 +9,16 @@ namespace DB
 class StorageMaterializedView : public StorageView {
 
 public:
-	static StoragePtr create(const String & table_name_, const String & database_name_,
+	static StoragePtr create(
-		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_, bool attach_);
+		const String & table_name_,
+		const String & database_name_,
+		Context & context_,
+		ASTPtr & query_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		bool attach_);
 
 	std::string getName() const override { return "MaterializedView"; }
 	std::string getInnerTableName() const { return  ".inner." + table_name; }
@@ -37,8 +45,16 @@ public:
 private:
 	StoragePtr data;
 
-	StorageMaterializedView(const String & table_name_, const String & database_name_,
+	StorageMaterializedView(
-		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_,	bool attach_);
+		const String & table_name_,
+		const String & database_name_,
+		Context & context_,
+		ASTPtr & query_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		bool attach_);
 };
 
 }

dbms/include/DB/Storages/StorageMemory.h

@@ -62,12 +62,21 @@ friend class MemoryBlockInputStream;
 friend class MemoryBlockOutputStream;
 
 public:
-	static StoragePtr create(const std::string & name_, NamesAndTypesListPtr columns_);
+	static StoragePtr create(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_);
+
+	static StoragePtr create(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_);
 
 	std::string getName() const override { return "Memory"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	size_t getSize() const { return data.size(); }
 
@@ -93,7 +102,16 @@ private:
 
 	Poco::FastMutex mutex;
 
-	StorageMemory(const std::string & name_, NamesAndTypesListPtr columns_);
+	StorageMemory(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_);
+
+	StorageMemory(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_);
 };
 
 }

dbms/include/DB/Storages/StorageMerge.h

@@ -25,6 +25,16 @@ public:
 		const String & table_name_regexp_,	/// Регексп имён таблиц-источников.
 		const Context & context_);			/// Известные таблицы.
 
+	static StoragePtr create(
+		const std::string & name_,			/// Имя таблицы.
+		NamesAndTypesListPtr columns_,		/// Список столбцов.
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		const String & source_database_,	/// В какой БД искать таблицы-источники.
+		const String & table_name_regexp_,	/// Регексп имён таблиц-источников.
+		const Context & context_);			/// Известные таблицы.
+
 	std::string getName() const override { return "Merge"; }
 	std::string getTableName() const override { return name; }
 	bool supportsSampling() const override { return true; }
@@ -32,9 +42,9 @@ public:
 	/// Проверка откладывается до метода read. Там проверяется поддержка PREWHERE у использующихся таблиц.
 	bool supportsPrewhere() const override { return true; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
-	NameAndTypePair getColumn(const String & column_name) const override;
+	NameAndTypePair getColumn(const String &column_name) const override;
-	bool hasColumn(const String & column_name) const override;
+	bool hasColumn(const String &column_name) const override;
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -65,6 +75,16 @@ private:
 		const String & table_name_regexp_,
 		const Context & context_);
 
+	StorageMerge(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		const String & source_database_,
+		const String & table_name_regexp_,
+		const Context & context_);
+
 	void getSelectedTables(StorageVector & selected_tables) const;
 
 	Block getBlockWithVirtualColumns(const StorageVector & selected_tables) const;

dbms/include/DB/Storages/StorageMergeTree.h

@@ -24,7 +24,27 @@ public:
 	  * date_column_name 	- имя столбца с датой;
 	  * index_granularity 	- на сколько строчек пишется одно значение индекса.
 	  */
-	static StoragePtr create(const String & path_, const String & database_name_, const String & table_name_,
+	static StoragePtr create(
+		const String & path_,
+		const String & database_name_,
+		const String & table_name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		Context & context_,
+		ASTPtr & primary_expr_ast_,
+		const String & date_column_name_,
+		const ASTPtr & sampling_expression_, /// nullptr, если семплирование не поддерживается.
+		size_t index_granularity_,
+		MergeTreeData::Mode mode_ = MergeTreeData::Ordinary,
+		const String & sign_column_ = "",
+		const MergeTreeSettings & settings_ = MergeTreeSettings());
+
+	static StoragePtr create(
+		const String & path_,
+		const String & database_name_,
+		const String & table_name_,
 		NamesAndTypesListPtr columns_,
 		Context & context_,
 		ASTPtr & primary_expr_ast_,
@@ -35,6 +55,7 @@ public:
 		const String & sign_column_ = "",
 		const MergeTreeSettings & settings_ = MergeTreeSettings());
 
+
 	void shutdown() override;
 	~StorageMergeTree() override;
 
@@ -48,7 +69,7 @@ public:
 	bool supportsFinal() const override { return data.supportsFinal(); }
 	bool supportsPrewhere() const override { return data.supportsPrewhere(); }
 
-	const NamesAndTypesList & getColumnsList() const override { return data.getColumnsList(); }
+	const NamesAndTypesList & getColumnsListImpl() const override { return data.getColumnsListNonMaterialized(); }
 
 	NameAndTypePair getColumn(const String & column_name) const override
 	{
@@ -157,16 +178,22 @@ private:
 
 	typedef Poco::SharedPtr<CurrentlyMergingPartsTagger> CurrentlyMergingPartsTaggerPtr;
 
-	StorageMergeTree(const String & path_, const String & database_name_, const String & table_name_,
+	StorageMergeTree(
-					NamesAndTypesListPtr columns_,
+		const String & path_,
-					Context & context_,
+		const String & database_name_,
-					ASTPtr & primary_expr_ast_,
+		const String & table_name_,
-					const String & date_column_name_,
+		NamesAndTypesListPtr columns_,
-					const ASTPtr & sampling_expression_, /// nullptr, если семплирование не поддерживается.
+		const NamesAndTypesList & materialized_columns_,
-					size_t index_granularity_,
+		const NamesAndTypesList & alias_columns_,
-					MergeTreeData::Mode mode_,
+		const ColumnDefaults & column_defaults_,
-					const String & sign_column_,
+		Context & context_,
-					const MergeTreeSettings & settings_);
+		ASTPtr & primary_expr_ast_,
+		const String & date_column_name_,
+		const ASTPtr & sampling_expression_, /// nullptr, если семплирование не поддерживается.
+		size_t index_granularity_,
+		MergeTreeData::Mode mode_,
+		const String & sign_column_,
+		const MergeTreeSettings & settings_);
 
 	/** Определяет, какие куски нужно объединять, и объединяет их.
 	  * Если aggressive - выбрать куски, не обращая внимание на соотношение размеров и их новизну (для запроса OPTIMIZE).

dbms/include/DB/Storages/StorageNull.h

@@ -15,15 +15,20 @@ namespace DB
 class StorageNull : public IStorage
 {
 public:
-	static StoragePtr create(const std::string & name_, NamesAndTypesListPtr columns_)
+	static StoragePtr create(
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_)
 	{
-		return (new StorageNull(name_, columns_))->thisPtr();
+		return (new StorageNull{name_, columns_, materialized_columns_, alias_columns_, column_defaults_})->thisPtr();
 	}
 
 	std::string getName() const override { return "Null"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -47,8 +52,13 @@ private:
 	String name;
 	NamesAndTypesListPtr columns;
 
-    StorageNull(const std::string & name_, NamesAndTypesListPtr columns_)
+    StorageNull(
-		: name(name_), columns(columns_) {}
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_)
+		: IStorage{materialized_columns_, alias_columns_, column_defaults_}, name(name_), columns(columns_) {}
 };
 
 }

dbms/include/DB/Storages/StorageReplicatedMergeTree.h

@@ -31,6 +31,9 @@ public:
 		bool attach,
 		const String & path_, const String & database_name_, const String & name_,
 		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		Context & context_,
 		ASTPtr & primary_expr_ast_,
 		const String & date_column_name_,
@@ -53,7 +56,7 @@ public:
 	bool supportsFinal() const override { return data.supportsFinal(); }
 	bool supportsPrewhere() const override { return data.supportsPrewhere(); }
 
-	const NamesAndTypesList & getColumnsList() const override { return data.getColumnsList(); }
+	const NamesAndTypesList & getColumnsListImpl() const override { return data.getColumnsListNonMaterialized(); }
 
 	NameAndTypePair getColumn(const String & column_name) const override
 	{
@@ -248,6 +251,9 @@ private:
 		bool attach,
 		const String & path_, const String & database_name_, const String & name_,
 		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		Context & context_,
 		ASTPtr & primary_expr_ast_,
 		const String & date_column_name_,

dbms/include/DB/Storages/StorageSystemDatabases.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemDatabases"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemEvents.h

@@ -21,7 +21,7 @@ public:
 	std::string getName() const override { return "SystemEvents"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemMerges.h

@@ -13,7 +13,7 @@ public:
 	std::string getName() const override { return "SystemMerges"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 	BlockInputStreams read(
 		const Names & column_names,
 		ASTPtr query,

dbms/include/DB/Storages/StorageSystemNumbers.h

@@ -19,11 +19,11 @@ class StorageSystemNumbers : public IStorage
 {
 public:
 	static StoragePtr create(const std::string & name_, bool multithreaded_ = false);
-	
+
 	std::string getName() const override { return "SystemNumbers"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -37,7 +37,7 @@ private:
 	const std::string name;
 	NamesAndTypesList columns;
 	bool multithreaded;
-	
+
 	StorageSystemNumbers(const std::string & name_, bool multithreaded_);
 };
 

dbms/include/DB/Storages/StorageSystemOne.h

@@ -16,11 +16,11 @@ class StorageSystemOne : public IStorage
 {
 public:
 	static StoragePtr create(const std::string & name_);
-	
+
 	std::string getName() const override { return "SystemOne"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -33,7 +33,7 @@ public:
 private:
 	const std::string name;
 	NamesAndTypesList columns;
-	
+
 	StorageSystemOne(const std::string & name_);
 };
 

dbms/include/DB/Storages/StorageSystemParts.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const  override{ return "SystemParts"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemProcesses.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemProcesses"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemReplicas.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemReplicas"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemSettings.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemSettings"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageSystemTables.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemTables"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -38,6 +38,8 @@ private:
 	NamesAndTypesList columns;
 
 	StorageSystemTables(const std::string & name_, const Context & context_);
+
+	ColumnWithNameAndType getFilteredDatabases(ASTPtr query);
 };
 
 }

dbms/include/DB/Storages/StorageSystemZooKeeper.h

@@ -22,7 +22,7 @@ public:
 	std::string getName() const override { return "SystemZooKeeper"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,

dbms/include/DB/Storages/StorageTinyLog.h

@@ -29,7 +29,7 @@ public:
 	String getName() const { return "TinyLogBlockInputStream"; }
 
 	String getID() const;
-	
+
 protected:
 	Block readImpl();
 private:
@@ -89,7 +89,7 @@ private:
 
 	typedef std::map<std::string, std::unique_ptr<Stream> > FileStreams;
 	FileStreams streams;
-	
+
 	typedef std::set<std::string> OffsetColumns;
 
 	void addStream(const String & name, const IDataType & type, size_t level = 0);
@@ -115,13 +115,16 @@ public:
 		const std::string & path_,
 		const std::string & name_,
 		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
 		bool attach,
 		size_t max_compress_block_size_ = DEFAULT_MAX_COMPRESS_BLOCK_SIZE);
 
 	std::string getName() const override { return "TinyLog"; }
 	std::string getTableName() const override { return name; }
 
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 
 	BlockInputStreams read(
 		const Names & column_names,
@@ -134,7 +137,7 @@ public:
 	BlockOutputStreamPtr write(ASTPtr query) override;
 
 	void drop() override;
-	
+
 	void rename(const String & new_path_to_db, const String & new_database_name, const String & new_table_name) override;
 
 	bool checkData() const override;
@@ -148,7 +151,7 @@ public:
 
 	Files_t & getFiles();
 
-	std::string full_path() { return path + escapeForFileName(name) + '/';} 
+	std::string full_path() { return path + escapeForFileName(name) + '/';}
 
 private:
 	String path;
@@ -163,8 +166,16 @@ private:
 
 	Logger * log;
 
-	StorageTinyLog(const std::string & path_, const std::string & name_, NamesAndTypesListPtr columns_, bool attach, size_t max_compress_block_size_);
+	StorageTinyLog(
-	
+		const std::string & path_,
+		const std::string & name_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_,
+		bool attach,
+		size_t max_compress_block_size_);
+
 	void addFile(const String & column_name, const IDataType & type, size_t level = 0);
 };
 

dbms/include/DB/Storages/StorageView.h

@@ -11,12 +11,19 @@ class StorageView : public IStorage
 {
 
 public:
-	static StoragePtr create(const String & table_name_, const String & database_name_,
+	static StoragePtr create(
-		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_);
+		const String & table_name_,
+		const String & database_name_,
+		Context & context_,
+		ASTPtr & query_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_);
 
 	std::string getName() const override { return "View"; }
 	std::string getTableName() const override { return table_name; }
-	const NamesAndTypesList & getColumnsList() const override { return *columns; }
+	const NamesAndTypesList & getColumnsListImpl() const override { return *columns; }
 	ASTPtr getInnerQuery() const { return inner_query.clone(); };
 
 	/// Пробрасывается внутрь запроса и решается на его уровне.
@@ -42,8 +49,15 @@ protected:
 	Context & context;
 	NamesAndTypesListPtr columns;
 
-	StorageView(const String & table_name_, const String & database_name_,
+	StorageView(
-		Context & context_,	ASTPtr & query_, NamesAndTypesListPtr columns_);
+		const String & table_name_,
+		const String & database_name_,
+		Context & context_,
+		ASTPtr & query_,
+		NamesAndTypesListPtr columns_,
+		const NamesAndTypesList & materialized_columns_,
+		const NamesAndTypesList & alias_columns_,
+		const ColumnDefaults & column_defaults_);
 };
 
 }

dbms/include/DB/TableFunctions/TableFunctionMerge.h

@@ -48,7 +48,8 @@ public:
 		/// Нам необходимо его пометить как имя базы данных, поскольку по умолчанию стоит значение column
 		typeid_cast<ASTIdentifier &>(*args[0]).kind = ASTIdentifier::Database;
 
-		return StorageMerge::create(getName(), chooseColumns(source_database, table_name_regexp, context), source_database, table_name_regexp, context);
+		return StorageMerge::create(getName(), chooseColumns(source_database, table_name_regexp, context),
+			source_database, table_name_regexp, context);
 	}
 
 private:

dbms/src/Core/Block.cpp

@@ -5,9 +5,17 @@
 
 #include <DB/Core/Block.h>
 
+#include <DB/Storages/ColumnDefault.h>
+
 #include <DB/Columns/ColumnArray.h>
 #include <DB/DataTypes/DataTypeNested.h>
 
+#include <DB/Parsers/ASTExpressionList.h>
+#include <DB/Interpreters/ExpressionAnalyzer.h>
+#include <statdaemons/stdext.h>
+
+#include <DB/Parsers/formatAST.h>
+
 
 namespace DB
 {
@@ -19,20 +27,11 @@ Block::Block(const Block & other)
 }
 
 
-void Block::addDefaults(NamesAndTypesListPtr required_columns)
+void Block::addDefaults(const NamesAndTypesList & required_columns)
 {
-	for (NamesAndTypesList::const_iterator it = required_columns->begin(); it != required_columns->end(); ++it)
+	for (const auto & column : required_columns)
-	{
+		if (!has(column.name))
-		if (!has(it->name))
+			insertDefault(column.name, column.type);
-		{
-			ColumnWithNameAndType col;
-			col.name = it->name;
-			col.type = it->type;
-			col.column = dynamic_cast<IColumnConst &>(*it->type->createConstColumn(
-				rows(), it->type->getDefault())).convertToFullColumn();
-			insert(col);
-		}
-	}
 }
 
 Block & Block::operator= (const Block & other)
@@ -82,6 +81,16 @@ void Block::insert(const ColumnWithNameAndType & elem)
 	index_by_position.push_back(it);
 }
 
+void Block::insertDefault(const String & name, const DataTypePtr & type)
+{
+	insert({
+		dynamic_cast<IColumnConst &>(*type->createConstColumn(rows(),
+			type->getDefault())).convertToFullColumn(),
+		type, name
+	});
+}
+
+
 
 void Block::insertUnique(const ColumnWithNameAndType & elem)
 {

dbms/src/Functions/FunctionsArithmetic.cpp

@@ -6,23 +6,19 @@ namespace DB
 
 void registerFunctionsArithmetic(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionPlus>();
-
+	factory.registerFunction<FunctionMinus>();
-	factory.registerFunction("plus", 			F { return new FunctionPlus; });
+	factory.registerFunction<FunctionMultiply>();
-	factory.registerFunction("minus", 			F { return new FunctionMinus; });
+	factory.registerFunction<FunctionDivideFloating>();
-	factory.registerFunction("multiply", 		F { return new FunctionMultiply; });
+	factory.registerFunction<FunctionDivideIntegral>();
-	factory.registerFunction("divide", 			F { return new FunctionDivideFloating; });
+	factory.registerFunction<FunctionModulo>();
-	factory.registerFunction("intDiv", 			F { return new FunctionDivideIntegral; });
+	factory.registerFunction<FunctionNegate>();
-	factory.registerFunction("modulo", 			F { return new FunctionModulo; });
+	factory.registerFunction<FunctionBitAnd>();
-	factory.registerFunction("negate", 			F { return new FunctionNegate; });
+	factory.registerFunction<FunctionBitOr>();
-	factory.registerFunction("bitAnd", 			F { return new FunctionBitAnd; });
+	factory.registerFunction<FunctionBitXor>();
-	factory.registerFunction("bitOr", 			F { return new FunctionBitOr; });
+	factory.registerFunction<FunctionBitNot>();
-	factory.registerFunction("bitXor", 			F { return new FunctionBitXor; });
+	factory.registerFunction<FunctionBitShiftLeft>();
-	factory.registerFunction("bitNot", 			F { return new FunctionBitNot; });
+	factory.registerFunction<FunctionBitShiftRight>();
-	factory.registerFunction("bitShiftLeft", 	F { return new FunctionBitShiftLeft; });
-	factory.registerFunction("bitShiftRight", 	F { return new FunctionBitShiftRight; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsArray.cpp

@@ -6,31 +6,26 @@ namespace DB
 
 void registerFunctionsArray(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction *
+	factory.registerFunction<FunctionArray>();
-
+	factory.registerFunction<FunctionArrayElement>();
-	factory.registerFunction("array", 				F { return new FunctionArray; });
+	factory.registerFunction<FunctionHas>();
-	factory.registerFunction("arrayElement", 		F { return new FunctionArrayElement; });
+	factory.registerFunction<FunctionIndexOf>();
-	factory.registerFunction("has", 				F { return new FunctionHas; });
+	factory.registerFunction<FunctionCountEqual>();
-	factory.registerFunction("indexOf", 			F { return new FunctionIndexOf; });
+	factory.registerFunction<FunctionArrayEnumerate>();
-	factory.registerFunction("countEqual", 			F { return new FunctionCountEqual; });
+	factory.registerFunction<FunctionArrayEnumerateUniq>();
-	factory.registerFunction("arrayEnumerate", 		F { return new FunctionArrayEnumerate; });
+	factory.registerFunction<FunctionEmptyArrayUInt8>();
-	factory.registerFunction("arrayEnumerateUniq", 	F { return new FunctionArrayEnumerateUniq; });
+	factory.registerFunction<FunctionEmptyArrayUInt16>();
-	factory.registerFunction("emptyArrayUInt8",		F { return new FunctionEmptyArrayUInt8; });
+	factory.registerFunction<FunctionEmptyArrayUInt32>();
-	factory.registerFunction("emptyArrayUInt16",	F { return new FunctionEmptyArrayUInt16; });
+	factory.registerFunction<FunctionEmptyArrayUInt64>();
-	factory.registerFunction("emptyArrayUInt32",	F { return new FunctionEmptyArrayUInt32; });
+	factory.registerFunction<FunctionEmptyArrayInt8>();
-	factory.registerFunction("emptyArrayUInt64",	F { return new FunctionEmptyArrayUInt64; });
+	factory.registerFunction<FunctionEmptyArrayInt16>();
-	factory.registerFunction("emptyArrayInt8",		F { return new FunctionEmptyArrayInt8; });
+	factory.registerFunction<FunctionEmptyArrayInt32>();
-	factory.registerFunction("emptyArrayInt16",		F { return new FunctionEmptyArrayInt16; });
+	factory.registerFunction<FunctionEmptyArrayInt64>();
-	factory.registerFunction("emptyArrayInt32",		F { return new FunctionEmptyArrayInt32; });
+	factory.registerFunction<FunctionEmptyArrayFloat32>();
-	factory.registerFunction("emptyArrayInt64",		F { return new FunctionEmptyArrayInt64; });
+	factory.registerFunction<FunctionEmptyArrayFloat64>();
-	factory.registerFunction("emptyArrayFloat32",	F { return new FunctionEmptyArrayFloat32; });
+	factory.registerFunction<FunctionEmptyArrayDate>();
-	factory.registerFunction("emptyArrayFloat64",	F { return new FunctionEmptyArrayFloat64; });
+	factory.registerFunction<FunctionEmptyArrayDateTime>();
-	factory.registerFunction("emptyArrayDate",		F { return new FunctionEmptyArrayDate; });
+	factory.registerFunction<FunctionEmptyArrayString>();
-	factory.registerFunction("emptyArrayDateTime",	F { return new FunctionEmptyArrayDateTime; });
-	factory.registerFunction("emptyArrayString",	F { return new FunctionEmptyArrayString; });
-
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsCoding.cpp

@@ -6,18 +6,14 @@ namespace DB
 
 void registerFunctionsCoding(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction *
+	factory.registerFunction<FunctionToStringCutToZero>();
-
+	factory.registerFunction<FunctionIPv6NumToString>();
-	factory.registerFunction("toStringCutToZero", 	F { return new FunctionToStringCutToZero; });
+	factory.registerFunction<FunctionIPv6StringToNum>();
-	factory.registerFunction("IPv6NumToString",		F { return new FunctionIPv6NumToString; });
+	factory.registerFunction<FunctionIPv4NumToString>();
-	factory.registerFunction("IPv6StringToNum",		F { return new FunctionIPv6StringToNum; });
+	factory.registerFunction<FunctionIPv4StringToNum>();
-	factory.registerFunction("IPv4NumToString", 	F { return new FunctionIPv4NumToString; });
+	factory.registerFunction<FunctionHex>();
-	factory.registerFunction("IPv4StringToNum", 	F { return new FunctionIPv4StringToNum; });
+	factory.registerFunction<FunctionUnhex>();
-	factory.registerFunction("hex", 				F { return new FunctionHex; });
+	factory.registerFunction<FunctionBitmaskToArray>();
-	factory.registerFunction("unhex", 				F { return new FunctionUnhex; });
-	factory.registerFunction("bitmaskToArray",		F { return new FunctionBitmaskToArray; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsComparison.cpp

@@ -6,16 +6,12 @@ namespace DB
 
 void registerFunctionsComparison(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionEquals>();
-
+	factory.registerFunction<FunctionNotEquals>();
-	factory.registerFunction("equals", 			F { return new FunctionEquals; });
+	factory.registerFunction<FunctionLess>();
-	factory.registerFunction("notEquals", 		F { return new FunctionNotEquals; });
+	factory.registerFunction<FunctionGreater>();
-	factory.registerFunction("less", 			F { return new FunctionLess; });
+	factory.registerFunction<FunctionLessOrEquals>();
-	factory.registerFunction("greater", 		F { return new FunctionGreater; });
+	factory.registerFunction<FunctionGreaterOrEquals>();
-	factory.registerFunction("lessOrEquals", 	F { return new FunctionLessOrEquals; });
-	factory.registerFunction("greaterOrEquals", F { return new FunctionGreaterOrEquals; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsConditional.cpp

@@ -6,11 +6,7 @@ namespace DB
 
 void registerFunctionsConditional(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionIf>();
-
-	factory.registerFunction("if", F { return new FunctionIf; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsConversion.cpp

@@ -6,24 +6,20 @@ namespace DB
 
 void registerFunctionsConversion(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionToUInt8>();
-
+	factory.registerFunction<FunctionToUInt16>();
-	factory.registerFunction("toUInt8", 		F { return new FunctionToUInt8; });
+	factory.registerFunction<FunctionToUInt32>();
-	factory.registerFunction("toUInt16", 		F { return new FunctionToUInt16; });
+	factory.registerFunction<FunctionToUInt64>();
-	factory.registerFunction("toUInt32", 		F { return new FunctionToUInt32; });
+	factory.registerFunction<FunctionToInt8>();
-	factory.registerFunction("toUInt64", 		F { return new FunctionToUInt64; });
+	factory.registerFunction<FunctionToInt16>();
-	factory.registerFunction("toInt8", 			F { return new FunctionToInt8; });
+	factory.registerFunction<FunctionToInt32>();
-	factory.registerFunction("toInt16", 		F { return new FunctionToInt16; });
+	factory.registerFunction<FunctionToInt64>();
-	factory.registerFunction("toInt32", 		F { return new FunctionToInt32; });
+	factory.registerFunction<FunctionToFloat32>();
-	factory.registerFunction("toInt64", 		F { return new FunctionToInt64; });
+	factory.registerFunction<FunctionToFloat64>();
-	factory.registerFunction("toFloat32", 		F { return new FunctionToFloat32; });
+	factory.registerFunction<FunctionToDate>();
-	factory.registerFunction("toFloat64", 		F { return new FunctionToFloat64; });
+	factory.registerFunction<FunctionToDateTime>();
-	factory.registerFunction("toDate", 			F { return new FunctionToDate; });
+	factory.registerFunction<FunctionToString>();
-	factory.registerFunction("toDateTime", 		F { return new FunctionToDateTime; });
+	factory.registerFunction<FunctionToFixedString>();
-	factory.registerFunction("toString", 		F { return new FunctionToString; });
-	factory.registerFunction("toFixedString", 	F { return new FunctionToFixedString; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsDateTime.cpp

@@ -6,36 +6,32 @@ namespace DB
 
 void registerFunctionsDateTime(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionToYear>();
-
+	factory.registerFunction<FunctionToMonth>();
-	factory.registerFunction("toYear", 				F { return new FunctionToYear; });
+	factory.registerFunction<FunctionToDayOfMonth>();
-	factory.registerFunction("toMonth",				F { return new FunctionToMonth; });
+	factory.registerFunction<FunctionToDayOfWeek>();
-	factory.registerFunction("toDayOfMonth", 		F { return new FunctionToDayOfMonth; });
+	factory.registerFunction<FunctionToHour>();
-	factory.registerFunction("toDayOfWeek", 		F { return new FunctionToDayOfWeek; });
+	factory.registerFunction<FunctionToMinute>();
-	factory.registerFunction("toHour", 				F { return new FunctionToHour; });
+	factory.registerFunction<FunctionToSecond>();
-	factory.registerFunction("toMinute", 			F { return new FunctionToMinute; });
+	factory.registerFunction<FunctionToMonday>();
-	factory.registerFunction("toSecond", 			F { return new FunctionToSecond; });
+	factory.registerFunction<FunctionToStartOfMonth>();
-	factory.registerFunction("toMonday", 			F { return new FunctionToMonday; });
+	factory.registerFunction<FunctionToStartOfQuarter>();
-	factory.registerFunction("toStartOfMonth", 		F { return new FunctionToStartOfMonth; });
+	factory.registerFunction<FunctionToStartOfYear>();
-	factory.registerFunction("toStartOfQuarter", 	F { return new FunctionToStartOfQuarter; });
+	factory.registerFunction<FunctionToStartOfMinute>();
-	factory.registerFunction("toStartOfYear", 		F { return new FunctionToStartOfYear; });
+	factory.registerFunction<FunctionToStartOfHour>();
-	factory.registerFunction("toStartOfMinute", 	F { return new FunctionToStartOfMinute; });
+	factory.registerFunction<FunctionToRelativeYearNum>();
-	factory.registerFunction("toStartOfHour", 		F { return new FunctionToStartOfHour; });
+	factory.registerFunction<FunctionToRelativeMonthNum>();
-	factory.registerFunction("toRelativeYearNum", 	F { return new FunctionToRelativeYearNum; });
+	factory.registerFunction<FunctionToRelativeWeekNum>();
-	factory.registerFunction("toRelativeMonthNum", 	F { return new FunctionToRelativeMonthNum; });
+	factory.registerFunction<FunctionToRelativeDayNum>();
-	factory.registerFunction("toRelativeWeekNum", 	F { return new FunctionToRelativeWeekNum; });
+	factory.registerFunction<FunctionToRelativeHourNum>();
-	factory.registerFunction("toRelativeDayNum", 	F { return new FunctionToRelativeDayNum; });
+	factory.registerFunction<FunctionToRelativeMinuteNum>();
-	factory.registerFunction("toRelativeHourNum", 	F { return new FunctionToRelativeHourNum; });
+	factory.registerFunction<FunctionToRelativeSecondNum>();
-	factory.registerFunction("toRelativeMinuteNum", F { return new FunctionToRelativeMinuteNum; });
+	factory.registerFunction<FunctionToTime>();
-	factory.registerFunction("toRelativeSecondNum", F { return new FunctionToRelativeSecondNum; });
+	factory.registerFunction<FunctionNow>();
-	factory.registerFunction("toTime", 				F { return new FunctionToTime; });
+	factory.registerFunction<FunctionToday>();
-	factory.registerFunction("now", 				F { return new FunctionNow; });
+	factory.registerFunction<FunctionYesterday>();
-	factory.registerFunction("today", 				F { return new FunctionToday; });
+	factory.registerFunction<FunctionTimeSlot>();
-	factory.registerFunction("yesterday", 			F { return new FunctionYesterday; });
+	factory.registerFunction<FunctionTimeSlots>();
-	factory.registerFunction("timeSlot", 			F { return new FunctionTimeSlot; });
-	factory.registerFunction("timeSlots", 			F { return new FunctionTimeSlots; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsDictionaries.cpp

@@ -6,46 +6,24 @@ namespace DB
 
 void registerFunctionsDictionaries(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionRegionToCity>();
-
+	factory.registerFunction<FunctionRegionToArea>();
-	factory.registerFunction("regionToCity",
+	factory.registerFunction<FunctionRegionToDistrict>();
-		F { return new FunctionRegionToCity(context.getDictionaries().getRegionsHierarchies()); });
+	factory.registerFunction<FunctionRegionToCountry>();
-	factory.registerFunction("regionToArea",
+	factory.registerFunction<FunctionRegionToContinent>();
-		F { return new FunctionRegionToArea(context.getDictionaries().getRegionsHierarchies()); });
+	factory.registerFunction<FunctionOSToRoot>();
-	factory.registerFunction("regionToDistrict",
+	factory.registerFunction<FunctionSEToRoot>();
-		F { return new FunctionRegionToDistrict(context.getDictionaries().getRegionsHierarchies()); });
+	factory.registerFunction<FunctionCategoryToRoot>();
-	factory.registerFunction("regionToCountry",
+	factory.registerFunction<FunctionCategoryToSecondLevel>();
-		F { return new FunctionRegionToCountry(context.getDictionaries().getRegionsHierarchies()); });
+	factory.registerFunction<FunctionRegionIn>();
-	factory.registerFunction("regionToContinent",
+	factory.registerFunction<FunctionOSIn>();
-		F { return new FunctionRegionToContinent(context.getDictionaries().getRegionsHierarchies()); });
+	factory.registerFunction<FunctionSEIn>();
-	factory.registerFunction("OSToRoot",
+	factory.registerFunction<FunctionCategoryIn>();
-		F { return new FunctionOSToRoot(context.getDictionaries().getTechDataHierarchy()); });
+	factory.registerFunction<FunctionRegionHierarchy>();
-	factory.registerFunction("SEToRoot",
+	factory.registerFunction<FunctionOSHierarchy>();
-		F { return new FunctionSEToRoot(context.getDictionaries().getTechDataHierarchy()); });
+	factory.registerFunction<FunctionSEHierarchy>();
-	factory.registerFunction("categoryToRoot",
+	factory.registerFunction<FunctionCategoryHierarchy>();
-		F { return new FunctionCategoryToRoot(context.getDictionaries().getCategoriesHierarchy()); });
+	factory.registerFunction<FunctionRegionToName>();
-	factory.registerFunction("categoryToSecondLevel",
-		F { return new FunctionCategoryToSecondLevel(context.getDictionaries().getCategoriesHierarchy()); });
-	factory.registerFunction("regionIn",
-		F { return new FunctionRegionIn(context.getDictionaries().getRegionsHierarchies()); });
-	factory.registerFunction("OSIn",
-		F { return new FunctionOSIn(context.getDictionaries().getTechDataHierarchy()); });
-	factory.registerFunction("SEIn",
-		F { return new FunctionSEIn(context.getDictionaries().getTechDataHierarchy()); });
-	factory.registerFunction("categoryIn",
-		F { return new FunctionCategoryIn(context.getDictionaries().getCategoriesHierarchy()); });
-	factory.registerFunction("regionHierarchy",
-		F { return new FunctionRegionHierarchy(context.getDictionaries().getRegionsHierarchies()); });
-	factory.registerFunction("OSHierarchy",
-		F { return new FunctionOSHierarchy(context.getDictionaries().getTechDataHierarchy()); });
-	factory.registerFunction("SEHierarchy",
-		F { return new FunctionSEHierarchy(context.getDictionaries().getTechDataHierarchy()); });
-	factory.registerFunction("categoryHierarchy",
-		F { return new FunctionCategoryHierarchy(context.getDictionaries().getCategoriesHierarchy()); });
-	factory.registerFunction("regionToName",
-		F { return new FunctionRegionToName(context.getDictionaries().getRegionsNames()); });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsFormatting.cpp

@@ -6,11 +6,7 @@ namespace DB
 
 void registerFunctionsFormatting(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionBitmaskToList>();
-
-	factory.registerFunction("bitmaskToList", 	F { return new FunctionBitmaskToList; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsHashing.cpp

@@ -7,20 +7,16 @@ namespace DB
 
 void registerFunctionsHashing(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction *
+	factory.registerFunction<FunctionHalfMD5>();
-
+	factory.registerFunction<FunctionMD5>();
-	factory.registerFunction("halfMD5", 	F { return new FunctionHalfMD5; });
+	factory.registerFunction<FunctionSHA1>();
-	factory.registerFunction("MD5",			F { return new FunctionMD5; });
+	factory.registerFunction<FunctionSHA224>();
-	factory.registerFunction("SHA1",		F { return new FunctionSHA1; });
+	factory.registerFunction<FunctionSHA256>();
-	factory.registerFunction("SHA224",		F { return new FunctionSHA224; });
+	factory.registerFunction<FunctionSipHash64>();
-	factory.registerFunction("SHA256",		F { return new FunctionSHA256; });
+	factory.registerFunction<FunctionSipHash128>();
-	factory.registerFunction("sipHash64", 	F { return new FunctionSipHash64; });
+	factory.registerFunction<FunctionCityHash64>();
-	factory.registerFunction("sipHash128",	F { return new FunctionSipHash128; });
+	factory.registerFunction<FunctionIntHash32>();
-	factory.registerFunction("cityHash64", 	F { return new FunctionCityHash64; });
+	factory.registerFunction<FunctionIntHash64>();
-	factory.registerFunction("intHash32", 	F { return new FunctionIntHash32; });
-	factory.registerFunction("intHash64", 	F { return new FunctionIntHash64; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsHigherOrder.cpp

@@ -6,18 +6,14 @@ namespace DB
 
 void registerFunctionsHigherOrder(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction *
+	factory.registerFunction<FunctionArrayMap>();
-
+	factory.registerFunction<FunctionArrayFilter>();
-	factory.registerFunction("arrayMap", 		F { return new FunctionArrayMap; });
+	factory.registerFunction<FunctionArrayCount>();
-	factory.registerFunction("arrayFilter", 	F { return new FunctionArrayFilter; });
+	factory.registerFunction<FunctionArrayExists>();
-	factory.registerFunction("arrayCount", 		F { return new FunctionArrayCount; });
+	factory.registerFunction<FunctionArrayAll>();
-	factory.registerFunction("arrayExists", 	F { return new FunctionArrayExists; });
+	factory.registerFunction<FunctionArraySum>();
-	factory.registerFunction("arrayAll", 		F { return new FunctionArrayAll; });
+	factory.registerFunction<FunctionArrayFirst>();
-	factory.registerFunction("arraySum", 		F { return new FunctionArraySum; });
+	factory.registerFunction<FunctionArrayFirstIndex>();
-	factory.registerFunction("arrayFirst", 		F { return new FunctionArrayFirst; });
-	factory.registerFunction("arrayFirstIndex", 		F { return new FunctionArrayFirstIndex; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsLogical.cpp

@@ -6,14 +6,10 @@ namespace DB
 
 void registerFunctionsLogical(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionAnd>();
-
+	factory.registerFunction<FunctionOr>();
-	factory.registerFunction("and", F { return new FunctionAnd; });
+	factory.registerFunction<FunctionXor>();
-	factory.registerFunction("or", 	F { return new FunctionOr; });
+	factory.registerFunction<FunctionNot>();
-	factory.registerFunction("xor", F { return new FunctionXor; });
-	factory.registerFunction("not", F { return new FunctionNot; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsMiscellaneous.cpp

@@ -305,27 +305,23 @@ namespace DB
 
 void registerFunctionsMiscellaneous(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionCurrentDatabase>();
+	factory.registerFunction<FunctionHostName>();
+	factory.registerFunction<FunctionVisibleWidth>();
+	factory.registerFunction<FunctionToTypeName>();
+	factory.registerFunction<FunctionBlockSize>();
+	factory.registerFunction<FunctionSleep>();
+	factory.registerFunction<FunctionMaterialize>();
+	factory.registerFunction<FunctionIgnore>();
+	factory.registerFunction<FunctionArrayJoin>();
+	factory.registerFunction<FunctionBar>();
 
-	factory.registerFunction("currentDatabase", F { return new FunctionCurrentDatabase{context.getCurrentDatabase()}; });
+	factory.registerFunction<FunctionTuple>();
-	factory.registerFunction("hostName", 		F { return new FunctionHostName; });
+	factory.registerFunction<FunctionTupleElement>();
-	factory.registerFunction("visibleWidth", 	F { return new FunctionVisibleWidth; });
+	factory.registerFunction<FunctionIn<false, false>>();
-	factory.registerFunction("toTypeName", 		F { return new FunctionToTypeName; });
+	factory.registerFunction<FunctionIn<false, true>>();
-	factory.registerFunction("blockSize", 		F { return new FunctionBlockSize; });
+	factory.registerFunction<FunctionIn<true, false>>();
-	factory.registerFunction("sleep", 			F { return new FunctionSleep; });
+	factory.registerFunction<FunctionIn<true, true>>();
-	factory.registerFunction("materialize", 	F { return new FunctionMaterialize; });
-	factory.registerFunction("ignore", 			F { return new FunctionIgnore; });
-	factory.registerFunction("arrayJoin", 		F { return new FunctionArrayJoin; });
-	factory.registerFunction("bar", 			F { return new FunctionBar; });
-
-	factory.registerFunction("tuple", 			F { return new FunctionTuple; });
-	factory.registerFunction("tupleElement", 	F { return new FunctionTupleElement; });
-	factory.registerFunction("in", 				F { return new FunctionIn(false, false); });
-	factory.registerFunction("notIn", 			F { return new FunctionIn(true, false); });
-	factory.registerFunction("globalIn", 		F { return new FunctionIn(false, true); });
-	factory.registerFunction("globalNotIn", 	F { return new FunctionIn(true, true); });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsRandom.cpp

@@ -6,12 +6,8 @@ namespace DB
 
 void registerFunctionsRandom(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionRand>();
-
+	factory.registerFunction<FunctionRand64>();
-	factory.registerFunction("rand", 	F { return new FunctionRand; });
-	factory.registerFunction("rand64", 	F { return new FunctionRand64; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsReinterpret.cpp

@@ -6,23 +6,19 @@ namespace DB
 
 void registerFunctionsReinterpret(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionReinterpretAsUInt8>();
-
+	factory.registerFunction<FunctionReinterpretAsUInt16>();
-	factory.registerFunction("reinterpretAsUInt8",		F { return new FunctionReinterpretAsUInt8; });
+	factory.registerFunction<FunctionReinterpretAsUInt32>();
-	factory.registerFunction("reinterpretAsUInt16", 	F { return new FunctionReinterpretAsUInt16; });
+	factory.registerFunction<FunctionReinterpretAsUInt64>();
-	factory.registerFunction("reinterpretAsUInt32", 	F { return new FunctionReinterpretAsUInt32; });
+	factory.registerFunction<FunctionReinterpretAsInt8>();
-	factory.registerFunction("reinterpretAsUInt64", 	F { return new FunctionReinterpretAsUInt64; });
+	factory.registerFunction<FunctionReinterpretAsInt16>();
-	factory.registerFunction("reinterpretAsInt8", 		F { return new FunctionReinterpretAsInt8; });
+	factory.registerFunction<FunctionReinterpretAsInt32>();
-	factory.registerFunction("reinterpretAsInt16", 		F { return new FunctionReinterpretAsInt16; });
+	factory.registerFunction<FunctionReinterpretAsInt64>();
-	factory.registerFunction("reinterpretAsInt32", 		F { return new FunctionReinterpretAsInt32; });
+	factory.registerFunction<FunctionReinterpretAsFloat32>();
-	factory.registerFunction("reinterpretAsInt64", 		F { return new FunctionReinterpretAsInt64; });
+	factory.registerFunction<FunctionReinterpretAsFloat64>();
-	factory.registerFunction("reinterpretAsFloat32", 	F { return new FunctionReinterpretAsFloat32; });
+	factory.registerFunction<FunctionReinterpretAsDate>();
-	factory.registerFunction("reinterpretAsFloat64", 	F { return new FunctionReinterpretAsFloat64; });
+	factory.registerFunction<FunctionReinterpretAsDateTime>();
-	factory.registerFunction("reinterpretAsDate", 		F { return new FunctionReinterpretAsDate; });
+	factory.registerFunction<FunctionReinterpretAsString>();
-	factory.registerFunction("reinterpretAsDateTime", 	F { return new FunctionReinterpretAsDateTime; });
-	factory.registerFunction("reinterpretAsString", 	F { return new FunctionReinterpretAsString; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsRound.cpp

@@ -6,13 +6,9 @@ namespace DB
 
 void registerFunctionsRound(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionRoundToExp2>();
-
+	factory.registerFunction<FunctionRoundDuration>();
-	factory.registerFunction("roundToExp2", 	F { return new FunctionRoundToExp2; });
+	factory.registerFunction<FunctionRoundAge>();
-	factory.registerFunction("roundDuration", 	F { return new FunctionRoundDuration; });
-	factory.registerFunction("roundAge", 		F { return new FunctionRoundAge; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsString.cpp

@@ -6,23 +6,19 @@ namespace DB
 
 void registerFunctionsString(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionEmpty>();
-
+	factory.registerFunction<FunctionNotEmpty>();
-	factory.registerFunction("empty", 			F { return new FunctionEmpty; });
+	factory.registerFunction<FunctionLength>();
-	factory.registerFunction("notEmpty", 		F { return new FunctionNotEmpty; });
+	factory.registerFunction<FunctionLengthUTF8>();
-	factory.registerFunction("length", 			F { return new FunctionLength; });
+	factory.registerFunction<FunctionLower>();
-	factory.registerFunction("lengthUTF8", 		F { return new FunctionLengthUTF8; });
+	factory.registerFunction<FunctionUpper>();
-	factory.registerFunction("lower", 			F { return new FunctionLower; });
+	factory.registerFunction<FunctionLowerUTF8>();
-	factory.registerFunction("upper", 			F { return new FunctionUpper; });
+	factory.registerFunction<FunctionUpperUTF8>();
-	factory.registerFunction("lowerUTF8", 		F { return new FunctionLowerUTF8; });
+	factory.registerFunction<FunctionReverse>();
-	factory.registerFunction("upperUTF8", 		F { return new FunctionUpperUTF8; });
+	factory.registerFunction<FunctionReverseUTF8>();
-	factory.registerFunction("reverse", 		F { return new FunctionReverse; });
+	factory.registerFunction<FunctionConcat>();
-	factory.registerFunction("reverseUTF8", 	F { return new FunctionReverseUTF8; });
+	factory.registerFunction<FunctionSubstring>();
-	factory.registerFunction("concat", 			F { return new FunctionConcat; });
+	factory.registerFunction<FunctionSubstringUTF8>();
-	factory.registerFunction("substring", 		F { return new FunctionSubstring; });
-	factory.registerFunction("substringUTF8", 	F { return new FunctionSubstringUTF8; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsStringArray.cpp

@@ -6,14 +6,10 @@ namespace DB
 
 void registerFunctionsStringArray(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionExtractAll>();
-
+	factory.registerFunction<FunctionAlphaTokens>();
-	factory.registerFunction("extractAll", 		F { return new FunctionExtractAll; });
+	factory.registerFunction<FunctionSplitByChar>();
-	factory.registerFunction("alphaTokens", 	F { return new FunctionAlphaTokens; });
+	factory.registerFunction<FunctionSplitByString>();
-	factory.registerFunction("splitByChar", 	F { return new FunctionSplitByChar; });
-	factory.registerFunction("splitByString", 	F { return new FunctionSplitByString; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsStringSearch.cpp

@@ -6,20 +6,16 @@ namespace DB
 
 void registerFunctionsStringSearch(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionReplaceOne>();
-
+	factory.registerFunction<FunctionReplaceAll>();
-	factory.registerFunction("replaceOne", 			F { return new FunctionReplaceOne; });
+	factory.registerFunction<FunctionReplaceRegexpOne>();
-	factory.registerFunction("replaceAll", 			F { return new FunctionReplaceAll; });
+	factory.registerFunction<FunctionReplaceRegexpAll>();
-	factory.registerFunction("replaceRegexpOne", 	F { return new FunctionReplaceRegexpOne; });
+	factory.registerFunction<FunctionPosition>();
-	factory.registerFunction("replaceRegexpAll", 	F { return new FunctionReplaceRegexpAll; });
+	factory.registerFunction<FunctionPositionUTF8>();
-	factory.registerFunction("position", 			F { return new FunctionPosition; });
+	factory.registerFunction<FunctionMatch>();
-	factory.registerFunction("positionUTF8", 		F { return new FunctionPositionUTF8; });
+	factory.registerFunction<FunctionLike>();
-	factory.registerFunction("match", 				F { return new FunctionMatch; });
+	factory.registerFunction<FunctionNotLike>();
-	factory.registerFunction("like", 				F { return new FunctionLike; });
+	factory.registerFunction<FunctionExtract>();
-	factory.registerFunction("notLike", 			F { return new FunctionNotLike; });
-	factory.registerFunction("extract", 			F { return new FunctionExtract; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsURL.cpp

@@ -6,30 +6,26 @@ namespace DB
 
 void registerFunctionsURL(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionProtocol>();
-
+	factory.registerFunction<FunctionDomain>();
-	factory.registerFunction("protocol", 					F { return new FunctionProtocol; });
+	factory.registerFunction<FunctionDomainWithoutWWW>();
-	factory.registerFunction("domain", 						F { return new FunctionDomain; });
+	factory.registerFunction<FunctionFirstSignificantSubdomain>();
-	factory.registerFunction("domainWithoutWWW", 			F { return new FunctionDomainWithoutWWW; });
+	factory.registerFunction<FunctionTopLevelDomain>();
-	factory.registerFunction("firstSignificantSubdomain",	F { return new FunctionFirstSignificantSubdomain; });
+	factory.registerFunction<FunctionPath>();
-	factory.registerFunction("topLevelDomain", 				F { return new FunctionTopLevelDomain; });
+	factory.registerFunction<FunctionQueryString>();
-	factory.registerFunction("path", 						F { return new FunctionPath; });
+	factory.registerFunction<FunctionFragment>();
-	factory.registerFunction("queryString", 				F { return new FunctionQueryString; });
+	factory.registerFunction<FunctionQueryStringAndFragment>();
-	factory.registerFunction("fragment", 					F { return new FunctionFragment; });
+	factory.registerFunction<FunctionExtractURLParameter>();
-	factory.registerFunction("queryStringAndFragment", 		F { return new FunctionQueryStringAndFragment; });
+	factory.registerFunction<FunctionExtractURLParameters>();
-	factory.registerFunction("extractURLParameter", 		F { return new FunctionExtractURLParameter; });
+	factory.registerFunction<FunctionExtractURLParameterNames>();
-	factory.registerFunction("extractURLParameters", 		F { return new FunctionExtractURLParameters; });
+	factory.registerFunction<FunctionURLHierarchy>();
-	factory.registerFunction("extractURLParameterNames", 	F { return new FunctionExtractURLParameterNames; });
+	factory.registerFunction<FunctionURLPathHierarchy>();
-	factory.registerFunction("URLHierarchy", 				F { return new FunctionURLHierarchy; });
+	factory.registerFunction<FunctionCutToFirstSignificantSubdomain>();
-	factory.registerFunction("URLPathHierarchy", 			F { return new FunctionURLPathHierarchy; });
+	factory.registerFunction<FunctionCutWWW>();
-	factory.registerFunction("cutToFirstSignificantSubdomain", F { return new FunctionCutToFirstSignificantSubdomain; });
+	factory.registerFunction<FunctionCutQueryString>();
-	factory.registerFunction("cutWWW", 						F { return new FunctionCutWWW; });
+	factory.registerFunction<FunctionCutFragment>();
-	factory.registerFunction("cutQueryString", 				F { return new FunctionCutQueryString; });
+	factory.registerFunction<FunctionCutQueryStringAndFragment>();
-	factory.registerFunction("cutFragment", 				F { return new FunctionCutFragment; });
+	factory.registerFunction<FunctionCutURLParameter>();
-	factory.registerFunction("cutQueryStringAndFragment", 	F { return new FunctionCutQueryStringAndFragment; });
-	factory.registerFunction("cutURLParameter", 			F { return new FunctionCutURLParameter; });
-
-	#undef F
 }
 
 }

dbms/src/Functions/FunctionsVisitParam.cpp

@@ -6,17 +6,13 @@ namespace DB
 
 void registerFunctionsVisitParam(FunctionFactory & factory)
 {
-	#define F [](const Context & context) -> IFunction*
+	factory.registerFunction<FunctionVisitParamHas>();
-
+	factory.registerFunction<FunctionVisitParamExtractUInt>();
-	factory.registerFunction("visitParamHas", 				F { return new FunctionVisitParamHas; });
+	factory.registerFunction<FunctionVisitParamExtractInt>();
-	factory.registerFunction("visitParamExtractUInt", 		F { return new FunctionVisitParamExtractUInt; });
+	factory.registerFunction<FunctionVisitParamExtractFloat>();
-	factory.registerFunction("visitParamExtractInt", 		F { return new FunctionVisitParamExtractInt; });
+	factory.registerFunction<FunctionVisitParamExtractBool>();
-	factory.registerFunction("visitParamExtractFloat", 		F { return new FunctionVisitParamExtractFloat; });
+	factory.registerFunction<FunctionVisitParamExtractRaw>();
-	factory.registerFunction("visitParamExtractBool", 		F { return new FunctionVisitParamExtractBool; });
+	factory.registerFunction<FunctionVisitParamExtractString>();
-	factory.registerFunction("visitParamExtractRaw", 		F { return new FunctionVisitParamExtractRaw; });
-	factory.registerFunction("visitParamExtractString", 	F { return new FunctionVisitParamExtractString; });
-
-	#undef F
 }
 
 }

dbms/src/Interpreters/ExpressionAnalyzer.cpp

@@ -63,8 +63,10 @@ void ExpressionAnalyzer::init()
 {
 	select_query = typeid_cast<ASTSelectQuery *>(&*ast);
 
+	addStorageAliases();
+
 	/// Создаёт словарь aliases: alias -> ASTPtr
-	createAliasesDict(ast);
+	addASTAliases(ast);
 
 	/// Common subexpression elimination. Rewrite rules.
 	normalizeTree();
@@ -235,9 +237,19 @@ NamesAndTypesList::iterator ExpressionAnalyzer::findColumn(const String & name,
 }
 
 
+void ExpressionAnalyzer::addStorageAliases()
+{
+	if (!storage)
+		return;
+
+	for (const auto & alias : storage->alias_columns)
+		aliases[alias.name] = storage->column_defaults[alias.name].expression;
+}
+
+
 /// ignore_levels - алиасы в скольки верхних уровнях поддерева нужно игнорировать.
 /// Например, при ignore_levels=1 ast не может быть занесен в словарь, но его дети могут.
-void ExpressionAnalyzer::createAliasesDict(ASTPtr & ast, int ignore_levels)
+void ExpressionAnalyzer::addASTAliases(ASTPtr & ast, int ignore_levels)
 {
 	ASTSelectQuery * select = typeid_cast<ASTSelectQuery *>(&*ast);
 
@@ -252,7 +264,7 @@ void ExpressionAnalyzer::createAliasesDict(ASTPtr & ast, int ignore_levels)
 			new_ignore_levels = 2;
 
 		if (!typeid_cast<ASTSelectQuery *>(&*child))
-			createAliasesDict(child, new_ignore_levels);
+			addASTAliases(child, new_ignore_levels);
 	}
 
 	if (ignore_levels > 0)
@@ -1689,18 +1701,34 @@ void ExpressionAnalyzer::collectUsedColumns()
 			++it;
 	}
 
-	/// Возможно, среди неизвестных столбцов есть виртуальные. Удаляем их из списка неизвестных и добавляем
+	for (NamesAndTypesList::iterator it = columns.begin(); it != columns.end();)
-	/// в columns list, чтобы при дальнейшей обработке запроса они воспринимались как настоящие.
-	for (NameSet::iterator it = unknown_required_columns.begin(); it != unknown_required_columns.end();)
 	{
-		if (storage && storage->hasColumn(*it))
+		unknown_required_columns.erase(it->name);
+
+		if (!required.count(it->name))
 		{
-			columns.push_back(storage->getColumn(*it));
+			required.erase(it->name);
-			unknown_required_columns.erase(it++);
+			columns.erase(it++);
 		}
 		else
 			++it;
 	}
+
+	/// Возможно, среди неизвестных столбцов есть виртуальные. Удаляем их из списка неизвестных и добавляем
+	/// в columns list, чтобы при дальнейшей обработке запроса они воспринимались как настоящие.
+	if (storage)
+	{
+		for (auto it = unknown_required_columns.begin(); it != unknown_required_columns.end();)
+		{
+			if (storage->hasColumn(*it))
+			{
+				columns.push_back(storage->getColumn(*it));
+				unknown_required_columns.erase(it++);
+			}
+			else
+				++it;
+		}
+	}
 }
 
 void ExpressionAnalyzer::collectJoinedColumns(NameSet & joined_columns, NamesAndTypesList & joined_columns_name_type)

dbms/src/Interpreters/InterpreterAlterQuery.cpp

@@ -28,15 +28,15 @@ InterpreterAlterQuery::InterpreterAlterQuery(ASTPtr query_ptr_, Context & contex
 
 void InterpreterAlterQuery::execute()
 {
-	ASTAlterQuery & alter = typeid_cast<ASTAlterQuery &>(*query_ptr);
+	auto & alter = typeid_cast<ASTAlterQuery &>(*query_ptr);
-	String & table_name = alter.table;
+	const String & table_name = alter.table;
 	String database_name = alter.database.empty() ? context.getCurrentDatabase() : alter.database;
+	StoragePtr table = context.getTable(database_name, table_name);
+
 	AlterCommands alter_commands;
 	PartitionCommands partition_commands;
 	parseAlter(alter.parameters, context.getDataTypeFactory(), alter_commands, partition_commands);
 
-	StoragePtr table = context.getTable(database_name, table_name);
-
 	for (const PartitionCommand & command : partition_commands)
 	{
 		switch (command.type)
@@ -62,8 +62,12 @@ void InterpreterAlterQuery::execute()
 		}
 	}
 
-	if (!alter_commands.empty())
+	if (alter_commands.empty())
-		table->alter(alter_commands, database_name, table_name, context);
+		return;
+
+	alter_commands.validate(table.get(), context);
+
+	table->alter(alter_commands, database_name, table_name, context);
 }
 
 void InterpreterAlterQuery::parseAlter(
@@ -77,12 +81,20 @@ void InterpreterAlterQuery::parseAlter(
 			AlterCommand command;
 			command.type = AlterCommand::ADD;
 
-			const ASTNameTypePair & ast_name_type = typeid_cast<const ASTNameTypePair &>(*params.name_type);
+			const auto & ast_col_decl = typeid_cast<const ASTColumnDeclaration &>(*params.col_decl);
-			StringRange type_range = ast_name_type.type->range;
-			String type_string = String(type_range.first, type_range.second - type_range.first);
 
-			command.column_name = ast_name_type.name;
+			command.column_name = ast_col_decl.name;
-			command.data_type = data_type_factory.get(type_string);
+			if (ast_col_decl.type)
+			{
+				StringRange type_range = ast_col_decl.type->range;
+				String type_string(type_range.first, type_range.second - type_range.first);
+				command.data_type = data_type_factory.get(type_string);
+			}
+			if (ast_col_decl.default_expression)
+			{
+				command.default_type = columnDefaultTypeFromString(ast_col_decl.default_specifier);
+				command.default_expression = ast_col_decl.default_expression;
+			}
 
 			if (params.column)
 				command.after_column = typeid_cast<const ASTIdentifier &>(*params.column).name;
@@ -102,12 +114,21 @@ void InterpreterAlterQuery::parseAlter(
 			AlterCommand command;
 			command.type = AlterCommand::MODIFY;
 
-			const ASTNameTypePair & ast_name_type = typeid_cast<const ASTNameTypePair &>(*params.name_type);
+			const auto & ast_col_decl = typeid_cast<const ASTColumnDeclaration &>(*params.col_decl);
-			StringRange type_range = ast_name_type.type->range;
-			String type_string = String(type_range.first, type_range.second - type_range.first);
 
-			command.column_name = ast_name_type.name;
+			command.column_name = ast_col_decl.name;
-			command.data_type = data_type_factory.get(type_string);
+			if (ast_col_decl.type)
+			{
+				StringRange type_range = ast_col_decl.type->range;
+				String type_string(type_range.first, type_range.second - type_range.first);
+				command.data_type = data_type_factory.get(type_string);
+			}
+
+			if (ast_col_decl.default_expression)
+			{
+				command.default_type = columnDefaultTypeFromString(ast_col_decl.default_specifier);
+				command.default_expression = ast_col_decl.default_expression;
+			}
 
 			out_alter_commands.push_back(command);
 		}
@@ -137,7 +158,13 @@ void InterpreterAlterQuery::parseAlter(
 }
 
 void InterpreterAlterQuery::updateMetadata(
-	const String & database_name, const String & table_name, const NamesAndTypesList & columns, Context & context)
+	const String & database_name,
+	const String & table_name,
+	const NamesAndTypesList & columns,
+	const NamesAndTypesList & materialized_columns,
+	const NamesAndTypesList & alias_columns,
+	const ColumnDefaults & column_defaults,
+	Context & context)
 {
 	String path = context.getPath();
 
@@ -172,7 +199,7 @@ void InterpreterAlterQuery::updateMetadata(
 
 	ASTCreateQuery & attach = typeid_cast<ASTCreateQuery &>(*ast);
 
-	ASTPtr new_columns = InterpreterCreateQuery::formatColumns(columns);
+	ASTPtr new_columns = InterpreterCreateQuery::formatColumns(columns, materialized_columns, alias_columns, column_defaults);
 	*std::find(attach.children.begin(), attach.children.end(), attach.columns) = new_columns;
 	attach.columns = new_columns;
 

dbms/src/Interpreters/InterpreterCreateQuery.cpp

@@ -11,6 +11,7 @@
 
 #include <DB/Parsers/ASTCreateQuery.h>
 #include <DB/Parsers/ASTNameTypePair.h>
+#include <DB/Parsers/ASTColumnDeclaration.h>
 
 #include <DB/Storages/StorageLog.h>
 #include <DB/Storages/StorageSystemNumbers.h>
@@ -20,6 +21,8 @@
 
 #include <DB/Interpreters/InterpreterSelectQuery.h>
 #include <DB/Interpreters/InterpreterCreateQuery.h>
+#include <DB/Interpreters/ExpressionAnalyzer.h>
+#include <DB/DataTypes/DataTypesNumberFixed.h>
 #include <DB/DataTypes/DataTypeNested.h>
 
 
@@ -87,6 +90,9 @@ StoragePtr InterpreterCreateQuery::execute(bool assume_metadata_exists)
 	StoragePtr res;
 	String storage_name;
 	NamesAndTypesListPtr columns = new NamesAndTypesList;
+	NamesAndTypesList materialized_columns{};
+	NamesAndTypesList alias_columns{};
+	ColumnDefaults column_defaults{};
 
 	StoragePtr as_storage;
 	IStorage::TableStructureReadLockPtr as_storage_lock;
@@ -115,10 +121,22 @@ StoragePtr InterpreterCreateQuery::execute(bool assume_metadata_exists)
 		/// Получаем список столбцов
 		if (create.columns)
 		{
-			columns = new NamesAndTypesList(parseColumns(create.columns, context.getDataTypeFactory()));
+			auto && columns_and_defaults = parseColumns(create.columns);
+			materialized_columns = removeAndReturnColumns(columns_and_defaults, ColumnDefaultType::Materialized);
+			alias_columns = removeAndReturnColumns(columns_and_defaults, ColumnDefaultType::Alias);
+			columns = new NamesAndTypesList{std::move(columns_and_defaults.first)};
+			column_defaults = std::move(columns_and_defaults.second);
+
+			if (columns->size() + materialized_columns.size() == 0)
+				throw Exception{"Cannot CREATE table without physical columns", ErrorCodes::EMPTY_LIST_OF_COLUMNS_PASSED};
 		}
 		else if (!create.as_table.empty())
-			columns = new NamesAndTypesList(as_storage->getColumnsList());
+		{
+			columns = new NamesAndTypesList(as_storage->getColumnsListNonMaterialized());
+			materialized_columns = as_storage->materialized_columns;
+			alias_columns = as_storage->alias_columns;
+			column_defaults = as_storage->column_defaults;
+		}
 		else if (create.select)
 		{
 			columns = new NamesAndTypesList;
@@ -129,7 +147,7 @@ StoragePtr InterpreterCreateQuery::execute(bool assume_metadata_exists)
 			throw Exception("Incorrect CREATE query: required list of column descriptions or AS section or SELECT.", ErrorCodes::INCORRECT_QUERY);
 
 		/// Даже если в запросе был список столбцов, на всякий случай приведем его к стандартному виду (развернем Nested).
-		ASTPtr new_columns = formatColumns(*columns);
+		ASTPtr new_columns = formatColumns(*columns, materialized_columns, alias_columns, column_defaults);
 		if (create.columns)
 		{
 			auto it = std::find(create.children.begin(), create.children.end(), create.columns);
@@ -178,7 +196,8 @@ StoragePtr InterpreterCreateQuery::execute(bool assume_metadata_exists)
 
 		res = context.getStorageFactory().get(
 			storage_name, data_path, table_name, database_name, context,
-			context.getGlobalContext(), query_ptr, columns, create.attach);
+			context.getGlobalContext(), query_ptr, columns,
+			materialized_columns, alias_columns, column_defaults, create.attach);
 
 		/// Проверка наличия метаданных таблицы на диске и создание метаданных
 		if (!assume_metadata_exists && !create.is_temporary)
@@ -233,47 +252,195 @@ StoragePtr InterpreterCreateQuery::execute(bool assume_metadata_exists)
 	return res;
 }
 
-NamesAndTypesList InterpreterCreateQuery::parseColumns(ASTPtr expression_list, const DataTypeFactory & data_type_factory)
+InterpreterCreateQuery::ColumnsAndDefaults InterpreterCreateQuery::parseColumns(ASTPtr expression_list)
 {
-	NamesAndTypesList columns;
+	auto & column_list_ast = typeid_cast<ASTExpressionList &>(*expression_list);
-	ASTExpressionList & columns_list = typeid_cast<ASTExpressionList &>(*expression_list);
+
-	for (const ASTPtr & ast : columns_list.children)
+	/// list of table columns in correct order
+	NamesAndTypesList columns{};
+	ColumnDefaults defaults{};
+
+	/// Columns requiring type-deduction or default_expression type-check
+	std::vector<std::pair<NameAndTypePair *, ASTColumnDeclaration *>> defaulted_columns{};
+
+	/** all default_expressions as a single expression list,
+	 *  mixed with conversion-columns for each explicitly specified type */
+	ASTPtr default_expr_list{new ASTExpressionList};
+	default_expr_list->children.reserve(column_list_ast.children.size());
+
+	for (auto & ast : column_list_ast.children)
 	{
-		const ASTNameTypePair & name_and_type_pair = typeid_cast<const ASTNameTypePair &>(*ast);
+		auto & col_decl = typeid_cast<ASTColumnDeclaration &>(*ast);
-		StringRange type_range = name_and_type_pair.type->range;
+
-		columns.push_back(NameAndTypePair(
+		if (col_decl.type)
-			name_and_type_pair.name,
+		{
-			data_type_factory.get(String(type_range.first, type_range.second - type_range.first))));
+			const auto & type_range = col_decl.type->range;
+			columns.emplace_back(col_decl.name,
+				context.getDataTypeFactory().get({ type_range.first, type_range.second }));
+		}
+		else
+			/// we're creating dummy DataTypeUInt8 in order to prevent the NullPointerException in ExpressionActions
+			columns.emplace_back(col_decl.name, new DataTypeUInt8);
+
+		/// add column to postprocessing if there is a default_expression specified
+		if (col_decl.default_expression)
+		{
+			defaulted_columns.emplace_back(&columns.back(), &col_decl);
+
+			/** for columns with explicitly-specified type create two expressions:
+			 *	1. default_expression aliased as column name with _tmp suffix
+			 *	2. conversion of expression (1) to explicitly-specified type alias as column name */
+			if (col_decl.type)
+			{
+				const auto tmp_column_name = col_decl.name + "_tmp";
+				const auto & final_column_name = col_decl.name;
+				const auto conversion_function_name = "to" + columns.back().type->getName();
+
+				default_expr_list->children.emplace_back(setAlias(
+					makeASTFunction(conversion_function_name, ASTPtr{new ASTIdentifier{{}, tmp_column_name}}),
+					final_column_name));
+
+				default_expr_list->children.emplace_back(setAlias(col_decl.default_expression->clone(), tmp_column_name));
+			}
+			else
+			{
+				default_expr_list->children.emplace_back(setAlias(col_decl.default_expression->clone(), col_decl.name));
+			}
+		}
 	}
-	columns = *DataTypeNested::expandNestedColumns(columns);
+
-	return columns;
+	/// set missing types and wrap default_expression's in a conversion-function if necessary
+	if (!defaulted_columns.empty())
+	{
+		const auto actions = ExpressionAnalyzer{default_expr_list, context, columns}.getActions(true);
+		const auto block = actions->getSampleBlock();
+
+		for (auto & column : defaulted_columns)
+		{
+			const auto name_and_type_ptr = column.first;
+			const auto col_decl_ptr = column.second;
+
+			if (col_decl_ptr->type)
+			{
+				const auto & tmp_column = block.getByName(col_decl_ptr->name + "_tmp");
+
+				/// type mismatch between explicitly specified and deduced type, add conversion
+				if (typeid(*name_and_type_ptr->type) != typeid(*tmp_column.type))
+				{
+					col_decl_ptr->default_expression = makeASTFunction(
+						"to" + name_and_type_ptr->type->getName(),
+						col_decl_ptr->default_expression);
+
+					col_decl_ptr->children.clear();
+					col_decl_ptr->children.push_back(col_decl_ptr->type);
+					col_decl_ptr->children.push_back(col_decl_ptr->default_expression);
+				}
+			}
+			else
+				name_and_type_ptr->type = block.getByName(name_and_type_ptr->name).type;
+
+			defaults.emplace(col_decl_ptr->name, ColumnDefault{
+				columnDefaultTypeFromString(col_decl_ptr->default_specifier),
+				col_decl_ptr->default_expression
+			});
+		}
+	}
+
+	return { *DataTypeNested::expandNestedColumns(columns), defaults };
+}
+
+NamesAndTypesList InterpreterCreateQuery::removeAndReturnColumns(ColumnsAndDefaults & columns_and_defaults,
+	const ColumnDefaultType type)
+{
+	auto & columns = columns_and_defaults.first;
+	auto & defaults = columns_and_defaults.second;
+
+	NamesAndTypesList removed{};
+
+	for (auto it = std::begin(columns); it != std::end(columns);)
+	{
+		const auto jt = defaults.find(it->name);
+		if (jt != std::end(defaults) && jt->second.type == type)
+		{
+			removed.push_back(*it);
+			it = columns.erase(it);
+		}
+		else
+			++it;
+	}
+
+	return removed;
 }
 
 ASTPtr InterpreterCreateQuery::formatColumns(const NamesAndTypesList & columns)
 {
-	ASTPtr columns_list_ptr = new ASTExpressionList;
+	ASTPtr columns_list_ptr{new ASTExpressionList};
 	ASTExpressionList & columns_list = typeid_cast<ASTExpressionList &>(*columns_list_ptr);
 
-	for (const NameAndTypePair & it : columns)
+	for (const auto & column : columns)
 	{
-		ASTPtr name_and_type_pair_ptr = new ASTNameTypePair;
+		const auto column_declaration = new ASTColumnDeclaration;
-		ASTNameTypePair & name_and_type_pair = typeid_cast<ASTNameTypePair &>(*name_and_type_pair_ptr);
+		ASTPtr column_declaration_ptr{column_declaration};
-		name_and_type_pair.name = it.name;
+
-		StringPtr type_name = new String(it.type->getName());
+		column_declaration->name = column.name;
+
+		StringPtr type_name{new String(column.type->getName())};
+		auto pos = type_name->data();
+		const auto end = pos + type_name->size();
 
 		ParserIdentifierWithOptionalParameters storage_p;
-		Expected expected = "";
+		Expected expected{""};
-		const char * pos = type_name->data();
+		if (!storage_p.parse(pos, end, column_declaration->type, expected))
-		const char * end = pos + type_name->size();
-
-		if (!storage_p.parse(pos, end, name_and_type_pair.type, expected))
 			throw Exception("Cannot parse data type.", ErrorCodes::SYNTAX_ERROR);
 
-		name_and_type_pair.type->query_string = type_name;
+		column_declaration->type->query_string = type_name;
-		columns_list.children.push_back(name_and_type_pair_ptr);
+		columns_list.children.push_back(column_declaration_ptr);
 	}
 
 	return columns_list_ptr;
 }
 
+ASTPtr InterpreterCreateQuery::formatColumns(NamesAndTypesList columns,
+	const NamesAndTypesList & materialized_columns,
+	const NamesAndTypesList & alias_columns,
+	const ColumnDefaults & column_defaults)
+{
+	columns.insert(std::end(columns), std::begin(materialized_columns), std::end(materialized_columns));
+	columns.insert(std::end(columns), std::begin(alias_columns), std::end(alias_columns));
+
+	ASTPtr columns_list_ptr{new ASTExpressionList};
+	ASTExpressionList & columns_list = typeid_cast<ASTExpressionList &>(*columns_list_ptr);
+
+	for (const auto & column : columns)
+	{
+		const auto column_declaration = new ASTColumnDeclaration;
+		ASTPtr column_declaration_ptr{column_declaration};
+
+		column_declaration->name = column.name;
+
+		StringPtr type_name{new String(column.type->getName())};
+		auto pos = type_name->data();
+		const auto end = pos + type_name->size();
+
+		ParserIdentifierWithOptionalParameters storage_p;
+		Expected expected{""};
+		if (!storage_p.parse(pos, end, column_declaration->type, expected))
+			throw Exception("Cannot parse data type.", ErrorCodes::SYNTAX_ERROR);
+
+		column_declaration->type->query_string = type_name;
+
+		const auto it = column_defaults.find(column.name);
+		if (it != std::end(column_defaults))
+		{
+			column_declaration->default_specifier = toString(it->second.type);
+			column_declaration->default_expression = it->second.expression->clone();
+		}
+
+		columns_list.children.push_back(column_declaration_ptr);
+	}
+
+	return columns_list_ptr;
+}
+
+
 }