ClickHouse/dbms/DataTypes/DataTypeAggregateFunction.h
Ivan 97f2a2213e
Move all folders inside /dbms one level up (#9974)
* Move some code outside dbms/src folder
* Fix paths
2020-04-02 02:51:21 +03:00

79 lines
3.9 KiB
C++

#pragma once
#include <AggregateFunctions/IAggregateFunction.h>
#include <DataTypes/IDataType.h>
namespace DB
{
/** Type - the state of the aggregate function.
* Type parameters is an aggregate function, the types of its arguments, and its parameters (for parametric aggregate functions).
*/
class DataTypeAggregateFunction final : public IDataType
{
private:
AggregateFunctionPtr function;
DataTypes argument_types;
Array parameters;
public:
static constexpr bool is_parametric = true;
DataTypeAggregateFunction(const AggregateFunctionPtr & function_, const DataTypes & argument_types_, const Array & parameters_)
: function(function_), argument_types(argument_types_), parameters(parameters_)
{
}
std::string getFunctionName() const { return function->getName(); }
AggregateFunctionPtr getFunction() const { return function; }
std::string doGetName() const override;
const char * getFamilyName() const override { return "AggregateFunction"; }
TypeIndex getTypeId() const override { return TypeIndex::AggregateFunction; }
bool canBeInsideNullable() const override { return false; }
DataTypePtr getReturnType() const { return function->getReturnType(); }
DataTypePtr getReturnTypeToPredict() const { return function->getReturnTypeToPredict(); }
DataTypes getArgumentsDataTypes() const { return argument_types; }
/// NOTE These two functions for serializing single values are incompatible with the functions below.
void serializeBinary(const Field & field, WriteBuffer & ostr) const override;
void deserializeBinary(Field & field, ReadBuffer & istr) const override;
void serializeBinary(const IColumn & column, size_t row_num, WriteBuffer & ostr) const override;
void deserializeBinary(IColumn & column, ReadBuffer & istr) const override;
void serializeBinaryBulk(const IColumn & column, WriteBuffer & ostr, size_t offset, size_t limit) const override;
void deserializeBinaryBulk(IColumn & column, ReadBuffer & istr, size_t limit, double avg_value_size_hint) const override;
void serializeText(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void serializeTextEscaped(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextEscaped(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
void serializeTextQuoted(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextQuoted(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
void deserializeWholeText(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
void serializeTextJSON(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextJSON(IColumn & column, ReadBuffer & istr, const FormatSettings &) const override;
void serializeTextXML(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void serializeTextCSV(const IColumn & column, size_t row_num, WriteBuffer & ostr, const FormatSettings &) const override;
void deserializeTextCSV(IColumn & column, ReadBuffer & istr, const FormatSettings & settings) const override;
void serializeProtobuf(const IColumn & column, size_t row_num, ProtobufWriter & protobuf, size_t & value_index) const override;
void deserializeProtobuf(IColumn & column, ProtobufReader & protobuf, bool allow_add_row, bool & row_added) const override;
MutableColumnPtr createColumn() const override;
Field getDefault() const override;
bool equals(const IDataType & rhs) const override;
bool isParametric() const override { return true; }
bool haveSubtypes() const override { return false; }
bool shouldAlignRightInPrettyFormats() const override { return false; }
};
}