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