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59 lines
2.4 KiB
C++
59 lines
2.4 KiB
C++
#include <AggregateFunctions/AggregateFunctionQuantile.h>
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#include <AggregateFunctions/QuantileExact.h>
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#include <AggregateFunctions/AggregateFunctionFactory.h>
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#include <AggregateFunctions/Helpers.h>
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#include <DataTypes/DataTypeDate.h>
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#include <DataTypes/DataTypeDateTime.h>
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#include <Core/Field.h>
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namespace DB
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{
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struct Settings;
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namespace ErrorCodes
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{
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extern const int TOO_FEW_ARGUMENTS_FOR_FUNCTION;
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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}
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namespace
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{
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template <typename Value, bool _> using FuncQuantileExactInclusive = AggregateFunctionQuantile<Value, QuantileExactInclusive<Value>, NameQuantileExactInclusive, false, Float64, false, false>;
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template <typename Value, bool _> using FuncQuantilesExactInclusive = AggregateFunctionQuantile<Value, QuantileExactInclusive<Value>, NameQuantilesExactInclusive, false, Float64, true, false>;
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template <template <typename, bool> class Function>
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AggregateFunctionPtr createAggregateFunctionQuantile(
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const std::string & name, const DataTypes & argument_types, const Array & params, const Settings *)
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{
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if (argument_types.empty())
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throw Exception(ErrorCodes::TOO_FEW_ARGUMENTS_FOR_FUNCTION, "Aggregate function {} requires at least one argument", name);
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const DataTypePtr & argument_type = argument_types[0];
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WhichDataType which(argument_type);
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#define DISPATCH(TYPE) \
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if (which.idx == TypeIndex::TYPE) return std::make_shared<Function<TYPE, true>>(argument_types, params);
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FOR_BASIC_NUMERIC_TYPES(DISPATCH)
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#undef DISPATCH
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if (which.idx == TypeIndex::Date) return std::make_shared<Function<DataTypeDate::FieldType, false>>(argument_types, params);
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if (which.idx == TypeIndex::DateTime) return std::make_shared<Function<DataTypeDateTime::FieldType, false>>(argument_types, params);
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Illegal type {} of argument for aggregate function {}",
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argument_type->getName(), name);
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}
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}
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void registerAggregateFunctionsQuantileExactInclusive(AggregateFunctionFactory & factory)
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{
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/// For aggregate functions returning array we cannot return NULL on empty set.
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AggregateFunctionProperties properties = { .returns_default_when_only_null = true };
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factory.registerFunction(NameQuantileExactInclusive::name, createAggregateFunctionQuantile<FuncQuantileExactInclusive>);
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factory.registerFunction(NameQuantilesExactInclusive::name, { createAggregateFunctionQuantile<FuncQuantilesExactInclusive>, properties });
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}
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}
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