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61 lines
2.5 KiB
C++
61 lines
2.5 KiB
C++
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#include <AggregateFunctions/AggregateFunctionQuantile.h>
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#include <AggregateFunctions/QuantileTiming.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 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 FuncQuantileTimingWeighted = AggregateFunctionQuantile<Value, QuantileTiming<Value>, NameQuantileTimingWeighted, true, Float32, false>;
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template <typename Value, bool _> using FuncQuantilesTimingWeighted = AggregateFunctionQuantile<Value, QuantileTiming<Value>, NameQuantilesTimingWeighted, true, Float32, true>;
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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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/// Second argument type check doesn't depend on the type of the first one.
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Function<void, true>::assertSecondArg(argument_types);
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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("Illegal type " + argument_type->getName() + " of argument for aggregate function " + name,
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT);
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}
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}
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void registerAggregateFunctionsQuantile(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(NameQuantileTimingWeighted::name, createAggregateFunctionQuantile<FuncQuantileTimingWeighted>);
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factory.registerFunction(NameQuantilesTimingWeighted::name, { createAggregateFunctionQuantile<FuncQuantilesTimingWeighted>, properties });
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/// 'median' is an alias for 'quantile'
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factory.registerAlias("medianTimingWeighted", NameQuantileTimingWeighted::name);
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}
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}
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