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46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#include <AggregateFunctions/AggregateFunctionFactory.h>
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#include <AggregateFunctions/AggregateFunctionEntropy.h>
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#include <AggregateFunctions/FactoryHelpers.h>
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#include <AggregateFunctions/Helpers.h>
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#include "registerAggregateFunctions.h"
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NUMBER_OF_ARGUMENTS_DOESNT_MATCH;
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}
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namespace
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{
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AggregateFunctionPtr createAggregateFunctionEntropy(const std::string & name, const DataTypes & argument_types, const Array & parameters)
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{
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assertNoParameters(name, parameters);
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if (argument_types.empty())
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throw Exception("Incorrect number of arguments for aggregate function " + name,
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ErrorCodes::NUMBER_OF_ARGUMENTS_DOESNT_MATCH);
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size_t num_args = argument_types.size();
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if (num_args == 1)
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{
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/// Specialized implementation for single argument of numeric type.
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if (auto res = createWithNumericBasedType<AggregateFunctionEntropy>(*argument_types[0], argument_types))
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return AggregateFunctionPtr(res);
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}
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/// Generic implementation for other types or for multiple arguments.
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return std::make_shared<AggregateFunctionEntropy<UInt128>>(argument_types);
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}
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}
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void registerAggregateFunctionEntropy(AggregateFunctionFactory & factory)
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{
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factory.registerFunction("entropy", createAggregateFunctionEntropy);
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}
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}
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