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42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
#pragma once
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#include <Functions/IFunctionImpl.h>
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namespace DB
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{
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class ExternalModelsLoader;
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class Context;
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/// Evaluate external model.
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/// First argument - model name, the others - model arguments.
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/// * for CatBoost model - float features first, then categorical
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/// Result - Float64.
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class FunctionModelEvaluate final : public IFunction
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{
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public:
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static constexpr auto name = "modelEvaluate";
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static FunctionPtr create(const Context & context);
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explicit FunctionModelEvaluate(const ExternalModelsLoader & models_loader_) : models_loader(models_loader_) {}
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String getName() const override { return name; }
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bool isVariadic() const override { return true; }
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bool isDeterministic() const override { return false; }
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bool useDefaultImplementationForNulls() const override { return false; }
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size_t getNumberOfArguments() const override { return 0; }
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DataTypePtr getReturnTypeImpl(const ColumnsWithTypeAndName & arguments) const override;
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & result_type, size_t input_rows_count) const override;
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private:
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const ExternalModelsLoader & models_loader;
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};
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}
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