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4088c0a7f3
Automated register all functions with below naming convention by iterating through the symbols: void DB::registerXXX(DB::FunctionFactory &)
43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
#include <Functions/IFunction.h>
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#include <Functions/FunctionFactory.h>
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namespace DB
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{
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namespace
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{
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class FunctionIdentity : public IFunction
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{
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public:
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static constexpr auto name = "identity";
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionIdentity>();
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}
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String getName() const override { return name; }
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size_t getNumberOfArguments() const override { return 1; }
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bool isSuitableForConstantFolding() const override { return false; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return false; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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return arguments.front();
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override
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{
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return arguments.front().column;
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}
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};
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}
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REGISTER_FUNCTION(Identity)
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{
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factory.registerFunction<FunctionIdentity>();
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}
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}
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