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48 lines
1.0 KiB
C++
48 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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/** materialize(x) - materialize the constant
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*/
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class FunctionMaterialize : public IFunction
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{
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public:
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static constexpr auto name = "materialize";
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static FunctionPtr create(const Context &)
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{
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return std::make_shared<FunctionMaterialize>();
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}
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/// Get the function name.
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String getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override
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{
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return 1;
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}
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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return arguments[0];
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}
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void executeImpl(Block & block, const ColumnNumbers & arguments, size_t result, size_t /*input_rows_count*/) override
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{
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block.getByPosition(result).column = block.getByPosition(arguments[0]).column->convertToFullColumnIfConst();
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}
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};
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void registerFunctionMaterialize(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionMaterialize>();
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}
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}
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