2019-12-09 13:12:54 +00:00
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#include <Functions/IFunctionImpl.h>
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2018-09-08 22:04:39 +00:00
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#include <Functions/FunctionFactory.h>
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namespace DB
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{
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2020-09-07 18:00:37 +00:00
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namespace
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{
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2018-09-08 22:04:39 +00:00
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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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2020-08-01 18:44:00 +00:00
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bool useDefaultImplementationForNulls() const override
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{
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return false;
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}
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2018-09-08 22:04:39 +00:00
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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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2020-10-14 14:04:50 +00:00
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void executeImpl(ColumnsWithTypeAndName & columns, const ColumnNumbers & arguments, size_t result, size_t /*input_rows_count*/) const override
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2018-09-08 22:04:39 +00:00
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{
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2020-10-14 14:04:50 +00:00
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columns[result].column = columns[arguments[0]].column->convertToFullColumnIfConst();
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2018-09-08 22:04:39 +00:00
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}
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};
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2020-09-07 18:00:37 +00:00
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}
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2018-09-08 22:04:39 +00:00
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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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