#include #include namespace DB { namespace { /** materialize(x) - materialize the constant */ class FunctionMaterialize : public IFunction { public: static constexpr auto name = "materialize"; static FunctionPtr create(const Context &) { return std::make_shared(); } bool useDefaultImplementationForNulls() const override { return false; } /// Get the function name. String getName() const override { return name; } size_t getNumberOfArguments() const override { return 1; } DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override { return arguments[0]; } ColumnPtr executeImpl(ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t /*input_rows_count*/) const override { return arguments[0].column->convertToFullColumnIfConst(); } }; } void registerFunctionMaterialize(FunctionFactory & factory) { factory.registerFunction(); } }