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83 lines
1.7 KiB
C++
83 lines
1.7 KiB
C++
#include <iostream>
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#include <iomanip>
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#include <Poco/Stopwatch.h>
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#include <DB/Functions/FunctionsArithmetic.h>
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int main(int argc, char ** argv)
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{
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try
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{
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size_t n = atoi(argv[1]);
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DB::ColumnWithNameAndType descr1;
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DB::ColumnUInt8 * col1 = new DB::ColumnUInt8;
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descr1.type = new DB::DataTypeUInt8;
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descr1.column = col1;
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descr1.name = "x";
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col1->getData().resize(n);
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DB::ColumnWithNameAndType descr2;
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DB::ColumnInt16 * col2 = new DB::ColumnInt16;
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descr2.type = new DB::DataTypeInt16;
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descr2.column = col2;
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descr2.name = "x";
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DB::Block block;
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block.insert(descr1);
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block.insert(descr2);
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col2->getData().resize(n);
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for (size_t i = 0; i < n; ++i)
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{
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col1->getData()[i] = 10;
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col2->getData()[i] = 3;
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}
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DB::FunctionDivideFloating f;
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DB::DataTypes arg_types;
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arg_types.push_back(descr1.type);
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arg_types.push_back(descr2.type);
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DB::ColumnNumbers arg_nums;
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arg_nums.push_back(0);
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arg_nums.push_back(1);
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size_t res_num = 2;
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DB::DataTypePtr res_type = f.getReturnType(arg_types);
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DB::ColumnWithNameAndType descr_res;
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descr_res.type = res_type;
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descr_res.name = "z";
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{
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Poco::Stopwatch stopwatch;
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stopwatch.start();
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f.execute(block, arg_nums, res_num);
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stopwatch.stop();
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std::cout << std::fixed << std::setprecision(2)
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<< "Elapsed " << stopwatch.elapsed() / 1000000.0 << " sec."
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<< ", " << n * 1000000 / stopwatch.elapsed() << " rows/sec."
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<< std::endl;
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}
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DB::Float64 x = 0;
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for (size_t i = 0; i < n; ++i)
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x += DB::get<DB::Float64>((*block.getByPosition(2).column)[i]);
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std::cout << x << std::endl;
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}
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catch (const DB::Exception & e)
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{
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std::cerr << e.displayText() << std::endl;
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throw;
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}
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return 0;
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}
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