mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-01 22:20:50 +00:00
99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
#include <iostream>
|
|
#include <iomanip>
|
|
|
|
#include <DB/DataTypes/DataTypesNumberFixed.h>
|
|
#include <DB/DataTypes/DataTypeString.h>
|
|
|
|
#include <DB/Columns/ColumnsNumber.h>
|
|
#include <DB/Columns/ColumnString.h>
|
|
|
|
#include <DB/DataStreams/OneBlockInputStream.h>
|
|
|
|
#include <DB/Interpreters/Aggregator.h>
|
|
|
|
#include <DB/AggregateFunctions/AggregateFunctionFactory.h>
|
|
|
|
|
|
int main(int argc, char ** argv)
|
|
{
|
|
using namespace DB;
|
|
|
|
try
|
|
{
|
|
size_t n = argc == 2 ? atoi(argv[1]) : 10;
|
|
|
|
Block block;
|
|
|
|
ColumnWithTypeAndName column_x;
|
|
column_x.name = "x";
|
|
column_x.type = std::make_shared<DataTypeInt16>();
|
|
auto x = std::make_shared<ColumnInt16>();
|
|
column_x.column = x;
|
|
auto & vec_x = x->getData();
|
|
|
|
vec_x.resize(n);
|
|
for (size_t i = 0; i < n; ++i)
|
|
vec_x[i] = i % 9;
|
|
|
|
block.insert(column_x);
|
|
|
|
const char * strings[] = {"abc", "def", "abcd", "defg", "ac"};
|
|
|
|
ColumnWithTypeAndName column_s1;
|
|
column_s1.name = "s1";
|
|
column_s1.type = std::make_shared<DataTypeString>();
|
|
column_s1.column = std::make_shared<ColumnString>();
|
|
|
|
for (size_t i = 0; i < n; ++i)
|
|
column_s1.column->insert(std::string(strings[i % 5]));
|
|
|
|
block.insert(column_s1);
|
|
|
|
ColumnWithTypeAndName column_s2;
|
|
column_s2.name = "s2";
|
|
column_s2.type = std::make_shared<DataTypeString>();
|
|
column_s2.column = std::make_shared<ColumnString>();
|
|
|
|
for (size_t i = 0; i < n; ++i)
|
|
column_s2.column->insert(std::string(strings[i % 3]));
|
|
|
|
block.insert(column_s2);
|
|
|
|
BlockInputStreamPtr stream = std::make_shared<OneBlockInputStream>(block);
|
|
AggregatedDataVariants aggregated_data_variants;
|
|
|
|
Names key_column_names;
|
|
key_column_names.emplace_back("x");
|
|
key_column_names.emplace_back("s1");
|
|
|
|
AggregateFunctionFactory factory;
|
|
|
|
AggregateDescriptions aggregate_descriptions(1);
|
|
|
|
DataTypes empty_list_of_types;
|
|
aggregate_descriptions[0].function = factory.get("count", empty_list_of_types);
|
|
|
|
Aggregator::Params params(key_column_names, aggregate_descriptions, false);
|
|
Aggregator aggregator(params);
|
|
|
|
{
|
|
Stopwatch stopwatch;
|
|
stopwatch.start();
|
|
|
|
aggregator.execute(stream, aggregated_data_variants);
|
|
|
|
stopwatch.stop();
|
|
std::cout << std::fixed << std::setprecision(2)
|
|
<< "Elapsed " << stopwatch.elapsedSeconds() << " sec."
|
|
<< ", " << n / stopwatch.elapsedSeconds() << " rows/sec."
|
|
<< std::endl;
|
|
}
|
|
}
|
|
catch (const Exception & e)
|
|
{
|
|
std::cerr << e.displayText() << std::endl;
|
|
}
|
|
|
|
return 0;
|
|
}
|