mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-06 16:40:48 +00:00
44 lines
972 B
C++
44 lines
972 B
C++
#include <iostream>
|
|
|
|
#include <Poco/SharedPtr.h>
|
|
|
|
#include <DB/IO/WriteBufferFromOStream.h>
|
|
#include <DB/Storages/StorageSystemNumbers.h>
|
|
#include <DB/DataStreams/LimitBlockInputStream.h>
|
|
#include <DB/DataStreams/TabSeparatedRowOutputStream.h>
|
|
#include <DB/DataStreams/copyData.h>
|
|
#include <DB/DataTypes/DataTypesNumberFixed.h>
|
|
|
|
using Poco::SharedPtr;
|
|
|
|
|
|
int main(int argc, char ** argv)
|
|
{
|
|
try
|
|
{
|
|
DB::StorageSystemNumbers table("Numbers");
|
|
|
|
DB::Names column_names;
|
|
column_names.push_back("number");
|
|
|
|
DB::Block sample;
|
|
DB::ColumnWithNameAndType col;
|
|
col.type = new DB::DataTypeUInt64;
|
|
sample.insert(col);
|
|
|
|
DB::WriteBufferFromOStream out_buf(std::cout);
|
|
|
|
DB::LimitBlockInputStream input(table.read(column_names, 0, 10)[0], 10, 96);
|
|
DB::TabSeparatedRowOutputStream output(out_buf, sample);
|
|
|
|
DB::copyData(input, output);
|
|
}
|
|
catch (const DB::Exception & e)
|
|
{
|
|
std::cerr << e.what() << ", " << e.message() << std::endl;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|