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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
#include <iostream>
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#include <IO/WriteBufferFromOStream.h>
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#include <Storages/System/StorageSystemNumbers.h>
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#include <DataStreams/LimitBlockInputStream.h>
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#include <Formats/FormatFactory.h>
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#include <DataStreams/copyData.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <Interpreters/Context.h>
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#include <Processors/Executors/TreeExecutorBlockInputStream.h>
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int main(int, char **)
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try
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{
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using namespace DB;
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StoragePtr table = StorageSystemNumbers::create(StorageID("test", "numbers"), false);
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Names column_names;
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column_names.push_back("number");
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Block sample;
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ColumnWithTypeAndName col;
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col.type = std::make_shared<DataTypeUInt64>();
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sample.insert(std::move(col));
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WriteBufferFromOStream out_buf(std::cout);
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auto context = Context::createGlobal();
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context.makeGlobalContext();
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QueryProcessingStage::Enum stage = table->getQueryProcessingStage(context);
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auto stream = std::make_shared<TreeExecutorBlockInputStream>(std::move(table->read(column_names, {}, context, stage, 10, 1)[0]));
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LimitBlockInputStream input(stream, 10, 96);
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BlockOutputStreamPtr out = FormatFactory::instance().getOutput("TabSeparated", out_buf, sample, context);
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copyData(input, *out);
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return 0;
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}
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catch (const DB::Exception & e)
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{
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std::cerr << e.what() << ", " << e.displayText() << std::endl;
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return 1;
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}
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