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37 lines
728 B
C++
37 lines
728 B
C++
#include <Columns/ColumnsNumber.h>
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#include <DataStreams/MergingAggregatedBlockInputStream.h>
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namespace DB
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{
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Block MergingAggregatedBlockInputStream::readImpl()
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{
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if (!executed)
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{
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executed = true;
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AggregatedDataVariants data_variants;
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Aggregator::CancellationHook hook = [&]() { return this->isCancelled(); };
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aggregator.setCancellationHook(hook);
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aggregator.mergeStream(children.back(), data_variants, max_threads);
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blocks = aggregator.convertToBlocks(data_variants, final, max_threads);
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it = blocks.begin();
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}
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Block res;
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if (isCancelled() || it == blocks.end())
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return res;
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res = std::move(*it);
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++it;
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return res;
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}
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}
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