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40 lines
871 B
C++
40 lines
871 B
C++
#include <DB/Columns/ColumnsNumber.h>
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#include <DB/DataStreams/AggregatingBlockInputStream.h>
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namespace DB
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{
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AggregatingBlockInputStream::AggregatingBlockInputStream(BlockInputStreamPtr input_,
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const Names & key_names, const AggregateDescriptions & aggregates,
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bool overflow_row_, bool final_, size_t max_rows_to_group_by_, OverflowMode group_by_overflow_mode_)
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: final(final_), has_been_read(false)
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{
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children.push_back(input_);
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aggregator = new Aggregator(key_names, aggregates, overflow_row_, max_rows_to_group_by_, group_by_overflow_mode_);
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}
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Block AggregatingBlockInputStream::readImpl()
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{
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if (has_been_read)
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return Block();
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has_been_read = true;
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AggregatedDataVariants data_variants;
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aggregator->execute(children.back(), data_variants);
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if (isCancelled())
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return Block();
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return aggregator->convertToBlock(data_variants, final);
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}
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}
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