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43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
#pragma once
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#include <Processors/TTL/ITTLAlgorithm.h>
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#include <Interpreters/Aggregator.h>
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#include <Storages/MergeTree/MergeTreeData.h>
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namespace DB
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{
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/// Aggregates rows according to 'TTL expr GROUP BY key' description.
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/// Aggregation key must be the prefix of the sorting key.
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class TTLAggregationAlgorithm final : public ITTLAlgorithm
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{
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public:
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TTLAggregationAlgorithm(
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const TTLDescription & description_,
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const TTLInfo & old_ttl_info_,
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time_t current_time_,
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bool force_,
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const Block & header_,
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const MergeTreeData & storage_);
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void execute(Block & block) override;
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void finalize(const MutableDataPartPtr & data_part) const override;
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private:
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// Calculate aggregates of aggregate_columns into aggregation_result
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void calculateAggregates(const MutableColumns & aggregate_columns, size_t start_pos, size_t length);
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/// Finalize aggregation_result into result_columns
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void finalizeAggregates(MutableColumns & result_columns);
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const Block header;
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std::unique_ptr<Aggregator> aggregator;
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Row current_key_value;
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AggregatedDataVariants aggregation_result;
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ColumnRawPtrs key_columns;
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Aggregator::AggregateColumns columns_for_aggregator;
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bool no_more_keys = false;
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};
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}
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