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#pragma once
#include <Storages/MergeTree/MergeSelector.h>
namespace DB
{
/** Select parts to merge based on its level.
* Select first range of parts of parts_to_merge length with minimum level.
*/
class LevelMergeSelector : public IMergeSelector
{
public:
struct Settings
{
size_t parts_to_merge = 10;
};
explicit LevelMergeSelector(const Settings & settings_) : settings(settings_) {}
PartsRange select(
const PartsRanges & parts_ranges,
size_t max_total_size_to_merge) override;
private:
const Settings settings;
};
}
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