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68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
#pragma once
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#include <optional>
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#include <base/types.h>
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#include <Storages/MergeTree/MergeTreeDataPartType.h>
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#include <Disks/IDisk.h>
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#include <Storages/MergeTree/IDataPartStorage.h>
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namespace DB
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{
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class MergeTreeData;
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/** Various types of mark files are stored in files with various extensions:
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* .mrk, .mrk2, .mrk3, .cmrk, .cmrk2, .cmrk3.
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* This helper allows to obtain mark type from file extension and vice versa.
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*/
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struct MarkType
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{
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MarkType(std::string_view extension);
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MarkType(bool adaptive_, bool compressed_, MergeTreeDataPartType::Value part_type_);
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static bool isMarkFileExtension(std::string_view extension);
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std::string getFileExtension() const;
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bool adaptive = false;
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bool compressed = false;
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MergeTreeDataPartType::Value part_type = MergeTreeDataPartType::Unknown;
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};
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/// Meta information about index granularity
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struct MergeTreeIndexGranularityInfo
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{
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public:
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MarkType mark_type;
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/// Fixed size in rows of one granule if index_granularity_bytes is zero
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size_t fixed_index_granularity = 0;
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/// Approximate bytes size of one granule
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size_t index_granularity_bytes = 0;
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MergeTreeIndexGranularityInfo(const MergeTreeData & storage, MergeTreeDataPartType type_);
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MergeTreeIndexGranularityInfo(const MergeTreeData & storage, MarkType mark_type_);
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MergeTreeIndexGranularityInfo(MergeTreeDataPartType type_, bool is_adaptive_, size_t index_granularity_, size_t index_granularity_bytes_);
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void changeGranularityIfRequired(const IDataPartStorage & data_part_storage);
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String getMarksFilePath(const String & path_prefix) const
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{
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return path_prefix + mark_type.getFileExtension();
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}
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size_t getMarkSizeInBytes(size_t columns_num = 1) const;
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static std::optional<MarkType> getMarksTypeFromFilesystem(const IDataPartStorage & data_part_storage);
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};
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constexpr inline auto getNonAdaptiveMrkSizeWide() { return sizeof(UInt64) * 2; }
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constexpr inline auto getAdaptiveMrkSizeWide() { return sizeof(UInt64) * 3; }
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inline size_t getAdaptiveMrkSizeCompact(size_t columns_num);
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}
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