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89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
#pragma once
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#include <Core/Row.h>
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#include <Core/Block.h>
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#include <Core/Types.h>
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#include <Core/NamesAndTypes.h>
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#include <Storages/MergeTree/MergeTreeIndexGranularity.h>
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#include <Storages/MergeTree/MergeTreeIndexGranularityInfo.h>
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#include <Storages/MergeTree/MergeTreeIndices.h>
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#include <Storages/MergeTree/MergeTreePartInfo.h>
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#include <Storages/MergeTree/MergeTreePartition.h>
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#include <Storages/MergeTree/MergeTreeDataPartChecksum.h>
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#include <Storages/MergeTree/MergeTreeDataPartTTLInfo.h>
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#include <Storages/MergeTree/KeyCondition.h>
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#include <Storages/MergeTree/IMergeTreeDataPart.h>
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#include <Columns/IColumn.h>
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#include <Poco/Path.h>
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#include <shared_mutex>
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namespace DB
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{
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struct ColumnSize;
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class MergeTreeData;
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/// Description of the data part.
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class MergeTreeDataPartCompact : public IMergeTreeDataPart
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{
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public:
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using Checksums = MergeTreeDataPartChecksums;
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using Checksum = MergeTreeDataPartChecksums::Checksum;
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MergeTreeDataPartCompact(
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const MergeTreeData & storage_,
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const String & name_,
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const MergeTreePartInfo & info_,
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const MergeTreeIndexGranularityInfo & index_granularity_info_,
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const DiskSpace::DiskPtr & disk_,
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const std::optional<String> & relative_path_ = {});
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MergeTreeDataPartCompact(
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MergeTreeData & storage_,
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const String & name_,
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const MergeTreeIndexGranularityInfo & index_granularity_info_,
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const DiskSpace::DiskPtr & disk_,
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const std::optional<String> & relative_path_ = {});
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MergeTreeReaderPtr getReader(
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const NamesAndTypesList & columns,
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const MarkRanges & mark_ranges,
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UncompressedCache * uncompressed_cache,
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MarkCache * mark_cache,
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const ReaderSettings & reader_settings_,
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const ValueSizeMap & avg_value_size_hints = ValueSizeMap{},
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const ReadBufferFromFileBase::ProfileCallback & profile_callback = ReadBufferFromFileBase::ProfileCallback{}) const override;
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MergeTreeWriterPtr getWriter(
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const NamesAndTypesList & columns_list,
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const std::vector<MergeTreeIndexPtr> & indices_to_recalc,
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const CompressionCodecPtr & default_codec_,
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const WriterSettings & writer_settings,
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const MergeTreeIndexGranularity & computed_index_granularity = {}) const override;
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bool isStoredOnDisk() const override { return true; }
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/// Returns the name of a column with minimum compressed size (as returned by getColumnSize()).
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/// If no checksums are present returns the name of the first physically existing column.
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String getColumnNameWithMinumumCompressedSize() const override;
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virtual Type getType() const override { return Type::COMPACT; }
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private:
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/// Loads marks index granularity into memory
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void loadIndexGranularity() override;
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ColumnSize getColumnSizeImpl(const String & name, const IDataType & type, std::unordered_set<String> * processed_substreams) const override;
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void checkConsistency(bool require_part_metadata);
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};
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// using MergeTreeDataPartState =IMergeTreeDataPart::State;
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}
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