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47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
#pragma once
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#include <Core/Row.h>
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#include <common/types.h>
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#include <Disks/IDisk.h>
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#include <IO/WriteBuffer.h>
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namespace DB
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{
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class Block;
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class MergeTreeData;
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struct FormatSettings;
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struct MergeTreeDataPartChecksums;
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struct StorageInMemoryMetadata;
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using StorageMetadataPtr = std::shared_ptr<const StorageInMemoryMetadata>;
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/// This class represents a partition value of a single part and encapsulates its loading/storing logic.
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struct MergeTreePartition
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{
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Row value;
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public:
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MergeTreePartition() = default;
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explicit MergeTreePartition(Row value_) : value(std::move(value_)) {}
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/// For month-based partitioning.
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explicit MergeTreePartition(UInt32 yyyymm) : value(1, yyyymm) {}
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String getID(const MergeTreeData & storage) const;
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String getID(const Block & partition_key_sample) const;
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void serializeText(const MergeTreeData & storage, WriteBuffer & out, const FormatSettings & format_settings) const;
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void load(const MergeTreeData & storage, const DiskPtr & disk, const String & part_path);
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void store(const MergeTreeData & storage, const DiskPtr & disk, const String & part_path, MergeTreeDataPartChecksums & checksums) const;
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void store(const Block & partition_key_sample, const DiskPtr & disk, const String & part_path, MergeTreeDataPartChecksums & checksums) const;
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void assign(const MergeTreePartition & other) { value.assign(other.value); }
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void create(const StorageMetadataPtr & metadata_snapshot, Block block, size_t row);
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};
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}
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