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31 lines
771 B
C++
31 lines
771 B
C++
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#pragma once
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#include <Backups/IBackupEntry.h>
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namespace DB
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{
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/// Concatenates data of two backup entries.
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class BackupEntryConcat : public IBackupEntry
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{
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public:
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/// The constructor is allowed to not set `checksum_`, in that case it will be calculated from the data.
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BackupEntryConcat(
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BackupEntryPtr first_source_,
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BackupEntryPtr second_source_,
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const std::optional<UInt128> & checksum_ = {});
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UInt64 getSize() const override;
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std::optional<UInt128> getChecksum() const override { return checksum; }
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std::unique_ptr<ReadBuffer> getReadBuffer() const override;
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private:
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BackupEntryPtr first_source;
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BackupEntryPtr second_source;
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mutable std::optional<UInt64> size;
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std::optional<UInt128> checksum;
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};
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}
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