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This commit is contained in:
Anton Popov 2022-10-25 22:27:11 +00:00
parent c4d4f2dbed
commit d8b09b430f
1 changed files with 8 additions and 0 deletions
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8
src/Storages/MergeTree/IDataPartStorage.h
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@ -211,6 +211,9 @@ public:
size_t buf_size,
const WriteSettings & settings) = 0;
/// A special const method to write transaction file.
/// It's const, because file with transaction metadata
/// can be modifed after part creation.
virtual std::unique_ptr<WriteBufferFromFileBase> writeTransactionFile(WriteMode mode) const = 0;
virtual void createFile(const String & name) = 0;
@ -237,7 +240,9 @@ public:
bool remove_new_dir_if_exists,
bool fsync_part_dir) = 0;
/// Starts a transaction of mutable operations.
virtual void beginTransaction() = 0;
/// Commits a transaction of mutable operations.
virtual void commitTransaction() = 0;
virtual bool hasActiveTransaction() const = 0;
};
@ -245,6 +250,9 @@ public:
using DataPartStoragePtr = std::shared_ptr<const IDataPartStorage>;
using MutableDataPartStoragePtr = std::shared_ptr<IDataPartStorage>;
/// A holder that encapsulates data part storage and
/// gives access to const storage from const methods
/// and to mutable storage from non-const methods.
class DataPartStorageHolder : public boost::noncopyable
{
public: