Struct TransactionLogStore 

pub struct TransactionLogStore { /* private fields */ }

Helper for reading and writing the commit log under a table root.

Layout: <root>/_timeseries_log/0000000001.json <root>/_timeseries_log/0000000002.json <root>/_timeseries_log/CURRENT

Implementations

impl TransactionLogStore

pub const LOG_DIR_NAME: &str = storage::layout::LOG_DIR_NAME

Name of the subdirectory containing the commit log.

pub const CURRENT_FILE_NAME: &str = storage::layout::CURRENT_FILE_NAME

Name of the file that stores the current version pointer.

pub const COMMIT_FILENAME_DIGITS: usize = storage::layout::COMMIT_FILENAME_DIGITS

Number of digits used in zero-padded commit file names.

pub fn new(location: TableLocation) -> Self

Create a new TransactionLogStore rooted at a table directory.

pub fn location(&self) -> &TableLocation

Get the TableLocation of the LogStore.

pub async fn load_commit(&self, version: u64) -> Result<Commit, CommitError>

Load a single commit by version.

• On storage-layer failures, returns CommitError::Storage.
• On JSON parse failures, returns CommitError::CorruptState.

pub async fn load_current_version(&self) -> Result<u64, CommitError>

Load the CURRENT version pointer.

Behavior:

• If CURRENT does not exist, treat as a fresh table and return 0.
• If CURRENT contains invalid or empty content, return CorruptState.

impl TransactionLogStore

pub async fn rebuild_table_state(&self) -> Result<TableState, CommitError>

Rebuild the current TableState by replaying all commits up to CURRENT.

v0.1 behavior:

• If CURRENT == 0 (no commits), this returns CommitError::CorruptState.
• The first commit must include at least one UpdateTableMeta action to bootstrap TableMeta; the last UpdateTableMeta wins.

Trait Implementations

impl Clone for TransactionLogStore

fn clone(&self) -> TransactionLogStore

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TransactionLogStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.