Struct VersionInfo 

pub struct VersionInfo { /* private fields */ }

Per-node-group version tracking.

Contains one VectorVersionInfo per vector-sized chunk of the node group. A “vector” is NODE_GROUP_SIZE / vectors rows — typically 1024 rows each.

Note: Clone is implemented manually because Mutex is not Clone.

Implementations

impl VersionInfo

pub fn new(total_rows: usize) -> Self

Create a new VersionInfo for a node group of total_rows capacity.

pub fn insert(&self, txn_id: u64, row: u32)

Record an insert by txn_id at global row index.

pub fn delete(&self, txn_id: u64, row: u32)

Record a delete by txn_id at global row index.

pub fn reset(&self)

Drop all recorded inserts and deletes across every vector.

Called when the owning node group’s in-memory buffer is cleared for reuse (spill/restore), so stale row-offset records do not collide with rows appended afterwards at the same offsets.

pub fn num_inserters(&self) -> usize

Total number of unique inserting transactions across all vectors.

pub fn num_deleters(&self) -> usize

Total number of unique deleting transactions across all vectors.

pub fn is_visible( &self, row: u32, snapshot_ts: u64, commit_history: &HashMap<u64, u64>, ) -> bool

Check whether global row is visible at snapshot_ts.

Trait Implementations

impl Clone for VersionInfo

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VersionInfo

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

Formats the value using the given formatter.