Struct VectorVersionInfo 

pub struct VectorVersionInfo { /* private fields */ }

Tracks insert/delete visibility for a single vector (1024 rows).

Uses a Mutex-protected map from transaction ID to a bitmap of affected row indices within this vector.

Implementations

impl VectorVersionInfo

pub fn new() -> Self

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

Record that txn_id inserted a row at row_in_vector.

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

Record that txn_id deleted a row at row_in_vector.

pub fn reset(&self)

Drop all recorded inserts and deletes for this 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 is_visible( &self, row_in_vector: u32, snapshot_ts: u64, commit_history: &HashMap<u64, u64>, ) -> bool

Check whether a specific row is visible at the given snapshot.

A row is visible if it was inserted by a committed transaction whose commit_ts ≤ snapshot_ts, and not deleted by any committed transaction whose commit_ts ≤ snapshot_ts.

commit_history is used to look up commit timestamps for transaction IDs.

pub fn num_inserters(&self) -> usize

Number of unique transactions that inserted rows.

pub fn num_deleters(&self) -> usize

Number of unique transactions that deleted rows.

Trait Implementations

impl Clone for VectorVersionInfo

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 VectorVersionInfo

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

Formats the value using the given formatter.

impl Default for VectorVersionInfo

fn default() -> Self

Returns the “default value” for a type.