Struct StorageOperationContext 

pub struct StorageOperationContext {
    pub transaction_id: Option<TransactionId>,
    pub read_timestamp: u64,
    pub write_timestamp: Option<u64>,
    pub read_only: bool,
    pub auto_commit: bool,
    pub mutation_recorder: Option<Arc<dyn TransactionMutationRecorder>>,
    pub auto_commit_group_start: Option<usize>,
    pub auto_commit_staging_start: Option<(usize, usize)>,
    pub auto_commit_wal_start: usize,
}

Immutable context bound to one storage operation scope.

Fields

transaction_id: Option<TransactionId>

read_timestamp: u64

write_timestamp: Option<u64>

read_only: bool

auto_commit: bool

mutation_recorder: Option<Arc<dyn TransactionMutationRecorder>>

auto_commit_group_start: Option<usize>

Undo log entry count at the start of this statement’s segment (group mode only). Used by finalize_operation to roll back only the failed statement’s segment when a shared undo log is in use.

auto_commit_staging_start: Option<(usize, usize)>

Staging buffer journal and index lengths at the start of this statement (group mode only). Used by finalize_operation to roll the shared transaction buffer back to the statement start.

auto_commit_wal_start: usize

Shared staged-WAL length at the start of this statement (group mode only). Used to truncate the group’s WAL redo back to the statement.

Implementations

impl StorageOperationContext

pub fn transaction_with_timestamps( transaction_id: TransactionId, read_timestamp: u64, write_timestamp: Option<u64>, read_only: bool, auto_commit: bool, ) -> StorageOperationContext

pub fn with_mutation_recorder( self, recorder: Arc<dyn TransactionMutationRecorder>, ) -> StorageOperationContext

pub fn snapshot_timestamp(&self) -> Option<u64>

Timestamp at which MVCC snapshots are registered for this operation.

Read-only operations pin their read snapshot; auto-commit writes pin the write timestamp (the statement both reads and writes at it).

Trait Implementations

impl Clone for StorageOperationContext

fn clone(&self) -> StorageOperationContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StorageOperationContext

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

Formats the value using the given formatter.

impl Eq for StorageOperationContext

impl PartialEq for StorageOperationContext

fn eq(&self, other: &StorageOperationContext) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.