Struct KeyValueReadRevision 

pub struct KeyValueReadRevision(/* private fields */);

Opaque cache identity. Numeric index revisions alone do not distinguish undo branches or independent private transactions.

Implementations

impl KeyValueReadRevision

pub fn same_private_changes(&self, other: &Self) -> bool

Compare private changes for the same selected prefixes, independently of intervening committed writes. Unversioned or individual-record identities cannot establish this property.

pub fn follows_by_one_commit(&self, earlier: &Self) -> bool

Whether this committed view follows the committed state of earlier by exactly one record commit of the same database. earlier may include changes private to the transaction that observed it; this view may not. A session whose transaction wrote records after observing earlier, and then observes this view after committing, knows that its own commit is the only one between them.

pub fn same_committed_state(&self, other: &Self) -> bool

Whether both views include the same committed record state of one database, whatever private changes accompany either. Differences between them are then private to the observing transaction.

pub fn has_private_changes(&self) -> bool

Whether the selected record prefixes include changes private to this transaction. Unversioned view identities conservatively report private state because they cannot prove committed provenance.

pub fn fresh() -> Self

Allocate a distinct identity for a provider-owned view. Retain and clone it while that view is unchanged; allocate a fresh identity after writes or undo instead of reusing a numeric counter.

Trait Implementations

impl Clone for KeyValueReadRevision

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Eq for KeyValueReadRevision

impl PartialEq for KeyValueReadRevision

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

Equality operator ==.

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

Inequality operator !=.