Struct RepeatableRead 

pub struct RepeatableRead;

A single snapshot for the whole transaction; repeated reads of the same key return the same value.

Under MVCC this is implemented identically to Snapshot; it exists as a separate type to document intent and to leave room for SQL-standard phantom semantics later.

Trait Implementations

impl Clone for RepeatableRead

fn clone(&self) -> RepeatableRead

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RepeatableRead

impl Debug for RepeatableRead

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

Formats the value using the given formatter.

impl Default for RepeatableRead

fn default() -> RepeatableRead

Returns the “default value” for a type.

impl IsolationLevel for RepeatableRead

const NAME: &'static str = "RepeatableRead"

Human-readable name, used in traces and error messages.

const REFRESH_SNAPSHOT_PER_STATEMENT: bool = false

Whether a fresh snapshot is taken before each statement rather than once at begin.

const FIRST_COMMITTER_WINS: bool = true

Whether the engine must check for write-write conflicts against versions committed after this transaction’s snapshot. False only for ReadCommitted, which re-reads the latest version before writing.

const VALIDATES_READS: bool = false

Whether reads are recorded and re-checked at commit. True only for Serializable.