Struct ReadCommitted 

pub struct ReadCommitted;

Each statement sees everything committed before that statement started.

Cheapest level: no read set, and a writer never aborts on a stale snapshot because it re-reads the latest version first. Non-repeatable reads and phantoms are visible to the application.

Trait Implementations

impl Clone for ReadCommitted

fn clone(&self) -> ReadCommitted

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReadCommitted

impl Debug for ReadCommitted

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

Formats the value using the given formatter.

impl Default for ReadCommitted

fn default() -> ReadCommitted

Returns the “default value” for a type.

impl IsolationLevel for ReadCommitted

const NAME: &'static str = "ReadCommitted"

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

const REFRESH_SNAPSHOT_PER_STATEMENT: bool = true

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

const FIRST_COMMITTER_WINS: bool = false

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.