Enum IsolationLevel 

pub enum IsolationLevel {
    ReadUncommitted,
    ReadCommitted,
    RepeatableRead,
    Serializable,
}

v7.38 轴 4 — PG-standard isolation levels. SPG accepts all four at parse time and tracks the selected value on the engine. The actual semantic differentiation (REPEATABLE READ snapshot, SERIALIZABLE SSI) lands in the v7.38 isolation framework train; today every level reads as effective READ COMMITTED (which is also how PG treats READ UNCOMMITTED — it silently upgrades to READ COMMITTED). Default = ReadCommitted.

Variants

ReadUncommitted

ReadCommitted

RepeatableRead

Serializable

Implementations

impl IsolationLevel

pub fn from_pg_name(name: &str) -> Option<Self>

Canonical PG-style display name, as SHOW transaction_isolation would return it. v7.39 (round 770, F31 tranche 6 #154) — PG KEEPS the “read uncommitted” label (measured: BEGIN ISOLATION LEVEL READ UNCOMMITTED; SHOW transaction_isolation answers read uncommitted) and only BEHAVES as read committed; the old fold renamed the label too. v7.39 — the MySQL display name, which is NOT the PG one: MySQL hyphenates and upper-cases. Measured on MySQL 9.7.2 by setting each level and reading @@transaction_isolation back: READ-UNCOMMITTED / READ-COMMITTED / REPEATABLE-READ / SERIALIZABLE (the last has no hyphen because it is one word).

This exists so the two MySQL surfaces cannot drift: both SHOW VARIABLES and @@transaction_isolation used to carry their own hard-coded literal, and the literals disagreed — one said REPEATABLE-READ while the engine ran read committed. v7.39 — parse what default_transaction_isolation holds. PG accepts the SQL spellings and stores them lower-cased with a space; anything else is not a level this understands and the caller keeps its own default rather than guessing.

pub fn as_mysql_str(self) -> &'static str

pub fn as_pg_str(self) -> &'static str

Trait Implementations

impl Clone for IsolationLevel

fn clone(&self) -> IsolationLevel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IsolationLevel

impl Debug for IsolationLevel

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

Formats the value using the given formatter.

impl Default for IsolationLevel

fn default() -> IsolationLevel

Returns the “default value” for a type.

impl Display for IsolationLevel

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

Formats the value using the given formatter.

impl Eq for IsolationLevel

impl PartialEq for IsolationLevel

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IsolationLevel