Struct TransactionId 

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

Identifies a transaction, also called an XID. Postgres’s TransactionId. See transam.h.

Holds a non-zero u32. 0 is Postgres’s InvalidTransactionId, so None stands for it in an Option<TransactionId>.

XIDs wrap around after 2^32, and are compared “on a circle” (TransactionIdPrecedes): An XID counts the 2^31 IDs after it as newer and the ones before it as older.

See Transactions and Identifiers and Preventing Transaction ID Wraparound Failures.

Implementations

impl TransactionId

pub fn from_raw(raw: u32) -> Option<Self>

The ID stored as raw, or None if raw is 0.

Trait Implementations

impl Clone for TransactionId

fn clone(&self) -> TransactionId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TransactionId

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

Formats the value using the given formatter.

impl From<TransactionId> for u32

fn from(xid: TransactionId) -> Self

Converts to this type from the input type.

impl Hash for TransactionId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TransactionId

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for TransactionId

impl Eq for TransactionId

impl StructuralPartialEq for TransactionId