Struct Xid 

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

A transaction id, 64 bits, local to the node, assigned at the first write.

PostgreSQL clients see the low 32 bits as xid and the full value as xid8. PostgreSQL reserves the 32-bit values 0, 1 and 2, so the counter skips each value whose low 32 bits are one of them (spec/11 section 11.9).

Implementations

impl Xid

pub const FIRST: Xid

The first id.

pub const FROZEN_XID: u32 = 2

The 32-bit id that PostgreSQL uses for a frozen row.

pub const fn from_bits(bits: u64) -> Option<Xid>

The id with this stored value. Returns None for a value that the counter skips.

pub const fn bits(self) -> u64

The stored value, which is also xid8.

pub const fn xid32(self) -> u32

The 32-bit xid.

pub const fn next(self) -> Xid

The next id.

Trait Implementations

impl Clone for Xid

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Xid

impl Debug for Xid

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

Formats the value using the given formatter.

impl Display for Xid

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

Formats the value using the given formatter.

impl Eq for Xid

impl FromStr for Xid

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Xid, Error>

Parses a string s to return a value of this type.

impl Hash for Xid

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 Ord for Xid

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Xid

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Xid

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Xid