Struct XLogRecPtr 

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

A position (in bytes) in the write-ahead log, also called an LSN (Log Sequence Number). Postgres’s XLogRecPtr, from xlogdefs.h.

Holds a non-zero u64. 0 is Postgres’s InvalidXLogRecPtr, so None stands for it in an Option<XLogRecPtr>.

See WAL Internals.

Implementations

impl XLogRecPtr

pub fn from_raw(raw: u64) -> Option<Self>

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

Trait Implementations

impl Clone for XLogRecPtr

fn clone(&self) -> XLogRecPtr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for XLogRecPtr

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

Formats the value using the given formatter.

impl From<XLogRecPtr> for u64

fn from(lsn: XLogRecPtr) -> Self

Converts to this type from the input type.

impl Hash for XLogRecPtr

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 XLogRecPtr

fn cmp(&self, other: &XLogRecPtr) -> 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.

impl PartialEq for XLogRecPtr

fn eq(&self, other: &XLogRecPtr) -> 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 PartialOrd for XLogRecPtr

fn partial_cmp(&self, other: &XLogRecPtr) -> 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 Copy for XLogRecPtr

impl Eq for XLogRecPtr

impl StructuralPartialEq for XLogRecPtr