Struct WalSeqNo 

pub struct WalSeqNo {
    pub record_index: u64,
}

Application-assigned record number and durable checkpoint boundary.

An append uses the value as that record’s identity. A recovery or truncation checkpoint uses the same value as the first record still needed by the database. Consequently, after durably applying record n, persist WalSeqNo::record(n + 1) as the next checkpoint.

Fields

record_index: u64

Zero-based record index represented by this boundary.

Implementations

impl WalSeqNo

pub const ZERO: Self

Beginning of an untruncated log.

pub const fn record(record_index: u64) -> Self

Construct a record-boundary sequence number.

Trait Implementations

impl Clone for WalSeqNo

fn clone(&self) -> WalSeqNo

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for WalSeqNo

impl Debug for WalSeqNo

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

Formats the value using the given formatter.

impl Default for WalSeqNo

fn default() -> WalSeqNo

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for WalSeqNo

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for WalSeqNo

impl Hash for WalSeqNo

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 WalSeqNo

fn cmp(&self, other: &WalSeqNo) -> 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 WalSeqNo

fn eq(&self, other: &WalSeqNo) -> 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 WalSeqNo

fn partial_cmp(&self, other: &WalSeqNo) -> 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 Serialize for WalSeqNo

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for WalSeqNo