Struct SequenceValueAllocation 

pub struct SequenceValueAllocation {
    pub reservation: SequenceValueReservation,
    pub logged_value: Option<i64>,
}

A reservation with the durable position it requires.

Fields

reservation: SequenceValueReservation

logged_value: Option<i64>

The value the durable record must hold, as called and with no log count, before any value of the reservation is handed out. It is set when the reservation uses up the values an earlier record covered, and lies up to 32 fetches past the reservation, where PostgreSQL writes it to its log. A sequence that loses its exact position continues after this value, so no value at or below it is handed out twice.

Implementations

impl SequenceValueAllocation

pub fn record_value( &self, position: SequenceValuePosition, covering: Option<i64>, increment: i64, min_value: i64, max_value: i64, ) -> Option<i64>

The value the durable record must hold, as called and with no log count, before the reservation is handed out, or None when the record covers the reservation already. position is the position the reservation continues. covering is the value of the record known to cover that position, or None when the position was read from a record, which covers nothing past itself.

Trait Implementations

impl Clone for SequenceValueAllocation

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 SequenceValueAllocation

impl Debug for SequenceValueAllocation

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

Formats the value using the given formatter.

impl Eq for SequenceValueAllocation

impl PartialEq for SequenceValueAllocation

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SequenceValueAllocation