Struct TemporalQuery 

pub struct TemporalQuery {
    pub as_of: Option<ClockTime>,
    pub as_committed: Option<ClockTime>,
}

Bi-temporal query descriptor. Both fields default to None, which means “use the pipeline’s current commit watermark” — so an unspecified query is a current-state read.

Fields

as_of: Option<ClockTime>

Valid-time point: “what was true at this time?” None ⇒ use the pipeline’s latest commit as the point.

as_committed: Option<ClockTime>

Transaction-time point: “what did the librarian know by this time?” None ⇒ use the pipeline’s latest commit.

Implementations

impl TemporalQuery

pub const fn current() -> Self

Current-state read — (now, now) per § 7.1.

pub const fn as_of(t: ClockTime) -> Self

As-of-valid-time read — (T, now) per § 7.2.

pub const fn as_committed(t: ClockTime) -> Self

Transaction-time snapshot — (now, T_c) per § 7.3.

pub const fn bi_temporal(as_of: ClockTime, as_committed: ClockTime) -> Self

Fully-specified bi-temporal point per § 7.4.

Trait Implementations

impl Clone for TemporalQuery

fn clone(&self) -> TemporalQuery

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TemporalQuery

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

Formats the value using the given formatter.

impl Default for TemporalQuery

fn default() -> TemporalQuery

Returns the “default value” for a type.

impl PartialEq for TemporalQuery

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

impl Eq for TemporalQuery

impl StructuralPartialEq for TemporalQuery