Enum TxTimestampOrId 

pub enum TxTimestampOrId {
    Timestamp(u64),
    Id(TxId),
}

Tagged-union “this version is in-flight under transaction id” vs. “this version was committed at timestamp ts”. Per the plan, row versions carry a begin: TxTimestampOrId so reads can ignore versions belonging to still-open transactions while still seeing the latest committed version.

Phase 11.4 will be the first consumer; defining it here keeps the type stable across the in-flight sub-phases so callers don’t have to chase a moving target.

Variants

Timestamp(u64)

Committed timestamp — visible to any transaction whose begin_ts >= this.

Id(TxId)

In-flight transaction id — invisible to every other reader until the producing transaction commits and stamps its versions with a timestamp.

Trait Implementations

impl Clone for TxTimestampOrId

fn clone(&self) -> TxTimestampOrId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TxTimestampOrId

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

Formats the value using the given formatter.

impl PartialEq for TxTimestampOrId

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

impl Eq for TxTimestampOrId

impl StructuralPartialEq for TxTimestampOrId