Struct CloneOrigin 

pub struct CloneOrigin {
    pub source_database: DatabaseId,
    pub source_collection: String,
    pub as_of_lsn: Lsn,
    pub clone_created_at: Lsn,
    pub kv_surrogate_ceiling: Option<u32>,
}

Identifies the source of a copy-on-write database clone.

Stored on each cloned StoredCollection; the read and write planners consult it to decide whether source delegation is needed.

Fields

source_database: DatabaseId

The source database this collection was cloned from.

source_collection: String

Collection name in the source database (scoped to source_database).

as_of_lsn: Lsn

WAL LSN up to which source rows are delegated on reads. Rows in the source with LSN > as_of_lsn are invisible through this clone regardless of query time.

clone_created_at: Lsn

WAL LSN at the moment this clone was created. Used to detect bitemporal queries that pre-date the clone.

kv_surrogate_ceiling: Option<u32>

Surrogate high-water captured from the source’s SurrogateAssigner at clone-create time. KV bindings allocated AFTER this value belong strictly to source-side writes that must not be visible from the resulting clone — the lazy KV read path uses this ceiling to filter source-delegated rows. None on legacy clones created before this field existed (no isolation enforced — matches the prior behaviour).

Trait Implementations

impl Archive for CloneOrigin

where DatabaseId: Archive, String: Archive, Lsn: Archive, Option<u32>: Archive,

const COPY_OPTIMIZATION: CopyOptimization<Self>

An optimization flag that allows the bytes of this type to be copied directly to a writer instead of calling serialize.

type Archived = ArchivedCloneOrigin

The archived representation of this type.

type Resolver = CloneOriginResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

fn resolve(&self, resolver: Self::Resolver, out: Place<Self::Archived>)

Creates the archived version of this value at the given position and writes it to the given output.

impl Clone for CloneOrigin

fn clone(&self) -> CloneOrigin

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CloneOrigin

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CloneOrigin

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<__D: Fallible + ?Sized> Deserialize<CloneOrigin, __D> for Archived<CloneOrigin>

where DatabaseId: Archive, <DatabaseId as Archive>::Archived: Deserialize<DatabaseId, __D>, String: Archive, <String as Archive>::Archived: Deserialize<String, __D>, Lsn: Archive, <Lsn as Archive>::Archived: Deserialize<Lsn, __D>, Option<u32>: Archive, <Option<u32> as Archive>::Archived: Deserialize<Option<u32>, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<CloneOrigin, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for CloneOrigin

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for CloneOrigin

fn eq(&self, other: &CloneOrigin) -> 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<__S: Fallible + ?Sized> Serialize<__S> for CloneOrigin

where DatabaseId: Serialize<__S>, String: Serialize<__S>, Lsn: Serialize<__S>, Option<u32>: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<Self as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Serialize for CloneOrigin

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for CloneOrigin

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl Eq for CloneOrigin

impl StructuralPartialEq for CloneOrigin