Struct VersionedReadEntry 

pub struct VersionedReadEntry {
    pub engine: EngineTag,
    pub collection: String,
    pub key: ReadKeyIdent,
    pub read_lsn: Lsn,
}

One LSN-versioned, predicate-aware read observed by a transaction, carried on the replicated Calvin TxClass so participants can validate it at the commit serialization point.

read_lsn is the responding shard’s write-LSN watermark at read time. The enclosing TxClass scopes the tenant; per-database scoping is carried by the transaction as a whole.

Fields

engine: EngineTag

Which engine served the read.

collection: String

The collection the read observed.

key: ReadKeyIdent

Point-key or collection-scoped-predicate identity of the observation.

read_lsn: Lsn

The responding shard’s write-LSN watermark at read time.

Trait Implementations

impl Clone for VersionedReadEntry

fn clone(&self) -> VersionedReadEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VersionedReadEntry

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for VersionedReadEntry

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for VersionedReadEntry

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for VersionedReadEntry

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 VersionedReadEntry

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for VersionedReadEntry

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 VersionedReadEntry

impl ToMessagePack for VersionedReadEntry

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

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