Struct ChangeLogEntry 

pub struct ChangeLogEntry {
    pub lsn: u64,
    pub timestamp: u64,
    pub entity_type: String,
    pub entity_id: [u8; 16],
    pub change_type: ChangeType,
    pub changed_fields: Vec<String>,
    pub before_data: Option<Vec<u8>>,
    pub after_data: Option<Vec<u8>>,
    pub schema_version: u64,
}

Persistent change log entry for CDC/replication.

Each mutation generates a changelog entry that is persisted with a monotonically increasing LSN (Log Sequence Number).

Fields

lsn: u64

Log Sequence Number - monotonically increasing identifier.

timestamp: u64

Timestamp in microseconds since epoch.

entity_type: String

The entity type that was modified.

entity_id: [u8; 16]

The ID of the modified entity.

change_type: ChangeType

Type of change (Insert, Update, Delete).

changed_fields: Vec<String>

List of fields that changed.

before_data: Option<Vec<u8>>

Full before-state (rkyv serialized bytes), None for inserts.

after_data: Option<Vec<u8>>

Full after-state (rkyv serialized bytes), None for deletes.

schema_version: u64

Schema version when the change occurred.

Implementations

impl ChangeLogEntry

pub fn insert( entity_type: impl Into<String>, entity_id: [u8; 16], after_data: Vec<u8>, changed_fields: Vec<String>, schema_version: u64, ) -> Self

Create a new changelog entry for an insert operation.

pub fn update( entity_type: impl Into<String>, entity_id: [u8; 16], before_data: Vec<u8>, after_data: Vec<u8>, changed_fields: Vec<String>, schema_version: u64, ) -> Self

Create a new changelog entry for an update operation.

pub fn delete( entity_type: impl Into<String>, entity_id: [u8; 16], before_data: Vec<u8>, schema_version: u64, ) -> Self

Create a new changelog entry for a delete operation.

Trait Implementations

impl Archive for ChangeLogEntry

where u64: Archive, String: Archive, [u8; 16]: Archive, ChangeType: Archive, Vec<String>: Archive, Option<Vec<u8>>: 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 = ArchivedChangeLogEntry

The archived representation of this type.

type Resolver = ChangeLogEntryResolver

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 ChangeLogEntry

fn clone(&self) -> ChangeLogEntry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChangeLogEntry

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ChangeLogEntry

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<ChangeLogEntry, __D> for Archived<ChangeLogEntry>

where u64: Archive, <u64 as Archive>::Archived: Deserialize<u64, __D>, String: Archive, <String as Archive>::Archived: Deserialize<String, __D>, [u8; 16]: Archive, <[u8; 16] as Archive>::Archived: Deserialize<[u8; 16], __D>, ChangeType: Archive, <ChangeType as Archive>::Archived: Deserialize<ChangeType, __D>, Vec<String>: Archive, <Vec<String> as Archive>::Archived: Deserialize<Vec<String>, __D>, Option<Vec<u8>>: Archive, <Option<Vec<u8>> as Archive>::Archived: Deserialize<Option<Vec<u8>>, __D>,

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

Deserializes using the given deserializer

impl PartialEq for ChangeLogEntry

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

where u64: Serialize<__S>, String: Serialize<__S>, [u8; 16]: Serialize<__S>, ChangeType: Serialize<__S>, Vec<String>: Serialize<__S>, Option<Vec<u8>>: 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 ChangeLogEntry

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 ChangeLogEntry