Struct Snapshot 

pub struct Snapshot {
    pub snapshot_id: i64,
    pub parent_snapshot_id: Option<i64>,
    pub sequence_number: i64,
    pub timestamp_ms: i64,
    pub operation: Operation,
    pub manifest_list: String,
    pub summary: HashMap<String, String>,
    pub schema_id: i32,
}

A snapshot represents an immutable view of the table at a point in time.

Each snapshot contains a reference to a manifest list, which in turn references all the data files that make up the table at that point.

Lineage

Snapshots form a tree structure through parent references, allowing tracking of table lineage and enabling features like rollback.

Fields

snapshot_id: i64

Unique identifier for this snapshot.

parent_snapshot_id: Option<i64>

The ID of the parent snapshot, if any. The first snapshot has no parent (None).

sequence_number: i64

Monotonically increasing sequence number. Used to order operations across snapshots.

timestamp_ms: i64

Timestamp when this snapshot was created (ms since epoch).

operation: Operation

The operation that created this snapshot.

manifest_list: String

Path to the manifest list file for this snapshot.

summary: HashMap<String, String>

Summary statistics and operation metadata.

schema_id: i32

The schema ID used for this snapshot’s data.

Implementations

impl Snapshot

pub fn builder( snapshot_id: i64, manifest_list: impl Into<String>, ) -> SnapshotBuilder

Creates a new snapshot builder.

pub fn summary_property(&self, key: &str) -> Option<&str>

Returns the value of a summary property.

pub fn added_files_count(&self) -> Option<i64>

Returns the added files count from the summary.

pub fn added_records_count(&self) -> Option<i64>

Returns the added records count from the summary.

pub fn total_files_count(&self) -> Option<i64>

Returns the total files count from the summary.

pub fn total_records_count(&self) -> Option<i64>

Returns the total records count from the summary.

pub async fn all_files( &self, storage: &Storage, ) -> Result<(Vec<DataFile>, Vec<DataFile>)>

Loads all data and delete files for this snapshot.

Returns a tuple of (data_files, delete_files).

pub async fn all_data_files(&self, storage: &Storage) -> Result<Vec<DataFile>>

Loads all data files for this snapshot.

Trait Implementations

impl Clone for Snapshot

fn clone(&self) -> Snapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Snapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Snapshot

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Snapshot

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

where __S: Serializer,

Serialize this value into the given Serde serializer.