Struct MaterializedView 

pub struct MaterializedView {
    pub definition: ViewDefinition,
    pub rows: Vec<ViewRow>,
    pub last_updated_ms: i64,
    pub version: u64,
    pub is_stale: bool,
}

The cached result set of a named SPARQL view.

last_updated_ms is a Unix timestamp in milliseconds; version is incremented every time the view is refreshed.

Fields

definition: ViewDefinition

The definition that drives this view.

rows: Vec<ViewRow>

Cached result rows.

last_updated_ms: i64

Unix timestamp (ms) when the view was last refreshed.

version: u64

Monotonically increasing refresh counter.

is_stale: bool

Whether the cached rows are out-of-date.

Implementations

impl MaterializedView

pub fn new(definition: ViewDefinition, initial_rows: Vec<ViewRow>) -> Self

Create a new MaterializedView with the given initial rows.

last_updated_ms is set to the current wall-clock time and version starts at 0.

pub fn refresh(&mut self, new_rows: Vec<ViewRow>)

Replace the current rows with new_rows, clear the stale flag, and bump version.

pub fn invalidate(&mut self)

Mark the view as stale (i.e. its cached rows need to be recomputed).