Struct EvalCtx 

pub struct EvalCtx<'a> {
    pub lmpg: &'a Lmpg,
    pub snap: QuerySnapshot,
    pub is_cancelled: Option<&'a dyn Fn() -> bool>,
    /* private fields */
}

Traversal-capable evaluation context. Records-perspective execution routes through this when the where tree contains Expr::Related.

Fields

lmpg: &'a Lmpg

Engine handle used for tenant scope and store access.

snap: QuerySnapshot

Pinned snapshot all traversal reads resolve against.

is_cancelled: Option<&'a dyn Fn() -> bool>

Cooperative cancellation probe, when the caller supplied one.

Implementations

impl<'a> EvalCtx<'a>

pub fn new(lmpg: &'a Lmpg) -> Result<Self, QueryError>

Open a context pinned to the store’s current committed view.

Errors

Propagates a rushdb_storage::StorageError if the read view cannot be opened.

pub fn check_cancelled(&self) -> Result<(), QueryError>

Poll the cancellation probe between traversal steps. A no-op when the caller supplied no probe.

Errors

Returns QueryError::Cancelled when the probe requests a stop.