Struct Executor 

pub struct Executor<'a> { /* private fields */ }

Implementations

impl<'a> Executor<'a>

pub fn new(store: &'a GraphStore) -> Self

pub fn execute(&self, stmt: &Statement) -> Result<QueryResult, QueryError>

Dispatches on whether stmt ever mutates anything. A read-only statement (MATCH ... RETURN, is_read_only below) runs inside a ReadTransaction — a consistent snapshot that doesn’t contend for redb’s single-writer lock, so concurrent readers run in parallel instead of queueing behind each other. Everything else runs inside a WriteTransaction, committed or aborted as a whole — the crash-safety boundary from the plan (one statement = one commit). Every graph access below this point must go through the *_in_txn GraphStore methods, never the standalone self.store.* methods, which open (and would deadlock trying to re-open) their own transaction.