Method open_existing

atomic-core/src/pristine/txn/pristine.rs:200–204

Open an existing pristine database without the table-init write lock. Unlike [`open`](Self::open), this method skips the `begin_write()` + table-initialization transaction. It assumes all tables already exist (true for any database previously created by `open` or `init`). The returned `Pristine` still supports [`write_txn`](Self::write_txn) — the write lock is deferred until you actually need o

(path: P)

    /// Returns an error if the database file doesn't exist, is corrupted,
    /// or the ID-scan read transaction fails.
    pub fn open_existing<P: AsRef<Path>>(path: P) -> PristineResult<Self> {
        let cache_bytes = 8 * 1024 * 1024 * 1024; // 8 GiB
        let db = Builder::new().set_cache_size(cache_bytes).open(path)?;
        Self::scan_ids(db)
    }

    /// Open an existing pristine database in read-only mode
    ///