Struct ckb_db::read_only_db::ReadOnlyDB

pub struct ReadOnlyDB { /* private fields */ }

ReadOnlyDB wrapper

Implementations

impl ReadOnlyDB

pub fn open_cf<P, I, N>(path: P, cf_names: I) -> Result<Option<Self>> where
    P: AsRef<Path>,
    I: IntoIterator<Item = N>,
    N: AsRef<str>, 

The behavior is similar to DB::Open, except that it opens DB in read-only mode. One big difference is that when opening the DB as read-only, you don’t need to specify all Column Families – you can only open a subset of Column Families.

pub fn get_pinned_default(
    &self,
    key: &[u8]
) -> Result<Option<DBPinnableSlice<'_>>>

Return the value associated with a key using RocksDB’s PinnableSlice from the default column so as to avoid unnecessary memory copy.

pub fn get_pinned(
    &self,
    col: Col,
    key: &[u8]
) -> Result<Option<DBPinnableSlice<'_>>>

Return the value associated with a key using RocksDB’s PinnableSlice from the given column so as to avoid unnecessary memory copy.