Struct lmdb::RoCursor
[−]
[src]
pub struct RoCursor<'txn> { /* fields omitted */ }
A read-only cursor for navigating the items within a database.
Trait Implementations
impl<'txn> Cursor<'txn> for RoCursor<'txn>
[src]
fn cursor(&self) -> *mut MDB_cursor
Returns a raw pointer to the underlying LMDB cursor. Read more
fn get(
&self,
key: Option<&[u8]>,
data: Option<&[u8]>,
op: c_uint
) -> Result<(Option<&'txn [u8]>, &'txn [u8])>
&self,
key: Option<&[u8]>,
data: Option<&[u8]>,
op: c_uint
) -> Result<(Option<&'txn [u8]>, &'txn [u8])>
Retrieves a key/data pair from the cursor. Depending on the cursor op, the current key may be returned. Read more
fn iter(&mut self) -> Iter<'txn>
Iterate over database items. The iterator will begin with item next after the cursor, and continue until the end of the database. For new cursors, the iterator will begin with the first item in the database. Read more
fn iter_start(&mut self) -> Iter<'txn>
Iterate over database items starting from the beginning of the database. Read more
fn iter_from<K>(&mut self, key: K) -> Iter<'txn> where
K: AsRef<[u8]>,
K: AsRef<[u8]>,
Iterate over database items starting from the given key. Read more
fn iter_dup(&mut self) -> IterDup<'txn>
Iterate over duplicate database items. The iterator will begin with the item next after the cursor, and continue until the end of the database. Each item will be returned as an iterator of its duplicates. Read more
fn iter_dup_start(&mut self) -> IterDup<'txn>
Iterate over duplicate database items starting from the beginning of the database. Each item will be returned as an iterator of its duplicates. Read more
fn iter_dup_from<K>(&mut self, key: &K) -> IterDup<'txn> where
K: AsRef<[u8]>,
K: AsRef<[u8]>,
Iterate over duplicate items in the database starting from the given key. Each item will be returned as an iterator of its duplicates. Read more
fn iter_dup_of<K>(&mut self, key: &K) -> Result<Iter<'txn>> where
K: AsRef<[u8]>,
K: AsRef<[u8]>,
Iterate over the duplicates of the item in the database with the given key. Read more