Struct lmdb_rs::core::Cursor

pub struct Cursor<'txn> { /* fields omitted */ }

Methods

impl<'txn> Cursor<'txn>

fn to_first(&mut self) -> MdbResult<()>

Moves cursor to first entry

fn to_last(&mut self) -> MdbResult<()>

Moves cursor to last entry

fn to_key<'k, K: ToMdbValue>(&mut self, key: &'k K) -> MdbResult<()>

Moves cursor to first entry for key if it exists

fn to_gte_key<'k, K: ToMdbValue>(&mut self, key: &'k K) -> MdbResult<()>

Moves cursor to first entry for key greater than or equal to ke

fn to_item<K, V>(&mut self, key: &K, value: &V) -> MdbResult<()> where
    K: ToMdbValue,
    V: ToMdbValue, 

Moves cursor to specific item (for example, if cursor already points to a correct key and you need to delete a specific item through cursor)

fn to_gte_item<K, V>(&mut self, key: &K, value: &V) -> MdbResult<()> where
    K: ToMdbValue,
    V: ToMdbValue, 

Moves cursor to nearest item.

fn to_next_key(&mut self) -> MdbResult<()>

Moves cursor to next key, i.e. skip items with duplicate keys

fn to_next_item(&mut self) -> MdbResult<()>

Moves cursor to next item with the same key as current

fn to_prev_key(&mut self) -> MdbResult<()>

Moves cursor to prev entry, i.e. skips items with duplicate keys

fn to_prev_item(&mut self) -> MdbResult<()>

Moves cursor to prev item with the same key as current

fn to_first_item(&mut self) -> MdbResult<()>

Moves cursor to first item with the same key as current

fn to_last_item(&mut self) -> MdbResult<()>

Moves cursor to last item with the same key as current

fn get<'a, T: FromMdbValue + 'a, U: FromMdbValue + 'a>(
    &'a mut self
) -> MdbResult<(T, U)>

Retrieves current key/value as tuple

fn get_value<'a, V: FromMdbValue + 'a>(&'a mut self) -> MdbResult<V>

Retrieves current value

fn get_key<'a, K: FromMdbValue + 'a>(&'a mut self) -> MdbResult<K>

Retrieves current key

fn set<K: ToMdbValue, V: ToMdbValue>(
    &mut self,
    key: &K,
    value: &V,
    flags: c_uint
) -> MdbResult<()>

fn replace<V: ToMdbValue>(&mut self, value: &V) -> MdbResult<()>

Overwrites value for current item Note: overwrites max cur_value.len() bytes

fn add_item<V: ToMdbValue>(&mut self, value: &V) -> MdbResult<()>

Adds a new item when created with allowed duplicates

fn del(&mut self) -> MdbResult<()>

Deletes current key

fn del_item(&mut self) -> MdbResult<()>

Deletes only current item

Note that it doesn't check anything so it is caller responsibility to make sure that correct item is deleted if, for example, caller wants to delete only items of current key

fn del_all(&mut self) -> MdbResult<()>

Deletes all items with same key as current

fn item_count(&self) -> MdbResult<size_t>

Returns count of items with the same key as current

fn get_item<'k, K: ToMdbValue>(
    self,
    k: &'k K
) -> CursorItemAccessor<'txn, 'k, K>

Trait Implementations

impl<'txn> Debug for Cursor<'txn>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'txn> Drop for Cursor<'txn>

fn drop(&mut self)

A method called when the value goes out of scope.