Struct ckb_rocksdb::Snapshot

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

A consistent view of the database at the point of creation.

use ckb_rocksdb::{prelude::*, IteratorMode};

let path = "_path_for_rocksdb_storage3";

    let db = DB::open_default(&path).unwrap();
    let snapshot = db.snapshot(); // Creates a longer-term snapshot of the DB, but closed when goes out of scope
    let mut iter = snapshot.iterator(IteratorMode::Start); // Make as many iterators as you'd like from one snapshot

Trait Implementations

impl<'a> ConstHandle<rocksdb_snapshot_t> for Snapshot<'a>

fn const_handle(&self) -> *const rocksdb_snapshot_t

impl<'a> Drop for Snapshot<'a>

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> GetCF<ReadOptions> for Snapshot<'a>

fn get_cf_full<K: AsRef<[u8]>>( &self, cf: Option<&ColumnFamily>, key: K, readopts: Option<&ReadOptions> ) -> Result<Option<DBVector>, Error>

fn get_cf<K: AsRef<[u8]>>( &self, cf: &ColumnFamily, key: K ) -> Result<Option<DBVector>, Error>

fn get_cf_opt<K: AsRef<[u8]>>( &self, cf: &ColumnFamily, key: K, readopts: &R ) -> Result<Option<DBVector>, Error>

impl Iterate for Snapshot<'_>

fn get_raw_iter<'a: 'b, 'b>( &'a self, readopts: &ReadOptions ) -> DBRawIterator<'b>

fn get_iter<'a: 'b, 'b>( &'a self, readopts: &ReadOptions, mode: IteratorMode<'_> ) -> DBIterator<'b>

fn iterator_opt<'a: 'b, 'b>( &'a self, mode: IteratorMode<'_>, readopts: &ReadOptions ) -> DBIterator<'b>

fn iterator<'a: 'b, 'b>(&'a self, mode: IteratorMode<'_>) -> DBIterator<'b>

fn full_iterator<'a: 'b, 'b>(&'a self, mode: IteratorMode<'_>) -> DBIterator<'b>

Opens an interator with set_total_order_seek enabled. This must be used to iterate across prefixes when set_memtable_factory has been called with a Hash-based implementation.

fn prefix_iterator<'a: 'b, 'b>(&'a self, prefix: &[u8]) -> DBIterator<'b>

fn raw_iterator<'a: 'b, 'b>(&'a self) -> DBRawIterator<'b>

impl IterateCF for Snapshot<'_>

fn get_raw_iter_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, readopts: &ReadOptions ) -> Result<DBRawIterator<'b>, Error>

fn get_iter_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, readopts: &ReadOptions, mode: IteratorMode<'_> ) -> Result<DBIterator<'b>, Error>

fn iterator_cf_opt<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, mode: IteratorMode<'_>, readopts: &ReadOptions ) -> Result<DBIterator<'b>, Error>

Opens an interator using the provided ReadOptions. This is used when you want to iterate over a specific ColumnFamily with a modified ReadOptions

fn iterator_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, mode: IteratorMode<'_> ) -> Result<DBIterator<'b>, Error>

fn full_iterator_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, mode: IteratorMode<'_> ) -> Result<DBIterator<'b>, Error>

fn prefix_iterator_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily, prefix: &[u8] ) -> Result<DBIterator<'b>, Error>

fn raw_iterator_cf<'a: 'b, 'b>( &'a self, cf_handle: &ColumnFamily ) -> Result<DBRawIterator<'b>, Error>

impl<'a> MultiGet<ReadOptions> for Snapshot<'a>

fn multi_get_full<K, I>( &self, keys: I, readopts: Option<&ReadOptions> ) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = K>,

fn multi_get<K, I>(&self, keys: I) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = K>,

fn multi_get_opt<K, I>( &self, keys: I, readopts: &R ) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = K>,

impl<'a> MultiGetCF<ReadOptions> for Snapshot<'a>

fn multi_get_cf_full<'m, K, I>( &self, keys: I, readopts: Option<&ReadOptions> ) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = (&'m ColumnFamily, K)>,

fn multi_get_cf<'a, K, I>( &self, keys_cf: I ) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = (&'a ColumnFamily, K)>,

fn multi_get_cf_opt<'a, K, I>( &self, keys_cf: I, readopts: &R ) -> Vec<Result<Option<DBVector>, Error>>where K: AsRef<[u8]>, I: IntoIterator<Item = (&'a ColumnFamily, K)>,

impl<'a> Read for Snapshot<'a>