Struct RocksDBSnapshot

pub struct RocksDBSnapshot { /* private fields */ }

A snapshot captures a point-in-time view of the DB at the time it’s created

Implementations

impl RocksDBSnapshot

pub unsafe fn new( db: &Arc<OptimisticTransactionDB>, ptr: *const rocksdb_snapshot_t, ) -> RocksDBSnapshot

Safety

This function is unsafe because it take raw pointer as arguments

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.

Trait Implementations

impl ConstHandle<rocksdb_snapshot_t> for RocksDBSnapshot

fn const_handle(&self) -> *const rocksdb_snapshot_t

impl DBIterator for RocksDBSnapshot

fn iter_opt( &self, col: Col, mode: IteratorMode<'_>, readopts: &ReadOptions, ) -> Result<DBIter<'_>>

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

fn iter(&self, col: Col, mode: IteratorMode<'_>) -> Result<DBIter<'_>>

Opens an iterator using the provided IteratorMode. This is used when you want to iterate over a specific ColumnFamily

impl Drop for RocksDBSnapshot

fn drop(&mut self)

Executes the destructor for this type.

impl<'a> GetPinnedCF<'a> for RocksDBSnapshot

type ColumnFamily = &'a ColumnFamily

type ReadOptions = &'a ReadOptions

fn get_pinned_cf_full<K: AsRef<[u8]>>( &'a self, cf: Option<Self::ColumnFamily>, key: K, readopts: Option<Self::ReadOptions>, ) -> Result<Option<DBPinnableSlice<'a>>, Error>

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

fn get_pinned_cf<K>( &'a self, cf: Self::ColumnFamily, key: K, ) -> Result<Option<DBPinnableSlice<'a>>, Error>

where K: AsRef<[u8]>,

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

fn get_pinned_cf_opt<K>( &'a self, cf: Self::ColumnFamily, key: K, readopts: Self::ReadOptions, ) -> Result<Option<DBPinnableSlice<'a>>, Error>

where K: AsRef<[u8]>,

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

impl Iterate for RocksDBSnapshot

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

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

where 'a: 'b,

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

where 'a: 'b,

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

where 'a: 'b,

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

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

where 'a: 'b,

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

where 'a: 'b,

impl IterateCF for RocksDBSnapshot

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

where 'a: 'b,

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

where 'a: 'b,

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

where 'a: 'b,

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

where 'a: 'b,

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

where 'a: 'b,

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

where 'a: 'b,

impl Read for RocksDBSnapshot

impl Send for RocksDBSnapshot

impl Sync for RocksDBSnapshot