Struct ckb_db::ReadOptions

pub struct ReadOptions { /* private fields */ }

Implementations

impl ReadOptions

pub fn set_snapshot<T>(&mut self, snapshot: &T) where
    T: ConstHandle<rocksdb_snapshot_t>, 

pub fn set_iterate_upper_bound<K>(&mut self, key: K) where
    K: AsRef<[u8]>, 

pub fn set_iterate_lower_bound<K>(&mut self, key: K) where
    K: AsRef<[u8]>, 

pub fn set_prefix_same_as_start(&mut self, v: bool)

pub fn set_total_order_seek(&mut self, v: bool)

pub fn set_readahead_size(&mut self, v: usize)

If non-zero, an iterator will create a new table reader which performs reads of the given size. Using a large size (> 2MB) can improve the performance of forward iteration on spinning disks. Default: 0

use ckb_rocksdb::{ReadOptions};

let mut opts = ReadOptions::default();
opts.set_readahead_size(4_194_304); // 4mb

pub fn input_or_default(
    input: Option<&ReadOptions>,
    default_readopts: &mut Option<ReadOptions>
) -> Result<*mut rocksdb_readoptions_t, Error>

Trait Implementations

impl Clone for ReadOptions

fn clone(&self) -> ReadOptions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for ReadOptions

fn default() -> ReadOptions

Returns the “default value” for a type.

impl Drop for ReadOptions

fn drop(&mut self)

Executes the destructor for this type.

impl<T> GetCF<ReadOptions> for T where
    T: Handle<rocksdb_t> + Read, 

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

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

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

impl Handle<rocksdb_readoptions_t> for ReadOptions

fn handle(&self) -> *mut rocksdb_readoptions_t