Struct WriteBatch

pub struct WriteBatch { /* private fields */ }

An atomic batch of write operations.

Making an atomic commit of several writes:

use rocksdb::{DB, WriteBatch};

let db = DB::open_default("path/for/rocksdb/storage1").unwrap();
{
    let mut batch = WriteBatch::default();
    batch.put(b"my key", b"my value");
    batch.put(b"key2", b"value2");
    batch.put(b"key3", b"value3");
    db.write(batch); // Atomically commits the batch
}

Implementations

impl WriteBatch

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn put(&mut self, key: &[u8], value: &[u8]) -> Result<(), Error>

Insert a value into the database under the given key.

pub fn put_cf( &mut self, cf: ColumnFamily, key: &[u8], value: &[u8], ) -> Result<(), Error>

pub fn merge(&mut self, key: &[u8], value: &[u8]) -> Result<(), Error>

pub fn merge_cf( &mut self, cf: ColumnFamily, key: &[u8], value: &[u8], ) -> Result<(), Error>

pub fn delete(&mut self, key: &[u8]) -> Result<(), Error>

Remove the database entry for key.

Returns an error if the key was not found.

pub fn delete_cf(&mut self, cf: ColumnFamily, key: &[u8]) -> Result<(), Error>

Trait Implementations

impl Default for WriteBatch

fn default() -> WriteBatch

Returns the “default value” for a type.

impl Drop for WriteBatch

fn drop(&mut self)

Executes the destructor for this type.