Struct WriteBatch

pub struct WriteBatch { /* private fields */ }

A WriteBatch contains entries to be written to a MemTable (for example) in a compact form.

The storage format is (with the respective length in bytes)

[tag: 1, keylen: ~var, key: keylen, vallen: ~var, val: vallen]

Implementations

impl WriteBatch

pub fn set_contents(&mut self, from: &[u8])

Initializes a WriteBatch with a serialized WriteBatch.

pub fn put(&mut self, k: &[u8], v: &[u8])

Adds an entry to a WriteBatch, to be added to the database.

pub fn delete(&mut self, k: &[u8])

Marks an entry to be deleted from the database.

pub fn clear(&mut self)

Clear the contents of a WriteBatch.

pub fn count(&self) -> u32

Returns how many operations are in a batch.

pub fn sequence(&self) -> u64

pub fn iter(&self) -> WriteBatchIter<'_>

pub fn insert_into_memtable(&self, seq: u64, mt: &mut MemTable)

pub fn encode(self, seq: u64) -> Vec<u8>

Trait Implementations

impl Default for WriteBatch

fn default() -> Self

Returns the “default value” for a type.