Struct DBWriteBatch

pub struct DBWriteBatch { /* private fields */ }

A write batch holds a collection of updates to apply atomically to a database. Updates are applied in the order in which they are added to the write batch.

Implementations

impl DBWriteBatch

pub fn new() -> Option<DBWriteBatch>

Create a new, empty write batch. Returns None if the underlying library call returns a null pointer.

pub fn put(&mut self, key: &[u8], val: &[u8])

Set the database entry for “key” to “value”. See put() on DB for more information.

pub fn clear(&mut self)

Clear all updates buffered in this write batch.

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

If the database contains the given key, erase it. Otherwise, do nothing.

pub fn iterate<'a, F, G>(&'a self, put: F, delete: G)

where F: FnMut(&'a [u8], &'a [u8]) + 'a, G: FnMut(&'a [u8]) + 'a,

Iterate over the contents of the write batch by calling callbacks for each operation in the batch.

Trait Implementations

impl Drop for DBWriteBatch

fn drop(&mut self)

Executes the destructor for this type.