Struct ckb_db::write_batch::RocksDBWriteBatch

pub struct RocksDBWriteBatch { /* fields omitted */ }

An atomic batch of write operations.

Making an atomic commit of several write operations.

Implementations

impl RocksDBWriteBatch

pub fn len(&self) -> usize

Return the count of write batch.

pub fn size_in_bytes(&self) -> usize

Return WriteBatch serialized size (in bytes).

pub fn is_empty(&self) -> bool

Returns true if the write batch contains no operations.

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

Write the bytes into the given column with associated key.

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

Delete the data associated with the given key and given column.

pub fn delete_range<K: AsRef<[u8]>>(
    &mut self,
    col: Col,
    range: impl Iterator<Item = K>
) -> Result<()>

Remove database entries from start key to end key.

Removes the database entries in the range [“begin_key”, “end_key”), i.e., including “begin_key” and excluding “end_key”. It is not an error if no keys exist in the range [“begin_key”, “end_key”).

pub fn clear(&mut self) -> Result<()>

Clear all updates buffered in this batch.