Struct thetadb::CursorTx

pub struct CursorTx<'a>(/* private fields */);

Represents a cursor for navigating through the ThetaDB.

Implementations

impl<'a> CursorTx<'a>

pub fn new(db: &'a ThetaDB) -> Result<Self>

Start a cursor transaction.

pub fn key(&self) -> Result<Option<Vec<u8>>>

Gets the key of the current record pointed by the cursor.

pub fn value(&self) -> Result<Option<Vec<u8>>>

Gets the value of the current record pointed by the cursor.

pub fn key_value(&self) -> Result<Option<(Vec<u8>, Vec<u8>)>>

Gets the key-value pair of the current record pointed by the cursor.

pub fn first(&mut self) -> Result<bool>

Moves the cursor to the first record.

pub fn last(&mut self) -> Result<bool>

Moves the cursor to the last record.

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

Moves the cursor to the specific record with the given key.

pub fn next(&mut self) -> Result<bool>

Moves the cursor to the next record.

pub fn prev(&mut self) -> Result<bool>

Moves the cursor to the previous record.