Struct ColumnarMemtable 

pub struct ColumnarMemtable { /* private fields */ }

Columnar memtable with skip-list-like concurrent access

Implementations

impl ColumnarMemtable

pub fn new(schema: TableSchema, size_limit: usize) -> Self

Create a new columnar memtable

pub fn insert(&self, row_id: RowId, values: &[Option<&[u8]>]) -> Result<()>

Insert a row

values must have the same length as schema columns

pub fn get(&self, row_id: RowId) -> Option<Vec<Option<Vec<u8>>>>

Get a row by row ID (O(log N) lookup via BTreeMap) Returns all column values for the row

pub fn get_columns( &self, row_id: RowId, col_indices: &[usize], ) -> Option<Vec<Option<Vec<u8>>>>

Get specific columns for a row by row ID

pub fn scan_range( &self, start: RowId, end: RowId, ) -> Vec<(RowId, Vec<Option<Vec<u8>>>)>

Scan a range of row IDs, returning all matching rows

pub fn is_full(&self) -> bool

Check if memtable is full

pub fn row_count(&self) -> u64

Get row count

pub fn memory_bytes(&self) -> usize

Get memory usage

pub fn schema(&self) -> &TableSchema

Get schema

Trait Implementations

impl Debug for ColumnarMemtable

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.