Struct ColumnarBatch 

pub struct ColumnarBatch { /* private fields */ }

Column-major accumulation of a full relation (one BatchColumn per output column), used by blocking operators below the spill boundary.

Implementations

impl ColumnarBatch

pub fn new(num_columns: usize) -> Self

Create an empty batch with num_columns columns.

pub fn num_columns(&self) -> usize

pub fn num_rows(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn column(&self, idx: usize) -> &BatchColumn

pub fn append_chunk(&mut self, chunk: &DataChunk) -> usize

Append all visible rows of chunk.

Each column takes its raw kind from the chunk’s typed layout; a kind mismatch (or a fallback chunk column) degrades that column to BatchColumn::Fallback with the accumulated rows preserved.

pub fn append_chunk_row(&mut self, chunk: &DataChunk, idx: usize)

Append a single visible row of chunk at idx.

Keeps the raw typed fast path per column (same degradation rules as Self::append_chunk); used by operators that account memory per appended row before buffering.

pub fn append_row(&mut self, row: &[Value])

Append a single row of values (fallback path).

pub fn to_rows(&self) -> Vec<Vec<Value>>

Materialize rows (row-major) from the current columnar state.

pub fn compare_rows_at(&self, col: usize, a: usize, b: usize) -> Ordering

Compare rows a and b on column col (raw fast path when typed).

pub fn compare_value_at(&self, col: usize, v: &Value, idx: usize) -> Ordering

Compare the value v against row idx on column col.

pub fn permute(&mut self, perm: &[usize])

Reorder rows by perm (result[i] = old[perm[i]]).

pub fn truncate(&mut self, len: usize)

Keep only the first len rows (columns must already be in the desired order).

pub fn clear(&mut self)

Drop all accumulated rows.

pub fn estimated_size(&self) -> usize

Estimated heap bytes (for memory accounting).

Trait Implementations

impl Clone for ColumnarBatch

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnarBatch

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

Formats the value using the given formatter.

impl Default for ColumnarBatch

fn default() -> Self

Returns the “default value” for a type.