Struct ColumnarScan 

pub struct ColumnarScan<'a> { /* private fields */ }

Columnar scan over a slice of rows

Provides zero-copy access to individual columns without materializing full Row objects. This is the foundation for columnar execution.

Example

let scan = ColumnarScan::new(&rows);
let prices: Vec<&SqlValue> = scan.column(2).collect();
let quantities: Vec<&SqlValue> = scan.column(4).collect();

Implementations

impl<'a> ColumnarScan<'a>

pub fn new(rows: &'a [Row]) -> Self

Create a new columnar scan over a row slice

pub fn column(&self, index: usize) -> ColumnIterator<'a>

Get an iterator over a specific column

Returns references to SqlValues, avoiding clones. Returns None for rows that don’t have the column index.

pub fn len(&self) -> usize

Get number of rows in this scan

pub fn is_empty(&self) -> bool

Check if scan is empty

pub fn row(&self, index: usize) -> Option<&'a Row>

Get a row by index (returns reference, no clone)