Struct ColumnStore 

pub struct ColumnStore { /* private fields */ }

Column store for high-performance filtering.

Implementations

impl ColumnStore

pub fn new() -> Self

Creates a new empty column store.

pub fn with_schema(fields: &[(&str, ColumnType)]) -> Self

Creates a column store with pre-defined indexed fields.

Arguments

• fields - List of (field_name, field_type) tuples

pub fn add_column(&mut self, name: &str, col_type: ColumnType)

Adds a new column to the store.

pub fn row_count(&self) -> usize

Returns the number of rows in the store.

pub fn string_table(&self) -> &StringTable

Returns the string table for string interning.

pub fn string_table_mut(&mut self) -> &mut StringTable

Returns a mutable reference to the string table.

pub fn push_row(&mut self, values: &[(&str, ColumnValue)])

Pushes values for a new row.

Missing fields will be set to null.

pub fn get_column(&self, name: &str) -> Option<&TypedColumn>

Gets a column by name.

pub fn filter_eq_int(&self, column: &str, value: i64) -> Vec<usize>

Filters rows by equality on an integer column.

Returns a vector of row indices that match.

pub fn filter_eq_string(&self, column: &str, value: &str) -> Vec<usize>

Filters rows by equality on a string column.

Returns a vector of row indices that match.

pub fn filter_gt_int(&self, column: &str, threshold: i64) -> Vec<usize>

Filters rows by range on an integer column (value > threshold).

Returns a vector of row indices that match.

pub fn filter_lt_int(&self, column: &str, threshold: i64) -> Vec<usize>

Filters rows by range on an integer column (value < threshold).

pub fn filter_range_int(&self, column: &str, low: i64, high: i64) -> Vec<usize>

Filters rows by range on an integer column (low < value < high).

pub fn filter_in_string(&self, column: &str, values: &[&str]) -> Vec<usize>

Filters rows by IN clause on a string column.

Returns a vector of row indices that match any of the values.

pub fn count_eq_int(&self, column: &str, value: i64) -> usize

Counts rows matching equality on an integer column.

More efficient than filter_eq_int().len() as it doesn’t allocate.

pub fn count_eq_string(&self, column: &str, value: &str) -> usize

Counts rows matching equality on a string column.

pub fn filter_eq_int_bitmap(&self, column: &str, value: i64) -> RoaringBitmap

Filters rows by equality on an integer column, returning a bitmap.

Uses RoaringBitmap for memory-efficient storage of matching indices. Useful for combining multiple filters with AND/OR operations.

pub fn filter_eq_string_bitmap( &self, column: &str, value: &str, ) -> RoaringBitmap

Filters rows by equality on a string column, returning a bitmap.

pub fn filter_range_int_bitmap( &self, column: &str, low: i64, high: i64, ) -> RoaringBitmap

Filters rows by range on an integer column, returning a bitmap.

pub fn bitmap_and(a: &RoaringBitmap, b: &RoaringBitmap) -> RoaringBitmap

Combines two filter results using AND.

Returns indices that are in both bitmaps.

pub fn bitmap_or(a: &RoaringBitmap, b: &RoaringBitmap) -> RoaringBitmap

Combines two filter results using OR.

Returns indices that are in either bitmap.

Trait Implementations

impl Debug for ColumnStore

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

Formats the value using the given formatter.

impl Default for ColumnStore

fn default() -> ColumnStore

Returns the “default value” for a type.