Struct Columns 

pub struct Columns { /* private fields */ }

Dense typed columns keyed by field name (only fully-typed, NaN-free fields).

Implementations

impl Columns

pub fn build(items: &[Value]) -> Self

Build typed columns from items. A field qualifies only if it is the same scalar variant (Int/Float/Str) in every row — floats must also be non-NaN. The first row seeds the candidate type per field.

pub fn filter( &self, field: &str, op: FilterOp, value: &Value, ) -> Option<Vec<usize>>

Fast filter for a single comparison/equality op on a typed column, or None when this path does not apply (unknown field, unsupported operator, or a value whose coercion can’t be proven equal to the row engine). Returns matching indices in ascending order — identical to crate::filter::filter_indices.

pub fn sort_subset( &self, order: &[usize], keys: &[(&str, SortDirection)], limit: Option<usize>, ) -> Option<Vec<usize>>

Sort an existing index list by one or more typed-column keys, preserving relative order for equal keys (stable). Returns None unless every key is a typed column. Keys are applied highest-priority first (matching crate::sort::sort_indices); typed columns have no nulls, so null placement is irrelevant. limit keeps only the first k rows (a top-k partial sort) — the page window — instead of fully ordering the whole subset; None sorts all.