Struct ColumnSchema 

pub struct ColumnSchema {
    pub name: String,
    pub inferred_type: InferredType,
    pub format_category: FormatCategory,
    pub null_count: usize,
    pub unique_count: usize,
    pub unique_capped: bool,
    pub cardinality: Cardinality,
    pub sample_values: Vec<String>,
}

Fields

name: String

inferred_type: InferredType

format_category: FormatCategory

First-non-empty-cell number-format category. Drives whether the column is “dollars” vs “percent” vs “plain integer” — orthogonal to inferred_type (a currency column is still typed Float).

null_count: usize

unique_count: usize

Distinct rendered-value count, capped at 10 000.

unique_capped: bool

cardinality: Cardinality

sample_values: Vec<String>

Up to 3 distinct rendered values. Order is whatever the column presented first; not stable across runs if the underlying sheet changes. Useful for grounding agent queries with concrete values.

Trait Implementations

impl Clone for ColumnSchema

fn clone(&self) -> ColumnSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnSchema

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

Formats the value using the given formatter.