Struct ColumnStats 

pub struct ColumnStats {
    pub null_count: u64,
    pub min_i128: Option<i128>,
    pub max_i128: Option<i128>,
    pub min_f64: Option<f64>,
    pub max_f64: Option<f64>,
    pub sample_values: Vec<String>,
}

Per-column diagnostics returned alongside the inferred schema.

Fields

null_count: u64

min_i128: Option<i128>

Minimum observed integer value for numeric columns (as i128 to cover anything the widen pass will accept). None for non-numeric columns or columns that only ever contained floats / NULLs.

max_i128: Option<i128>

min_f64: Option<f64>

Minimum / maximum observed floating-point value. Populated for DOUBLE PRECISION columns and integer columns that saw a decimal value.

max_f64: Option<f64>

sample_values: Vec<String>

Up to sample_rows raw string values from the beginning of the file.

Trait Implementations

impl Clone for ColumnStats

fn clone(&self) -> ColumnStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnStats

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

Formats the value using the given formatter.

impl Default for ColumnStats

fn default() -> ColumnStats

Returns the “default value” for a type.