Enum ColumnData 

pub enum ColumnData {
    Int32(Vec<Option<i32>>),
    Int64(Vec<Option<i64>>),
    Float32(Vec<Option<f32>>),
    Float64(Vec<Option<f64>>),
    Boolean(Vec<Option<bool>>),
    Utf8(Vec<Option<String>>),
}

A single column’s data from a Parquet file.

Nullable values are wrapped in Option; None represents a null.

Variants

Int32(Vec<Option<i32>>)

32-bit signed integer column

Int64(Vec<Option<i64>>)

64-bit signed integer column

Float32(Vec<Option<f32>>)

32-bit IEEE-754 float column

Float64(Vec<Option<f64>>)

64-bit IEEE-754 float column

Boolean(Vec<Option<bool>>)

Boolean column

Utf8(Vec<Option<String>>)

UTF-8 string column

Implementations

impl ColumnData

pub fn len(&self) -> usize

Number of rows (including nulls) in this column.

pub fn is_empty(&self) -> bool

Returns true if this column contains no rows.

pub fn is_numeric(&self) -> bool

Returns true if this column holds numeric data (Int32/Int64/Float32/Float64).

pub fn to_f64_vec(&self) -> Option<Vec<f64>>

Cast each non-null value to f64; nulls become f64::NAN.

Trait Implementations

impl Clone for ColumnData

fn clone(&self) -> ColumnData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnData

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

Formats the value using the given formatter.