Struct FillNull 

pub struct FillNull { /* private fields */ }

A transform that fills null values in specified columns.

Example

use alimentar::{FillNull, FillStrategy};

// Fill nulls in "age" column with 0
let fill = FillNull::new("age", FillStrategy::Zero);

// Fill nulls with a specific value
let fill = FillNull::new("score", FillStrategy::Float(0.0));

// Forward fill (use previous value)
let fill = FillNull::new("value", FillStrategy::Forward);

Implementations

impl FillNull

pub fn new<S: Into<String>>(column: S, strategy: FillStrategy) -> Self

Creates a FillNull transform for the specified column.

pub fn with_zero<S: Into<String>>(column: S) -> Self

Creates a FillNull transform that fills with zero.

pub fn column(&self) -> &str

Returns the column name.

pub fn strategy(&self) -> &FillStrategy

Returns the fill strategy.

Trait Implementations

impl Clone for FillNull

fn clone(&self) -> FillNull

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FillNull

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

Formats the value using the given formatter.

impl Transform for FillNull

fn apply(&self, batch: RecordBatch) -> Result<RecordBatch>

Applies the transform to a RecordBatch.