Struct Select 

pub struct Select { /* private fields */ }

A transform that selects specific columns from a RecordBatch.

Example

use alimentar::Select;

let select = Select::new(vec!["id", "name"]);

Implementations

impl Select

pub fn new<S: Into<String>>(columns: impl IntoIterator<Item = S>) -> Self

Creates a new Select transform for the given column names.

pub fn columns(&self) -> &[String]

Returns the columns to be selected.

Trait Implementations

impl Clone for Select

fn clone(&self) -> Select

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Select

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

Formats the value using the given formatter.

impl Transform for Select

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

Applies the transform to a RecordBatch.