Struct Selector 

pub struct Selector(/* private fields */);

A parsed selector expression that can be executed against Arrow arrays.

Implementations

impl Selector

pub fn execute_per_row(&self, source: &ListArray) -> Result<ListArray, Error>

Execute this selector against each row of a ListArray.

Performs implicit iteration over the inner list array, and reconstructs the array at the end.

[.[].poses[].x] is the actual query, we only require writing the .poses[].x portion.

Trait Implementations

impl Clone for Selector

fn clone(&self) -> Selector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Selector

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

Formats the value using the given formatter.

impl Display for Selector

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

Formats the value using the given formatter.

impl FromStr for Selector

type Err = Error

The associated error which can be returned from parsing.

fn from_str(query: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Selector

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Selector

fn eq(&self, other: &Selector) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Transform for &Selector

type Source = GenericListArray<i32>

The source array type.

type Target = GenericListArray<i32>

The target array type.

fn transform(&self, source: &Self::Source) -> Result<Self::Target, Error>

Apply the transformation to the source array.

fn then<T2>(self, next: T2) -> Compose<Self, T2>

where Self: Sized, T2: Transform<Source = Self::Target>,

Chain this transformation with another transformation.

impl Transform for Selector

type Source = GenericListArray<i32>

The source array type.

type Target = GenericListArray<i32>

The target array type.

fn transform(&self, source: &Self::Source) -> Result<Self::Target, Error>

Apply the transformation to the source array.

fn then<T2>(self, next: T2) -> Compose<Self, T2>

where Self: Sized, T2: Transform<Source = Self::Target>,

Chain this transformation with another transformation.

impl Eq for Selector

impl StructuralPartialEq for Selector