Struct arrow::datatypes::Field

pub struct Field { /* fields omitted */ }

Contains the meta-data for a single relative type.

The Schema object is an ordered collection of Field objects.

Methods

impl Field

pub fn new(name: &str, data_type: DataType, nullable: bool) -> Self

Creates a new field

pub fn name(&self) -> &String

Returns an immutable reference to the Field's name

pub fn data_type(&self) -> &DataType

Returns an immutable reference to the Field's data-type

pub fn is_nullable(&self) -> bool

Indicates whether this Field supports null values

pub fn from(json: &Value) -> Result<Self>

Parse a Field definition from a JSON representation

pub fn to_json(&self) -> Value

Generate a JSON representation of the Field

pub fn to_string(&self) -> String

Converts to a String representation of the the Field

Trait Implementations

impl PartialOrd<Field> for Field

fn partial_cmp(&self, other: &Field) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Field) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Field) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Field) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Field) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialEq<Field> for Field

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Clone for Field

fn clone(&self) -> Field

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Ord for Field

fn cmp(&self, other: &Field) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Returns max if self is greater than max, and min if self is less than min. Otherwise this will return self. Panics if min > max.

impl Eq for Field

impl Display for Field

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

Formats the value using the given formatter.

impl Debug for Field

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

Formats the value using the given formatter.

impl Hash for Field

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, 

Feeds a slice of this type into the given [Hasher].

impl<'de> Deserialize<'de> for Field

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Serialize for Field

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.