Struct Field 

pub struct Field {
    pub id: i32,
    pub name: String,
    pub required: bool,
    pub field_type: Type,
    pub doc: Option<String>,
    pub default: Option<Value>,
}

A field in a schema.

Fields are identified by their id, which is immutable and unique within a table’s history. This enables safe schema evolution where fields can be renamed without breaking existing data files.

Fields

id: i32

Unique, immutable identifier for this field. IDs are never reused, even for dropped fields.

name: String

The field name. Can be changed during schema evolution.

required: bool

Whether the field is required (non-nullable).

field_type: Type

The data type of this field.

doc: Option<String>

Optional documentation for this field.

default: Option<Value>

Optional default value (JSON-encoded).

Implementations

impl Field

pub fn to_arrow_field(&self) -> Field

Converts this field to an Arrow field.

Trait Implementations

impl Clone for Field

fn clone(&self) -> Field

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Field

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

Formats the value using the given formatter.

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 PartialEq for Field

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

impl StructuralPartialEq for Field