Enum Nullability 

pub enum Nullability {
    NullFirst,
    NullSecond,
}

Avro types are not nullable, with nullability instead encoded as a union where one of the variants is the null type.

To accommodate this we special case two-variant unions where one of the variants is the null type, and use this to derive arrow’s notion of nullability

Variants

NullFirst

The nulls are encoded as the first union variant

NullSecond

The nulls are encoded as the second union variant

Trait Implementations

impl Clone for Nullability

fn clone(&self) -> Nullability

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nullability

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

Formats the value using the given formatter.

impl PartialEq for Nullability

fn eq(&self, other: &Nullability) -> 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 Copy for Nullability

impl StructuralPartialEq for Nullability