Enum Transform 

pub enum Transform {
    Identity,
    Bucket(u32),
    Truncate(u32),
    Year,
    Month,
    Day,
    Hour,
    Void,
}

Supported partition transforms.

Variants

Identity

Use the value as-is.

Bucket(u32)

Hash implementation (murmur3 32-bit recommended) % N.

Truncate(u32)

Truncate to width W.

Year

Extract year from date/timestamp.

Month

Extract month from date/timestamp.

Day

Extract day from date/timestamp.

Hour

Extract hour from timestamp.

Void

Always null (used for evolution when dropping a partition field).

Implementations

impl Transform

pub fn can_apply_to(&self, _type: &Type) -> bool

Returns true if this transform can be applied to the given type.

pub fn result_type(&self, source_type: &Type) -> Type

Returns the result type of the transform.

Trait Implementations

impl Clone for Transform

fn clone(&self) -> Transform

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Transform

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Transform

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Transform

fn eq(&self, other: &Transform) -> 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 Transform

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Transform

impl Eq for Transform

impl StructuralPartialEq for Transform