Enum Transform

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

A Transform that is applied to each source column to produce a partition value.

Variants

Identity

Source value, unmodified

Bucket(u32)

Hash of value, mod N

Truncate(u32)

Value truncated to width

Year

Extract a date or timestamp year as years from 1970

Month

Extract a date or timestamp month as months from 1970-01-01

Day

Extract a date or timestamp day as days from 1970-01-01

Hour

Extract a date or timestamp hour as hours from 1970-01-01 00:00:00

Void

Always produces null

Implementations

impl Transform

pub fn serialize<__S>( __self: &Transform, __serializer: __S, ) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

impl<'de> Transform

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

where __D: Deserializer<'de>,

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 Display for Transform

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

Formats the value using the given formatter.

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 Eq for Transform

impl StructuralPartialEq for Transform