Enum UniqueKeepStrategy

pub enum UniqueKeepStrategy {
    First,
    Last,
    None,
    Any,
}

Variants

First

Keep the first unique row.

Last

Keep the last unique row.

None

Keep None of the unique rows.

Any

Keep any of the unique rows This allows more optimizations

Trait Implementations

impl Clone for UniqueKeepStrategy

fn clone(&self) -> UniqueKeepStrategy

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for UniqueKeepStrategy

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

Formats the value using the given formatter.

impl Default for UniqueKeepStrategy

fn default() -> UniqueKeepStrategy

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for UniqueKeepStrategy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'_derivative_strum> From<&'_derivative_strum UniqueKeepStrategy> for &'static str

fn from(x: &'_derivative_strum UniqueKeepStrategy) -> &'static str

Converts to this type from the input type.

impl From<UniqueKeepStrategy> for &'static str

fn from(x: UniqueKeepStrategy) -> &'static str

Converts to this type from the input type.

impl Hash for UniqueKeepStrategy

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for UniqueKeepStrategy

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

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 UniqueKeepStrategy

impl Eq for UniqueKeepStrategy

impl StructuralPartialEq for UniqueKeepStrategy