Enum parity_db::Operation

pub enum Operation<Key, Value> {
    Set(Key, Value),
    Dereference(Key),
    Reference(Key),
}

Different operations allowed for a commit. Behavior may differs depending on column configuration.

Variants

Set(Key, Value)

Insert or update the value for a given key.

Dereference(Key)

Dereference at a given key, resulting in either removal of a key value or decrement of its reference count counter.

Reference(Key)

Increment the reference count counter of an existing value for a given key. If no value exists for the key, this operation is skipped.

Implementations

impl<Key, Value> Operation<Key, Value>

pub fn key(&self) -> &Key

pub fn into_key(self) -> Key

pub fn is_reference_ops(&self) -> bool

impl<K: AsRef<[u8]>, Value> Operation<K, Value>

pub fn to_key_vec(self) -> Operation<Vec<u8>, Value>

Trait Implementations

impl<Key: Ord, Value: Eq> Ord for Operation<Key, Value>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere
    Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere
    Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl<Key: PartialEq, Value: PartialEq> PartialEq<Operation<Key, Value>> for Operation<Key, Value>

fn eq(&self, other: &Operation<Key, Value>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Key: Ord, Value: Eq> PartialOrd<Operation<Key, Value>> for Operation<Key, Value>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl<Key: Eq, Value: Eq> Eq for Operation<Key, Value>

impl<Key, Value> StructuralEq for Operation<Key, Value>

impl<Key, Value> StructuralPartialEq for Operation<Key, Value>