Enum declarative_dataflow::IndexDirection

pub enum IndexDirection {
    Forward,
    Both,
}

Attributes can be indexed in two ways, once from eid to value and the other way around. More powerful query capabilities may rely on both directions being available, whereas simple queries, such as star-joins and pull queries, might get by with just a forward index.

Variants

Forward

Forward index only.

Both

Both directions are maintained.

Trait Implementations

impl PartialEq<IndexDirection> for IndexDirection

fn eq(&self, other: &IndexDirection) -> bool

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

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Clone for IndexDirection

fn clone(&self) -> IndexDirection

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialOrd<IndexDirection> for IndexDirection

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

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

#[must_use] fn lt(&self, other: &Rhs) -> bool

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

#[must_use] fn le(&self, other: &Rhs) -> bool

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

#[must_use] fn gt(&self, other: &Rhs) -> bool

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

#[must_use] 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 Eq for IndexDirection

impl Ord for IndexDirection

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl Debug for IndexDirection

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

Formats the value using the given formatter.

impl Hash for IndexDirection

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, 

Feeds a slice of this type into the given [Hasher].

impl Serialize for IndexDirection

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

Serialize this value into the given Serde serializer.

impl<'de> Deserialize<'de> for IndexDirection

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.