Struct declarative_dataflow::AttributeConfig

pub struct AttributeConfig {
    pub input_semantics: InputSemantics,
    pub trace_slack: Option<Time>,
    pub index_direction: IndexDirection,
    pub query_support: QuerySupport,
    pub timeless: bool,
}

Per-attribute semantics.

Fields

input_semantics: InputSemantics

Modifiers to apply on attribute inputs, such as keeping only the most recent value per eid, or compare-and-swap.

trace_slack: Option<Time>

How close indexed traces should follow the computation frontier.

index_direction: IndexDirection

Index directions to maintain for this attribute.

query_support: QuerySupport

Query capabilities supported by this attribute.

timeless: bool

Does this attribute care about its respective time dimension? Timeless attributes do not have an influence on the overall progress in the system.

Methods

impl AttributeConfig

pub fn tx_time(input_semantics: InputSemantics) -> Self

Shortcut to specifying an attribute that will live in some transaction time domain and always compact up to the computation frontier.

pub fn real_time(input_semantics: InputSemantics) -> Self

Shortcut to specifying an attribute that will live in some real-time domain and always compact up to the computation frontier.

pub fn uncompacted(input_semantics: InputSemantics) -> Self

Shortcut to specifying an attribute that will live in an arbitrary time domain and never compact its trace.

Trait Implementations

impl Default for AttributeConfig

fn default() -> Self

Returns the "default value" for a type.

impl PartialEq<AttributeConfig> for AttributeConfig

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

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

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

This method tests for !=.

impl Clone for AttributeConfig

fn clone(&self) -> AttributeConfig

Returns a copy of the value.

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

Performs copy-assignment from source.

impl PartialOrd<AttributeConfig> for AttributeConfig

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

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

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

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

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

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

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

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

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

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

impl Ord for AttributeConfig

fn cmp(&self, other: &AttributeConfig) -> 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 Eq for AttributeConfig

impl Hash for AttributeConfig

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 Debug for AttributeConfig

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

Formats the value using the given formatter.

impl Serialize for AttributeConfig

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 AttributeConfig

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

Deserialize this value from the given Serde deserializer.