Struct SourceCapabilities 

pub struct SourceCapabilities {
    pub exact_len: bool,
    pub exact_weighted_total: bool,
    pub random_access: bool,
    pub deterministic_partitioning: bool,
    pub predicate_pushdown: bool,
    pub projection_pushdown: bool,
    pub streaming: bool,
}

Optional performance and planning capabilities of an EventSource.

Fields

exact_len: bool

Exact event count is available cheaply.

exact_weighted_total: bool

Exact weighted total is available cheaply.

random_access: bool

Arbitrary row ranges can be read.

deterministic_partitioning: bool

Distributed row assignment is deterministic.

predicate_pushdown: bool

Filters can be pushed into the source.

projection_pushdown: bool

Column projection can be pushed into the source.

streaming: bool

Batches can be streamed without full materialization.

Trait Implementations

impl Clone for SourceCapabilities

fn clone(&self) -> SourceCapabilities

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SourceCapabilities

impl Debug for SourceCapabilities

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

Formats the value using the given formatter.

impl Default for SourceCapabilities

fn default() -> SourceCapabilities

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SourceCapabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SourceCapabilities

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

where __S: Serializer,

Serialize this value into the given Serde serializer.