Struct SourcePlan 

pub struct SourcePlan {
    pub source: SourceName,
    pub kind: String,
    pub pushed_down: Vec<Predicate>,
    pub applied_locally: Vec<Predicate>,
    pub emulated: Vec<Predicate>,
    pub unavailable: Vec<Predicate>,
    pub pages_fetched: u32,
}

What one source was asked for, and what happened to each predicate.

Fields

source: SourceName

The configured source this describes.

kind: String

The plugin kind behind it.

pushed_down: Vec<Predicate>

Predicates the source applied itself.

The four predicate vectors below partition one set of outcomes, and nothing in the type says so: a Predicate could appear in two of them at once, or in none. One Vec<(Predicate, Outcome)> — or a map keyed by predicate — would make that unrepresentable. See the directive below for why it stays as it is.

applied_locally: Vec<Predicate>

Predicates the engine applied in memory over a wider result set.

emulated: Vec<Predicate>

Predicates the engine answered by a bounded scan of the source.

unavailable: Vec<Predicate>

Predicates neither side could answer, so the result is unconstrained.

Never Predicate::ReverseDependencies: DependencySupport has no unsupported variant, so a reverse-dependency read is answered natively or emulated by the engine’s bounded scan, never abandoned. The type cannot say so — see the directive below.

pages_fetched: u32

How many pages the engine pulled from this source to answer.

Trait Implementations

impl Clone for SourcePlan

fn clone(&self) -> SourcePlan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourcePlan

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SourcePlan

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for SourcePlan

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for SourcePlan

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SourcePlan

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SourcePlan