Struct mz_adapter::explain::insights::PlanInsights

pub struct PlanInsights {
    pub imports: BTreeMap<String, ImportInsights>,
    pub fast_path_clusters: BTreeMap<String, Option<FastPathCluster>>,
    pub fast_path_limit: Option<usize>,
    pub persist_count: Vec<Name>,
}

Insights about an optimized plan.

Fields

imports: BTreeMap<String, ImportInsights>

Collections imported by the plan.

Each key is the ID of an imported collection, and each value contains further insights about each collection and how it is used by the plan.

fast_path_clusters: BTreeMap<String, Option<FastPathCluster>>

If this plan is not fast path, this is the map of cluster names to indexes that would render this as fast path. That is: if this query were run on the cluster of the key, it would be fast because it would use the index of the value.

fast_path_limit: Option<usize>

For the current cluster, whether adding a LIMIT <= this will result in a fast path.

persist_count: Vec<Name>

Names of persist sources over which a count(*) is done.

Implementations

impl PlanInsights

pub async fn compute_fast_path_clusters( &mut self, humanizer: &dyn ExprHumanizer, ctx: Box<PlanInsightsContext>, )

Trait Implementations

impl Clone for PlanInsights

fn clone(&self) -> PlanInsights

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PlanInsights

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

Formats the value using the given formatter.

impl Default for PlanInsights

fn default() -> PlanInsights

Returns the “default value” for a type.

impl Serialize for PlanInsights

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

where __S: Serializer,

Serialize this value into the given Serde serializer.