pub struct PlanStep {
pub step: usize,
pub operation: PlanStepKind,
pub join_type: Option<String>,
pub description: String,
pub estimated_rows: Option<u64>,
pub estimation_method: Option<String>,
}Expand description
A flattened, structured EXPLAIN plan step.
Produced by QueryPlan::to_plan_steps — the
single source of truth for both the REST /query/explain step list and any
other structured consumer. The text tree (QueryPlan::to_tree) and this
step list both derive from the same PlanNode tree.
Fields§
§step: usize1-based step number in pipeline order.
operation: PlanStepKindLogical operation kind.
join_type: Option<String>Join type label (Inner/Left/…), set only for PlanStepKind::Join
so rest_operation can reproduce the {Type}Join wire string.
description: StringHuman-readable description of what the step does.
estimated_rows: Option<u64>Estimated rows produced, when known.
estimation_method: Option<String>How the row estimate was produced ("histogram", "cardinality", …).
Implementations§
Trait Implementations§
Source§impl<'de> Deserialize<'de> for PlanStep
impl<'de> Deserialize<'de> for PlanStep
Source§fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>where
__D: Deserializer<'de>,
Source§impl From<&PlanStep> for ExplainStep
Available on crate feature persistence only.
impl From<&PlanStep> for ExplainStep
persistence only.impl StructuralPartialEq for PlanStep
Auto Trait Implementations§
impl Freeze for PlanStep
impl RefUnwindSafe for PlanStep
impl Send for PlanStep
impl Sync for PlanStep
impl Unpin for PlanStep
impl UnsafeUnpin for PlanStep
impl UnwindSafe for PlanStep
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