Struct QueryExplainer 

pub struct QueryExplainer { /* private fields */ }

Renders a QueryPlan in the requested ExplainFormat.

use oxirs_arq::explain::{QueryExplainer, ExplainFormat, QueryPlan, PlanNode, IndexType};

let plan = QueryPlan {
    root: PlanNode::TripleScan {
        pattern: "?s ?p ?o".into(),
        index_used: IndexType::FullScan,
        estimated_rows: 100_000,
    },
    estimated_cost: 12.5,
    estimated_cardinality: 100_000,
};
let exp = QueryExplainer::builder().show_estimates(true).build();
let out = exp.explain_with_format(&plan, ExplainFormat::Json);
assert!(out.contains("\"type\""));

Implementations

impl QueryExplainer

pub fn new() -> Self

Create a new explainer with default settings (text format, all annotations shown).

pub fn builder() -> QueryExplainerBuilder

Return a builder for fine-grained configuration.

pub fn explain(&self, plan: &QueryPlan) -> String

Render the plan using the format configured at construction time.

pub fn explain_with_format( &self, plan: &QueryPlan, format: ExplainFormat, ) -> String

Render the plan in a specific format, overriding the configured default.

pub fn explain_text(&self, plan: &QueryPlan) -> String

Render as an indented text tree.

pub fn explain_json(&self, plan: &QueryPlan) -> String

Render as a JSON object.

pub fn explain_dot(&self, plan: &QueryPlan) -> String

Render as Graphviz DOT language.

Trait Implementations

impl Clone for QueryExplainer

fn clone(&self) -> QueryExplainer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryExplainer

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

Formats the value using the given formatter.

impl Default for QueryExplainer

fn default() -> Self

Returns the “default value” for a type.