Method as_explain_single_plan

src/expr/src/explain.rs:197–213

(
        &'a mut self,
        context: &'a ExplainContext<'a>,
    )

impl<'a> MirRelationExpr {
    fn as_explain_single_plan(
        &'a mut self,
        context: &'a ExplainContext<'a>,
    ) -> Result<ExplainSinglePlan<'a, MirRelationExpr>, ExplainError> {
        // normalize the representation as linear chains
        // (this implies !context.config.raw_plans by construction)
        if context.config.linear_chains {
            enforce_linear_chains(self)?;
        };

        let plan = AnnotatedPlan {
            plan: self,
            annotations: BTreeMap::default(),
        };

        Ok(ExplainSinglePlan { context, plan })
    }
}

/// Normalize the way inputs of multi-input variants are rendered.