Method create_relation

datafusion/sql/src/relation/mod.rs:87–113

Create a `LogicalPlan` that scans the named relation. First tries any registered extension planners. If no extension handles the relation, falls back to the default planner.

(
        &self,
        relation: TableFactor,
        planner_context: &mut PlannerContext,
    )

    /// First tries any registered extension planners. If no extension handles
    /// the relation, falls back to the default planner.
    fn create_relation(
        &self,
        relation: TableFactor,
        planner_context: &mut PlannerContext,
    ) -> Result<LogicalPlan> {
        let planned_relation =
            match self.create_extension_relation(relation, planner_context)? {
                RelationPlanning::Planned(planned) => planned,
                RelationPlanning::Original(original) => {
                    Box::new(self.create_default_relation(*original, planner_context)?)
                }
            };

        let optimized_plan = optimize_subquery_sort(
            planned_relation.plan,
            self.context_provider
                .options()
                .sql_parser
                .enable_subquery_sort_elimination,
        )?
        .data;
        if let Some(alias) = planned_relation.alias {
            self.apply_table_alias(optimized_plan, alias)
        } else {
            Ok(optimized_plan)
        }
    }

    fn create_extension_relation(
        &self,