Function test_transform_explain

datafusion/expr/src/logical_plan/plan.rs:5181–5219

()

    #[test]
    fn test_transform_explain() {
        let schema = Schema::new(vec![
            Field::new("foo", DataType::Int32, false),
            Field::new("bar", DataType::Int32, false),
        ]);

        let plan = table_scan(TableReference::none(), &schema, None)
            .unwrap()
            .explain(false, false)
            .unwrap()
            .build()
            .unwrap();

        let external_filter = col("foo").eq(lit(true));

        // after transformation, because plan is not the same anymore,
        // the parent plan is built again with call to LogicalPlan::with_new_inputs -> with_new_exprs
        let plan = plan
            .transform(|plan| match plan {
                LogicalPlan::TableScan(table) => {
                    let filter = Filter::try_new(
                        external_filter.clone(),
                        Arc::new(LogicalPlan::TableScan(table)),
                    )
                    .unwrap();
                    Ok(Transformed::yes(LogicalPlan::Filter(filter)))
                }
                x => Ok(Transformed::no(x)),
            })
            .data()
            .unwrap();

        let actual = format!("{}", plan.display_indent());
        assert_snapshot!(actual, @r"
        Explain
          Filter: foo = Boolean(true)
            TableScan: ?table?
        ")
    }

    #[test]
    fn test_plan_partial_ord() {