Method display_indent

datafusion/expr/src/logical_plan/plan.rs:1687–1702

Return a `format`able structure that produces a single line per node. # Example ```text Projection: employee.id Filter: employee.state Eq Utf8(\"CO\")\ CsvScan: employee projection=Some([0, 3]) ``` ``` use arrow::datatypes::{DataType, Field, Schema}; use datafusion_expr::{col, lit, logical_plan::table_scan, LogicalPlanBuilder}; let schema = Schema::new(vec![Field::new("id", DataType::Int32, fal

(&self)

    /// assert_eq!("Filter: t1.id = Int32(5)\n  TableScan: t1", display_string);
    /// ```
    pub fn display_indent(&self) -> impl Display + '_ {
        // Boilerplate structure to wrap LogicalPlan with something
        // that that can be formatted
        struct Wrapper<'a>(&'a LogicalPlan);
        impl Display for Wrapper<'_> {
            fn fmt(&self, f: &mut Formatter) -> fmt::Result {
                let with_schema = false;
                let mut visitor = IndentVisitor::new(f, with_schema);
                match self.0.visit_with_subqueries(&mut visitor) {
                    Ok(_) => Ok(()),
                    Err(_) => Err(fmt::Error),
                }
            }
        }
        Wrapper(self)
    }

    /// Return a `format`able structure that produces a single line
    /// per node that includes the output schema. For example: