Method display_indent_schema

datafusion/expr/src/logical_plan/plan.rs:1733–1748

Return a `format`able structure that produces a single line per node that includes the output schema. For example: ```text Projection: employee.id [id:Int32]\ Filter: employee.state = Utf8(\"CO\") [id:Int32, state:Utf8]\ TableScan: employee projection=[0, 3] [id:Int32, state:Utf8]"; ``` ``` use arrow::datatypes::{DataType, Field, Schema}; use datafusion_expr::{col, lit, logical_plan::table_scan,

(&self)

    /// );
    /// ```
    pub fn display_indent_schema(&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 = true;
                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 displayable structure that produces plan in postgresql JSON format.
    ///