Method num_inputs

src/expr/src/relation.rs:1059–1065

The number of child relations this relation has.

(&self)

    /// The number of child relations this relation has.
    pub fn num_inputs(&self) -> usize {
        let mut count = 0;

        self.visit_children(|_| count += 1);

        count
    }

    /// Constructs a constant collection from specific rows and schema, where
    /// each row will have a multiplicity of one.