Method product

src/expr/src/relation.rs:1234–1245

Form the Cartesian outer-product of rows in both inputs.

(mut self, right: Self)

    /// Form the Cartesian outer-product of rows in both inputs.
    pub fn product(mut self, right: Self) -> Self {
        if right.is_constant_singleton() {
            self
        } else if self.is_constant_singleton() {
            right
        } else if let MirRelationExpr::Join { inputs, .. } = &mut self {
            inputs.push(right);
            self
        } else {
            MirRelationExpr::join(vec![self, right], vec![])
        }
    }

    /// Performs a relational equijoin among the input collections.
    ///