Method plan_divide

src/sql/src/plan/transform_ast.rs:105–112

Divides `lhs` by `rhs` but replaces division-by-zero errors with NULL; note that this is semantically equivalent to `NULLIF(rhs, 0)`.

(lhs: Expr<Aug>, rhs: Expr<Aug>)

    // Divides `lhs` by `rhs` but replaces division-by-zero errors with NULL;
    // note that this is semantically equivalent to `NULLIF(rhs, 0)`.
    fn plan_divide(lhs: Expr<Aug>, rhs: Expr<Aug>) -> Expr<Aug> {
        lhs.divide(Expr::Case {
            operand: None,
            conditions: vec![rhs.clone().equals(Expr::number("0"))],
            results: vec![Expr::null()],
            else_result: Some(Box::new(rhs)),
        })
    }

    fn plan_agg(
        &mut self,