Interval math causes error

[DanCory]

Use the sample data and view from the readme

SEMANTIC SELECT
    year,
    region,
    AGGREGATE(revenue) AS revenue,
    AGGREGATE(revenue) AT (ALL region) AS year_total,
    AGGREGATE(revenue) / AGGREGATE(revenue) AT (ALL region) AS pct_of_year
FROM sales_v
where make_date(year,1,1) between '2023-01-01' and '2023-01-01' + interval '30' days;

causes error:

Invalid Input Error:
Query error: Parser Error: syntax error at or near "_inner"

LINE 4: ...,1,1) between '2023-01-01' and '2023-01-01' + interval '30' _inner.days) AS revenue,
                                                                       ^

LINE 4: ...,1,1) between '2023-01-01' and '2023-01-01' + interval '30' _inner.days) AS revenue,
                                                                       ^

LINE 1: SEMANTIC SELECT