select item check issue for aggregate queries

[rupal-bq]

For queries with HAVING clause only (without GROUP BY), the select list fails to handle functions applied to literal (it only allows literal in this case which is wrong)

Query:

SELECT (TO_DAYS(DATE('2050-01-01')) - 693961)
FROM `calcs`
HAVING (COUNT(1) > 0)

Error message:

"Explicit GROUP BY clause is required because expression [-(TO_DAYS(DATE(2050-01-01)), 693961)] contains non- aggregated column"