In designer when defining a table in view model with following transformation query, bad error message is returned to user.

SELECT cust.id AS customer_id, SUM(ord.amount) AS total_amount
FROM
customers AS cust INNER JOIN orders AS ord
ON cust.id = ord.customer_id
GROUP BY cust.id;

When user forgets to write the GROUP BY clause then error with following message occurs: "ERROR:ERROR".
When I execute similar query via teeid driver then I get very useful message: "Error: Remote org.teiid.api.exception.query.QueryValidatorException: Non-constant, non-aggregate expression cust.id cannot be mixed with aggregate functions and implicit grouping."
It would be very helpful if Teiid designer gave similar message instead of the "ERROR:ERROR" one.