GitHub

GROUP BY requires aggregate functions even if all expressions are already aggregated

(ksql 0.23.1) Having a GROUP BY clause in a SELECT query forces you to have at least one aggregate function in the query, even if all the expressions have been aggregated. Even though the expressions ...
GitHub

Custom Aggregate Functions fail to produce the same result as the built-in count function

I tried to implement my own count aggregate. It works well for simple queries, generating the same result as the built-in count. However, all 0s in count's output becomes NULL if used in subqueries, ...