You have the right idea to 'literalize' the 0 so it isn't treated as a parameter, but the syntax isn't quite right. Try:

AND consolidateID = ((0))

Then the optimizer should know that this condition will be non-selective.

You want to use the concatenate operator: ||


SELECT EventType || ';' || InitiatedAt as k, COUNT(*) as cnt
FROM HS_IHE_ATNA_Repository.Aggregation
WHERE EventType = 'LOGIN'
AND LocalDateTime > '2016-02-16 11:00:00'
GROUP BY EventType, InitiatedAt

+ is the addition operator, which implicitly treats string values as 0.