Missing entrires in results of query1-0.json about cool HOT 4 CLOSED

Found the bug. It is due to incorrect dealing with time window, when birth time is determined in getUserBirthTime in the ExtendedCohortSelection class. maxDate of this class is the max date in dataset. The date range for locating birth event in the original code needs to fall in the date of the user's first record and the max date - window size. This creates a problem for tail users that have their records very close to the max date. So their ranges to find birth event are empty ranges. Now I set the range to look for birth event for one user to be from the date of its first record to the date of its last record. It can output all the users.

from cool.

I agree with the reason that causes this issue, but I do not agree to change the code because it is not the problem of the core logic. Instead, we need to add introductions about how to utilize the time window attribute.

from cool.

If we want to use the time window, it means that we only want to select users who have records for at least x days where x is defined in the time window.

from cool.

But we also need to consider the users whose last record date is earlier than the max data in the data but do not have records for continuous x days.

from cool.