John Gallagher b189f6ba66 Change how Aggregate works when called on no rows.
Before this commit, if the aggregate function was called on 0 rows, it
would always return NULL (and never call Aggregate::init() or
finalize()). Now, init() and finalize() are always called to get the
result of the function, even if step() is never called.
2016-01-07 12:35:27 -05:00
..
2016-01-07 11:36:01 -05:00