Hi,
A few weeks ago we encountered an issue with monetdb when summing nulls, grouped by some column. We managed to create a simple test case which reproduces this scenario:
create table test (number int, name varchar(50));
insert into test values(1,'jonh'); insert into test values(2,'mike'); insert into test values(3,'mary'); insert into test values(null,'austin'); insert into test values(null,'jonh'); insert into test values(null,'mary');
select name, sum(number) from test group by name;
The result of this query is:
austin | 0 jonh | 1 mary | 3 mike | 2
But the expected result is:
austin | null jonh | 1 mary | 3 mike | 2
The version that we are using is Feb2013-SP5.
We found a bug report that could be related to this one, but we are not sure: http://bugs.monetdb.org/show_bug.cgi?id=3388
Should we open a new issue for this one?
Thank you, Pedro Salgueiro