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Spring 2010 Aggregate Functions Bug?
I've been trying out the aggregate functions to see how useful it will be, and I ran into an error message that concerns me.
System.Exception: field 'Subject' can not be grouped in a query call
Here's the code:
AggregateResult[] r_array = [SELECT Subject,Count(Id) FROM Task GROUP BY Subject];
for(AggregateResult r : r_array) {
System.debug(r);
}
"Some object fields have a field type that does not support grouping. You can't include fields with these field types in a GROUP BY clause. The Field object associated with DescribeSObjectResult has a groupable field that defines whether you can include the field in a GROUP BY clause."
http://www.salesforce.com/us/developer/docs/apipre/Content/sforce_api_calls_soql_select_agg_functions_field_types.htm
Not sure why that field wouldn't be groupable, but apparently it is not a bug.