Search found 4 matches
- Tue Mar 01, 2016 6:33 pm
- Forum: Report a Bug
- Topic: SUM on user-defined type
- Replies: 3
- Views: 10416
Re: SUM on user-defined type
Lol, sure. But what if it makes sense to consider that WEIGHT + WEIGHT -> WEIGHT and I want to have SUM working out of the box?
- Mon Feb 29, 2016 8:03 am
- Forum: Report a Bug
- Topic: SUM on user-defined type
- Replies: 3
- Views: 10416
SUM on user-defined type
Hi! I'm just trying to get SUM(PARTS, WEIGHT) working with WEIGHT being "TYPE WEIGHT POSSREP {WEIGHT RATIONAL};" I end up with ERROR: RS0055: Could not find operator SUM(RELATION {PID P#, NAME NAME, COLOR COLOR, WEIGHT WEIGHT, CITY CHARACTER, %attributeName5 WEIGHT}, INTEGER) I've tried de...
- Sat Feb 01, 2014 9:14 am
- Forum: Report a Bug
- Topic: Shouldn't JOIN { } return DEE ?
- Replies: 5
- Views: 10993
Re: Shouldn't JOIN { } return DEE ?
Interresting. Thanks for the explanation. For the record, I was actually reading Hugh's book because I use it, and Rel, with the students at the University of Louvain. The example, and expectation, comes from what's written in the book. In that context, I would certainly say that it's a violation of...
- Thu Jan 30, 2014 5:03 pm
- Forum: Report a Bug
- Topic: Shouldn't JOIN { } return DEE ?
- Replies: 5
- Views: 10993
Shouldn't JOIN { } return DEE ?
It seems that it returns a single TUPLE{} for now.
Also JOIN{} = DEE returns the following error: ERROR: Operator 'OP_EQUALS(TUPLE {}, RELATION {}) RETURNS BOOLEAN' has not been defined.
Am I misunderstanding something here?
Also JOIN{} = DEE returns the following error: ERROR: Operator 'OP_EQUALS(TUPLE {}, RELATION {}) RETURNS BOOLEAN' has not been defined.
Am I misunderstanding something here?