Question
TCS
IN
Last activity: 17 Jul 2019 1:26 EDT
Difference between Class Join and Associations under Data Access Tab in Report Definition.
Both Class Join and Associations are used to join multiple classes in RD.
What is the basic difference between them to support reporting?
***Edited by Moderator Marissa to update platform capability tags****
Ordina
NL
Hi,
Well a class join, defined in a report is really as a definition tied to that one report and therefore not reusable in other reports. Association rules on the other hand are seperate rules which can be reused throughout all reports in your pega environment. Take a look at some of the Association rules pega provides out of the box.
regards,
leo
TCS
IN
Thanks Leo for your reply.
I understand that Association is a rule and is an instance of Rule-Obj-Association and it can be reused in other reports.
But, it also uses the class join feature to define a relationship between two classes based on matching values in pairs of properties.
My question is bit specific now.
When to use Class Join and and when Association in a report? Can you please give one example of Association rule used in Report Definition?
Why shall I create an Association Rule if a relationship between multiple classes can be achieved through Class Join feature in report definition only?Moreover, extra rule increases our task of maintainability.
Please reply.
Knowledge Expert
FR
If you can reuse such relationship in multiple RD - you should consider use of Association Rule. It will increase maintainability. Especially in situations when RD rule is delegated to business users that have no idea about classes, joins etc, but know about business terms like Association
Pegasystems Inc.
US
Hello,
Have you gone through the below discussions related to this topic,
https://collaborate.pega.com/question/difference-between-joins-and-association-report-definaton
Hope this discussions might give you more information.
Regards
Mahesh M
Cognizant Technology Solutions
IN
The following are the basic differences between these two rules:
1. Class joins Rules helps to joins the two classes only when these two classes are having common column, but Association Joins will join the two classes even if they don't have a common column.
2. Class joins can not be used in multiple places and you can not refer then every time you want in your application, but Association join rules helps with the re usability feature.