How can you add a where clause using "OR" with applied ViewCriteria?

Question

[JDeveloper 10.1.3 SU4]
[JHeadstart 10.1.3 build 78]
I am using JHeadstart, but have a question probably more in the ADF area. On the JHeadstart forum I asked:
"I am overriding JhsApplicationModule's advancedSearch in order to be able to search in childtables. I created transient attributes, display those in advanced search and in the overridden method I check if any of these are filled by the user and create a where clause like 'EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> AND <another column in childtable> LIKE '<value supplied by user>)'. I add this whereclause using ViewObject.setWhereClause.
So far so good and it works. However, if the user selects 'Result matches any criteria', combining setWhereClause and the normal advancedSearch QueryByExample implementation using ViewCriteriaRow do not provide the desired result, since the ViewCriteria and the setWhereClause are AND-ed together, which is fine if the user selects the (default) "Results match all criteria" (everything is AND-ed) but not the "Result matches any criteria", since then every criterium is OR-ed together, except for the setwhereclause criteria and the set of ViewCriteriaRows, they are AND-ed.
I looked if I could specify that a WhereClause will be OR-ed to existing applied ViewCriteria, but no luck. Do I have to rewrite also advancedSearch's ViewCriteria implementation and write an entire setWhereClause implementation to be able to "OR" every criterium? Or any other suggestions? Can I look at the entire Where clause and rewrite it (after applyCriteria and setWhereClause are called on the VO)?
Toine"
Sandra Muller (JHeadstart Team) told me today: "This sounds like a JDeveloper/ADF issue that is not related to JHeadstart. The question is: how can you add a where clause using "OR" if there are already one or more ViewCriteria applied?
To simplify the test case, you could create a simple ADF BC test client class in a test Model project without JHeadstart (in the test class, use bc4jclient + Ctrl-Enter), in which you first apply a few ViewCriteriaRows to a View Object and also add a where clause.
Can you please log a TAR at MetaLink ( http://metalink.oracle.com/ ), or ask this question at the JDeveloper forum at http://otn.oracle.com/discussionforums/jdev.html ? (This what I am doing now ;-))
Thanks,
Sandra Muller
JHeadstart Team
Oracle Consulting"
Anyone knowing the answer or am I asking for an enhancement?
Toine

Answer 1

Hi,
Can you SET your whereclause as follows ?
('Y' = <isAnd>
and EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> AND <another column in childtable> LIKE '<value supplied by user>))
OR ('N' = <isAnd>
AND EXISTS (SELECT 1 FROM <childtable> WHERE <column in childtable> = <column in EO's table> OR <another column in childtable> LIKE '<value supplied by user>))
)