SQL-Only Many-to-Many View Links?

Hi,
ADF, BC4J, Jdeveloper 10.1.3
I am working on a reporting system that contains a number of reports on tables that are linked with many-to-many relationships.
So for example, I have a COMPANIES table that is linked through an intermediate table to a CENTRES table. COMPANIES is also linked in a similar way to VOLUNTEERS. All these links are many-to-many.
From the companies report page, one can see the centres associated with that company, and vice versa. I would like these to be displayed as clickable links that take the user through to the report page for that table...
What is the best way to do this?
Because I am only reporting on these tables (no updates), I have created SQL-only view objects. I thought that View Links might be a good way of listing the associated rows and setting the appropriate row for the reports page when the user clicks a link, but I cant see a way of implementing a view link on a many-to-many relationship between sql-only views.
Is this possible? Or am I approaching this in the wrong way?
Any help greatly appreciated,
Alex.

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Change View Link SQL dynamically

Hi,
How i can modify the View Link SQL dynamically?
I have View Link CategoryVL and it is working fine with master (CategoryVO) & details (CoursesVO) tables and the two VO's are not based on EO. but i want to add more columns to the View Link SQL in PFR.
Please advicse.
thanks in advance.
Regards....Ashraf

Hitesh,
This a very generic case and happens when the source VO join attribute and destination VO join attribute are not of same type, i.e. data type and data length. Make sure that is happening in your case, this will solve your problem.
--Mukul

BC4J many-to-many relationship

I tried out the how to "Create Many-to-Many Associations and View Links".
In the Business Component Browser I can only browse the data, but I can't assign a new detail to a master (e.g. a product to a warehouse).
In an real-world application I want to assign details to masters, specify attributes of the intersection table (in the how to: inventories.quantity_on_hand) and have triggers and sequences for the id columns.
How to create Associations and View Links for that?
Bye
Holger

Does anyone have details on how to do this? I had the same problem recently and my "solution" was to create a new VO for the intersection table and then insert/remove rows directly to that to manage the relationships. It seems rather redundant to have to do it this way.

[SOLVED] Multiple Dynamic View Objects and View Links - ADF Tree Table

Hi all,
I've got a method that creates 3 dynamic viewobjects using this:
            ViewDefImpl Level1ViewDef = new ViewDefImpl("Level1View");
            Level1ViewDef.addViewAttribute("LevelDescription","LEVEL1_DESCRIPTION",String.class);
            Level1ViewDef.addViewAttribute("SetOfBooksId","SET_OF_BOOKS_ID",Number.class);
            Level1ViewDef.addViewAttribute("CodeCombinationId","CODE_COMBINATION_ID",Number.class);
            Level1ViewDef.addViewAttribute("Level1","LEVEL1",String.class);
            Level1ViewDef.addViewAttribute("AccountType","ACCOUNT_TYPE",String.class);
            Level1ViewDef.addViewAttribute("PeriodYear","PERIOD_YEAR",Number.class);
            Level1ViewDef.addViewAttribute("PeriodNum","PERIOD_NUM",Number.class);
            Level1ViewDef.addViewAttribute("PeriodName","PERIOD_NAME",String.class);
            Level1ViewDef.addViewAttribute("PtdActual","PTD_ACTUAL",Number.class);
            Level1ViewDef.addViewAttribute("YtdActual","YTD_ACTUAL",Number.class);
            Level1ViewDef.addViewAttribute("LtdActual","LTD_ACTUAL",Number.class);
            Level1ViewDef.addViewAttribute("BudgetName","BUDGET_NAME",String.class);
            Level1ViewDef.addViewAttribute("BudgetVersionId","BUDGET_VERSION_ID",Number.class);
            Level1ViewDef.addViewAttribute("PtdBudget","PTD_BUDGET",Number.class);
            Level1ViewDef.addViewAttribute("YtdBudget","YTD_BUDGET",Number.class);
            Level1ViewDef.addViewAttribute("LtdBudget","LTD_BUDGET",Number.class);
            Level1ViewDef.addViewAttribute("EncumbranceType","ENCUMBRANCE_TYPE",String.class);
            Level1ViewDef.addViewAttribute("EncumbranceTypeId","ENCUMBRANCE_TYPE_ID",Number.class);
            Level1ViewDef.addViewAttribute("PtdCommitment","PTD_COMMITMENT",Number.class);
            Level1ViewDef.addViewAttribute("YtdCommitment","YTD_COMMITMENT",Number.class);
            Level1ViewDef.addViewAttribute("LtdCommitment","LTD_COMMITMENT",Number.class);
            Level1ViewDef.setQuery(sql_level1);
            Level1ViewDef.setFullSql(true);
            Level1ViewDef.setBindingStyle(SQLBuilder.BINDING_STYLE_ORACLE_NAME);
            Level1ViewDef.resolveDefObject();
            Level1ViewDef.registerDefObject();
            ViewObject vo1 = createViewObject("Level1View",Level1ViewDef);I can create the view objects fine and create a single viewlink between two of them, however i'm getting problems with 2 view links.
This is how I'm creating a view link:
            ViewLink Level2Level1FKLink = createViewLinkBetweenViewObjects("Level2Level1FKLink1",
                                                    "Level2View",
                                                    vo1,
                                                    new AttributeDef[]{
                                                      vo1.findAttributeDef("Level1")
                                                    vo2,
                                                    new AttributeDef[]{
                                                      vo2.findAttributeDef("Level1")
                                                    "LEVEL1 = :Bind_Level1");
            ViewLink Level3Level2FKLink = createViewLinkBetweenViewObjects("Level3Level2FKLink1",
                                                    "Level3View",
                                                    vo2,
                                                    new AttributeDef[]{
                                                      vo2.findAttributeDef("Level2")
                                                    vo3,
                                                    new AttributeDef[]{
                                                      vo3.findAttributeDef("Level2")
                                                    "LEVEL2 = :Bind_Level2");I can get the data to display on an adf tree table if i'm only using a single view link, but when i try and implement 2 view link (for 3 levels on the adf tree table) i'm getting problems displaying the data.
I'm getting the following error:
Aug 10, 2007 2:44:39 PM oracle.adfinternal.view.faces.renderkit.core.xhtml.PanelPartialRootRenderer encodeAll
SEVERE: Error during partial-page rendering
oracle.jbo.NoDefException: JBO-25058: Definition Level3View of type Attribute not found in Level2View_Level2Level1FKLink1_Level2ViewThe thing is, Level3View isn't in the Level2Level1FKLink viewlink.
I've been reading about something similar here
BC4J Master-Detail-Detail
but I am still unsure of what the problem is.
Thanks in advance.

I found the answer here:
http://radio.weblogs.com/0118231/stories/2004/06/10/correctlyImplementingMultilevelDynamicMasterDetail.html

View link between calculated attributes

Hi all,
I'm having a problem with a view link. See, I'm linking two view objects on attributes that are calculated. The two view objects are result of sql query (not EO based) - plus, this attribute is present in the SQL query and in the db table for both view object.
The SQL query is like, for both view object :
select to_char(DATE_FO, 'dd/MM/yyyy), a, b, from ...
And, as I said, I made a view link on these attributes. The cardinality is 1 to *.
When testing the ApplicationModule, I'm getting
(oracle.jbo.SQLStmtException) JBO-27122: SQL error during statement preparation. SELECT ....... ) QRSLT WHERE DATETOCHAR = :Bind_ToCharGdaCrahDateCrahDdMm
----- Level 1: Detail 0 -----
(java.sql.SQLException) ORA-00904: "DATETOCHAR" : identificateur non valide
DATETOCHAR is the alias of the calcultated attribute in detail vo.
Please help ! Also I've been reading Steve's article : urlhttp://radio.weblogs.com/0118231/2003/11/13.html[url] ; what is jbo.viewlink.consistent property exactly ?
Regards
Luc

Hi again,
ok I found it ... I needed to add an alias in the SQL query and override the default sql where clause in the view link. Something weird btw, because the alias in the sql query seems to be not bind to the alias property in the attribute properties... and it add another attribute. But it works fine.
Therefore, if Steve muench might explain jbo.viewlink.consistent property, I'm stil interested in knowing that :)
Luc

Many - to - many view links (master-detail)

Case :
I have a relation many-to-many between two tables, composed of 3 tables:
Table Users ( User_Id, User_name ) // Master 1
Table Groups ( Group_Id, Group_name ) // Master 2
Table Users_Groups ( User_Id, Group_Id ) // Child (holding then many - many relation)
Need :
I want to make Master-detail relation, so that when I change the group (Master 2) the details of the users - user_id, user_name - in this group appear in table below.
problem :
All the master-detail examples I have seen in Jdeveleoper, between One - many realtionship, where the details table contain the information to be displayed; now my case that the details to be displayed is in another table (Master 1) not in the child table directly.
So using ordinary view Link between the a master table and the child table displayes only the Id's of the child table but I need that the names that in (Master 1) table which is related to the selected master id.
Thankx

Duplicate of add where clause to detail view in master/detail relation
Timo

Many to Many View Link

Hello All
I just wish to know how to create a many to many view link. I have created a many to many association. In the view link wizard it is supposed to show me an association in 2 tables which are associated via the intersection table in the association right? Because that does not happen. I can only see the association in one table, while it is just not there in my source table. The expose check is clicked in both the source and the destination but in the destination table it is just not shown.
I do not know if I am approaching this the right way? Should I create a view for the intersection table?
If anyone can shed any light on this I would be eternally gratefull

I solved the problem but now have a different one.
The problem was I created some views and then created an association. Unfortunately associations are based on entities and views do no automatically update from the entities, so I had to create a new view, based on the entity AFTER I had created the association. This allowed me to create a many to many view link between the two.
Here is a question. Is it really neccessary to create these many to many relations (which are in my database) if all I need is to create a read only page (for users with only read privileges)? Because after dropping my new view with a many to many view link onto my jspx page and creating a read only form, It did not really work that well for showing what I needed shown, all it did was show the attributes from the one table, not the 3 (the 2 tables and the intersection) I needed.
I am probably not making sense, this is just a web of entangled entanglement.

Many to Many PL/SQL - how to nest a linking table?

I have two objects that are linked with a many-to-many relations. These two objects have to be nested inside a third object. How should I do ?
I created the type and the table for A, I did the same for B and I finally created the linking table for A and B. How shall I nest this table inside the object C?
Thank you very much for your help as I am new to PL SQL.

I need to create one object called Container. From a modelling perspective, this object has contains all the other objects.
The other objects are items and composed items. The Container contains the items (it is a one-to-many relationships so I created a nested table) but it also contains composed items, which are items linked to parts and this is a many-to-many relationship. How do I do to include the many-to-many in the object container? I included question marks when I did not know. Thank you
CREATE OR REPLACE TYPE Item_type (
Id NUMBER (6),
Type CHAR (7)) ;
CREATE OR REPLACE TYPE Part_type (
Id NUMBER (6),
Type CHAR (7)) ;
CREATE TABLE Item OF Item_type
(Id NOT NULL,
PRIMARY KEY (Id));
CREATE TABLE Part OF Part_type
(Id NOT NULL,
PRIMARY KEY (Id));
CREATE TABLE ComposedItems
(ItemId REF Item_type ,
PartId REF Part_type);
CREATE OR REPLACE TYPE ComposedItems_nested as TABLE OF *????????*
CREATE OR REPLACE TYPE Item_type (
Id NUMBER (6),
Type CHAR (7));
CREATE OR REPLACE TYPE Item_nested as TABLE OF Item_type;
CREATE OR REPLACE TYPE Container_type (
Id NUMBER (6),
Type CHAR (7),
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Defining Dimensions, Attribute Hierarchies for a Link Table(Many to Many)

I have 3 Tables in the Database
Table 1: Transactions (Fact Table) - PK(TransactionId)
Table 2: Relationship (Dimension1) - PK(Relationship Id), FK_TransactionId, FK_CompanyId, RelationshipType
Table 3: Companies (Dimension 2) - PK(CompanyId)
Table 2: Relationship table is a link table between Transactions & Companies to facilitate many to many relationship.
I defined Fact and Dimension tables accordingly but having issues defining Dimension & Attributes for Relationship tables
Relationship Dimension:
I have 3 hierarchy groups defined
Hierarchy 1 - Relation -Relationship Type,Relationship Id(PK)
Hierarchy 2 - Transaction - Transaction, Relationship Id(PK)
Hiearchy 3 - Company - CompanyId, Relationship Id(PK)
Defined the attribute relationship in the following way
RelationshipID(PK) ---> CompanyId , RelationshipID(PK) ---> TransactionId, RelationshipID(PK)
---> RelationshipTYpe
I am getting incorrect results when I deploy the cube. Not all the types are being displayed only 4 types are being displayed out of 27 types though there exists Transactions for all the Types.
To fix the incorrect results, I tried to break the Relationship Dimension into 2 dimensions seperating Transaction(Relationship Dim) & Company,Type (Companies Dim). I tried to configure a many
to many Relationship type between my Companies Dim & Fact Table Transaction. But I get the error that says
"Companies Dim many to many dimension in the Tansaction measure group requires that the granularity of the Relationship dimension is lower than that of the Relationship measure group "
Any help regarding how to difine Dimensions & Attribute Hierarchies on a Many to many link table is appreciated.

Hi Jaya,
According to your description, you are experiencing the issue when implement many to many relationship by using a bridge table in your SQL Server Analysis Services project, right?
Generally, a bridge table will have a surrogate key for the dimension and a surrogate key to the fact table or a degenerate dimension based on the fact table. Here are some blogs which describe how to implement many to many relationship using a bridge
table.
http://bifuture.blogspot.com/2011/06/ssaskimball-modeling-nm-relation.html
http://www.sqlchick.com/entries/2012/1/22/data-modeling-tip-when-using-many-to-many-bridge-tables-in-s.html
http://social.technet.microsoft.com/wiki/contents/articles/22202.a-practical-example-of-how-to-handle-simple-many-to-many-relationships-in-power-pivotssas-tabular-models.aspx
Regards,
Charlie Liao
TechNet Community Support

Create/update with Many-to-Many view

Are views that are based on a many to many relationship read-only?
In other words, with some row current in one DataSource (its view as one end of the many to many relationship) can I create a new row in the other DataSource (through its view object) and have the intersection table be updated automagically?
Seems to simply insert a row into the other table without adding a row to the intersection table.
If this is way off base, then how does the framework update the intersection table? Or how should I be updating the intersection table within the context of the framework?
Thanks.

Are views that are based on a many to many relationship read-only?
In other words, with some row current in one DataSource (its view as one end of the many to many relationship) can I create a new row in the other DataSource (through its view object) and have the intersection table be updated automagically?
Seems to simply insert a row into the other table without adding a row to the intersection table.
If this is way off base, then how does the framework update the intersection table? Or how should I be updating the intersection table within the context of the framework?
Thanks. Jared:
It's not that the VO involved in a m-n link read-only. It's that the logic to populate the intersect table is currently missing.
The way to get around this problem is as follows: Suppose we have m-n relationship between STUDENT, COURSE, and ENROLLMENT (ENTROLLMENT is the intersect table).
1. Build an EO and a VO for the intersect table on the intersect table (ENROLLMENT).
2. Build a view link between the 'detail' EO (say COURSE) and the intersect EO (ENROLLMENT). Build another one between master (STUDENT) and the intersect EO.
3. In the application module, add ENROLLMENT VO as detail of multiple masters STUDENT and COURSE.
If you need instruction on how to build multiple master for VO in an AM, please look at the OTN thread:
Re: customized download function no longer working after last db recovery
Search for 'multiple' in my posting (Sung Im).
When you run this AM, you can select the desired STUDENT and COURSE. If you insert a new row into ENROLLMENT, you should see both StudentId and CourseId populated.
Thanks.
Sung

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Hi,
quite new to ADF (UIX) but already in serious trouble ;-)
I have 3 Entity Objects: Items, Audiovisuals and Images which map to 3 (different!) Tables. Strictly speaking Audiovisuals and Images are SubTypes of generell Items. But I decided not to implement the super-class-sub-class on entity level but on view level instead.
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any hints?
thanks, Christian

How many devices can I link to my I-cloud/I-match account?

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EXAMPLE
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Hi
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SQL-Only Many-to-Many View Links?

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