Regarding foreign keys

Hi
i have got tables tab1. now tab1 has composite primary key
col1and col2. for col1 there are many values of col2. thus many records in tab1 can have same value for col1 but unique value for col2 for corresponding values for col1. see below
col1 col2
1 1
1 2
1 3
2 1
2 2
3 1
4 1
4 2
4 3
now i have designed a form on this table.
now my requirement is that i have two items for this two columns and they are pop up lov's. now my requirement is that when i select a value for item col1 thru its LOV then LOV for col2 should be populated as per the value of col1.
For example if col1 value is 1 than LOV for col2 should contain values 1,2,3,4.
i tried to do it thru computation but the computation has options before after header, footer, region.
Also cannot do it thru processes.
Please relp urgently.
Thanks
Ameya

Hi and welcome to the forum.
Now , can I define a foreign key at column level in oracle?please help.Yes, you can. http://en.wikipedia.org/wiki/Foreign_key
Oracle Documentation is your friend, explore it and search it:
http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_constraints.htm#sthref744
Oracle documentation home = http://tahiti.oracle.com, from there you can search on your keywords of specific interest easily.
Make sure to choose to drilldown on your own database version.

Similar Messages

Regarding Foreign Key Joins

Hi Gurus,
I learnt that its not practical to use Foreign Key joins in the Business Model and Mapping layer. Why is that, i tried a simple Sample Star schema that uses only Foreign Key joins instead of Complex Joins in BMM Diagram, The RPD is consistent and is running successfully on BI Server.
What is the drawback if i did so and why is not recommended?
Regards,
Sreekanth.

Complex joins allow the BI Server to choose the best route between logical tables in the BMM layer based on the phyiscal joins that exist for the Logical table sources within those tables.
With an FK join your limiting the choices BI server has when it generates the ideal SQL to accomplish the request.
The complex joins allow :
easier config,
BI Server to navigate across different levels (for example Day and Month) when using different level facts.

Regarding Foreign Key

Hi,
Suppose, I am havin two tables.:
Emp:
empid(pk) ename sal
dept:
deptno(pk) empid(fk) deptname
Suppose, I want to insert some values into dept-table's empid, Can I able to insert or that empid(fk)constraint restricts me to insert anything?
Thanks

Hi,
An example:
Connected to Oracle Database 10g Express Edition Release 10.2.0.1.0
Connected as hr
SQL> desc emp
Name Type         Nullable Default Comments
EMPID NUMBER(9)
ENAME VARCHAR2(30)
SAL   NUMBER(9,2)
SQL> desc dep
Name         Type      Nullable Default Comments
DEPTNO       NUMBER(9)
FK_EMP_EMPID NUMBER(9) Y
SQL> insert into emp values(1, 'John Rambo', 12349);
1 row inserted
SQL> insert into dep(deptno, fk_emp_empid) values(1, null);
1 row inserted
SQL> insert into dep(deptno, fk_emp_empid) values(2, 1);
1 row inserted
SQL> insert into dep(deptno, fk_emp_empid) values(3, 2);
insert into dep(deptno, fk_emp_empid) values(3, 2)
ORA-02291: integrity constraint (HR.FK_DEPTO_EMP) violated - parent key not
SQL> Regards,

Binding for table produces list for other tables using foreign key and crea

Using
software Jdev 11G, WLS 11G, Oracle DB 11G, Windows Vista platform
technology EJB 3.0, jspx, backing beans, session bean
I cannot create a namedquery on my secondary table. The method for the column uses the entity object rather than the name and value of the column.
For instance,
(Coketruck) table has inventory records(Products) table
Coketruck has one to many to the Products table
Products has a many to one to the Coketruck
I need to return the products from the product table based on the CokeTruck but I cannot create a namedQuery because the method in the Product table is an entity object type instead of a long that I can use to look up all the products based off the column truck_id.
This is what I was expecting…
Private Long truckId;
public Long getTruckId() {
return truckId;
public void setTruckId (Long truckId) {
this. truckId = truckId;
Instead this is what I have…
@ManyToOne
@JoinColumn(name = "TRUCK_ID")
private Coketruck coketruck;
this. coketruck = coketruck
public Coketruck getCoketruck() {
return coketruck;
public void set Coketruck (Coketruck coketruck) {
this. coketruck = coketruck;
How do I do a query on the Product table to return all the products that are in the coketruck?
If I do the following it expects for me to pass the Entity Object which I cannot use as search criteria for my find method.
@NamedQuery(name = "Products.findById", query = "select o from Products o where o.truckId = :truckId")
On a different note but the same song…
I noticed that when I look at my Session Bean Data Contols that the coketruck already has a list of the products. I have created a jsp page with a backing bean and have been able to use the namedquery on the coketruck entity to retrieve the productList. Unfortunately I need to sort the products by type and was also not able to find where to perform the work to be able to iterate through the productList to get my desired display. Therefore I started looking at doing another namedquery that would only retrieve the product_type ordering by the truckId.
Seems I have come full circle… I don’t care what method I have to use to get the info back.
Any help is greatly appreciated!

user9005175 wrote:
Hi!
I work on an application wich uses a shopping cart stored in a database. The shopping cart uses two tables:
CART: Holds information common for one shopping cart: the user it is connected to etc.
- Primary key: CART_ID
CART_ROW: One row in the cart, e.g. one new product to buy.
- Primary key: ROW_ID
- Foreign key: CART_ROW.CART_ID references CART.CART_ID
From the code the rows in the cart are collected per cart, as is modelled by the foreign key. There exists one more relationship, which we use in the code, but which is not modelled by a foreign key in the database. One row can be dependent on another row, which makes the other row a parent.
CART_ROW has a column PARENT_ID which references CART_ROW.ROW_ID.
Should we add a foreign key for PARENT_ID? Or are there any questions to consider when it is a foreign key to the same table?
I suggest to add foreign key it wont harm the performance (except while on insert when there would be validation for the foreign key). But it would prevent users to insert wrong/corrupt data either through code or directly by loggin in the database.
A while ago we added indexes, both on ROW_ID and on PARENT_ID. Could the index on PARENT_ID have been harmful, since there is no foreign key?
Index on parent_id would only be harmful if you do not make use of index after creating it (i.e. there is no query which make use of this index).
And if you decide to have a foreign key on parent_id then I suggest to have index too on parent_id as it would be helpful atleast when you delete any record in this table.
Best regards!

Editable ALV & Foreign Key Check

I am working on an Editable ALV. Here if I try to enter some value into a field which doesnt exist in the corresponding Check table of the field, ALV throws me an error. This scenario is working fine.
But in some scenarios I populate the ALV table from a Z table (Z table has the same strucutre as the ALV table) and then show this to the user as an editable ALV but in this scenarios if some erroneous values exist in my Z table for a particular fieId I am not getting the Foreign Key check I mentioned earlier. Here I was hoping to get error message after SET_TABLE_FOR_FIRST_DISPLAY !
I am using CL_GUI_ALV_GRID, has anyone found a workaround for this
Antony

Hi Antony,
you can INHERIT a class from CL_GUI_ALV_GRID and then redefine SET_TABLE_FOR_FIRST_DISPLAY adding the raising EVENT data_changed for all cells.
Regards,
Clemens

How can I create a new entry without using LOV for foreign keys.

Referring to TUHRA sample application based on HR database schema. JDeveloper 10.1.3.0.4
How can I create a new employee without using LOV for the foreign key "job_id".
On the first page I would like to choose the job_title from adf read-only table.
After clicking on the "create new employee button" a creation form appears in which the job_id field is set with previous selection.
Regards M.Winkler
Edited by: user3541283 on 06.10.2008 03:44
Edited by: user3541283 on 06.10.2008 03:50

Hi,
usually the foreign key is only set if the VO you select is dependent from a master. If e.g. you have DepartmentsVO1 that has an EmployeeVO3 as its nested VO, then creating a new instance of employees automatically add the foreign key. If you add EmployeesVO1, which is not dependent to DepartmensVO1, then the foreign key is not set. So if this is the case in THURA (keep in mind that this is not an Oracle demo but a sample used in a book about ADF) then all you need is to take the independent VO when building the new employee form.
Frank

How to create a Foreign key relationship between 2 user defined tables...

Hi Folks,
I have created two user defined tables... Where in i want to create foriegn key relationship between the 2 tables.... Can anyone guide the step by step procedure to do this scenario...
Any help would be highly appreciated...
Thanks

Hi
1. In the 2nd table call the field of the 1st table which is a primary key.
2. Give the same field and dataelement name.
3. Select that field and then click on the foreign key field icon which is beside Search Help button.
4. Then give short text, and the 1st table name.
5. Then in the below box give the 2nd table name and 2nd table field name which you have called from 1st table.
6. Then click on copy, then u will be able to see Check table name and check table field name beside foreign key table name.
7. Then again click on copy.
Regards
Haritha.

Maintenance View for custom table with foreign key relationship

Hi Folks,
I have created a custom table with foreign key relationship with other check tables. I want to create a maintenance view / tablemaintenance generator. What all things I need to take care for the foreign keys related fields while creating the maintenance view / tablemaintenance generator.
Regards,
santosh

Hi,
You do not have to do anything explicitely for the foreign key relationships in the table maintainance generator.
Create the table maintainance generator via SE11 and it will take care of all teh foreign key checks by itself.
Regards,
Ankur Parab

Foreign key Mapping based on Data - in SQL Developer Data modeler

Team
Do SQL Developer Data modeler supports Foreign Key mapping based on the Data in the Schema rather defined at the DDL ? For e.g if we implement a Objects Relation ship mapping in Data base, we don't define Foreign keys at table creation.
Toad does this feature through "AUTOMATIC FOREIGN KEYS MAPPING IN TOAD DATA MODELER" more info at (http://toadworld.com/Blogs/tabid/67/EntryId/905/Automatic-Foreign-Keys-Mapping-in-Toad-Data-Modeler.aspx)
any one know how to implement through some scripts also helps me
Regards
Raj

If you have table PKs defined and the candidate columns match those PK columns, then you can use the Discover Foreign Keys utility. Right mouse over the relational model name (node) in the left browser. It is about half way down the menu. I did a blog post about it last week on kentgraziano.com.

Foreign key not working in a table control set on a pop-up window

Hi Experts,
I have created a table control using EEWB on BUPA object. I have moved this table control using BUCO transaction to address view. As the address is displayed in BP transaction as a pop-up window, when the error message from the foreign key verification should raise the pop-up window is closed and nothing happens. What I want is the error doesn,t let the window to be closed and show an error message. Any suggestion to achieve that?
Thanks in advance.
Rosa

Hi,
Please check demo program DEMO_DYNPRO_TABLE_CONTROL_2.
Try to copy to custom program and make the following line changes.
MODULE CHECK_ALL INPUT.
CASE OK_SAVE.
    WHEN 'ALLM'.
      LOOP AT ITAB.
*       IF itab-mark = 'X'.
*         MESSAGE i888 WITH 'Zeile' sy-tabix 'markiert'.
*       ENDIF.
        ITAB-MARK = 'X'.
        MODIFY ITAB.
      ENDLOOP.
Hope this will help ...
Regards,
Ferry Lianto

Assigning a foreign key

i have created a database which is administered by ora1 who created 2 tables called student and instructor then created a new user called dev1 with dba priviliges dev1 created a table called university assigned a primary key to the university_id column and has added new columns to the instructor and student tables owned by ora1 the problem i am having is i am unable to assign foreign keys to the 2 tables owned by ora1 even though dev1 could add the extra university_id columns to the 2 tables the code i am using to add extra columns and assign the foreign keys is as follows:
alter table ora1.student
add (university_id varchar2 (5));
alter table ora1.student add
constraint student_fk1
foreign key (university_id)
references university (university_id)
on delete cascade;
I keep getting error message saying table or view does not exist

hi u are using the right format
ALTER TABLE <table_name>
ADD <constraint_name> FOREIGN KEY
(<column_name1> ,
<column_name2> )
REFERENCES <table_name>
(<column_name1> ,
<column_name2>)
ALTER TABLE ora1.student
ADD student_fk1 FOREIGN KEY
(university_id)
REFERENCES university (university_id)the problem may be your table doesnot exist or u are refering the table which is in different schema
Regards
Hitesh

Database adapter - table related by foreign key - not picking

Hi All,
we have a Invoke which picks data from database by using the query feature(not polling) of db adapter.
we are picking data from multiple tables.
there is foreign key relation between tables,which we have defined at the db adapter.
Parent - > child 1
> child 2 > child 3
> child 4 > child 5
So we have a case where parent has 3 rows but children tabls have 3000+.
This error is happening in such cases.
Please let me know.
<2009-08-06 16:58:54,833> <ERROR> <default.collaxa.cube.engine> The execution of this instance "90045" for process "XXSOA_ESP4G_ROUT_ABC_SRC" is supposed to be in a jta transaction, but the transaction is not present or in active state, please turn on the application server transaction debug logs to get more information.
<2009-08-06 16:58:54,842> <WARN> <default.collaxa.cube> <BaseCubeSessionBean::logError> Error while invoking bean "activity manager": Failed due to unhandled bpel fault.
<2009-08-06 16:58:54,852> <ERROR> <default.collaxa.cube.engine.dispatch> <DispatchHelper::handleMessage> failed to handle message
ORABPEL-02182
JTA transaction is not present or the transaction is not in active state.
The current JTA transaction is not present or it is not in active state when processing activity or instance "90,045". The reason is The execution of this instance "90045" for process "XXSOA_ESP4G_ROUT_ABC_SRC" is supposed to be in a jta transaction, but the transaction is not present or in active state, please turn on the application server transaction debug logs to get more information..
Please consult your administrator regarding this error.
     at com.collaxa.cube.engine.CubeEngine.store(CubeEngine.java:5514)
     at com.collaxa.cube.engine.CubeEngine.endRequest(CubeEngine.java:5799)
     at com.collaxa.cube.engine.CubeEngine.expireActivity(CubeEngine.java:2086)
     at com.collaxa.cube.ejb.impl.ActivityManagerBean.expireActivity(ActivityManagerBean.java:174)
     at com.collaxa.cube.ejb.impl.ActivityManagerBean.expireActivity(ActivityManagerBean.java:145)
     at sun.reflect.GeneratedMethodAccessor76.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.evermind.server.ejb.interceptor.joinpoint.EJBJoinPointImpl.invoke(EJBJoinPointImpl.java:35)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.JAASInterceptor$1.run(JAASInterceptor.java:31)
     at com.evermind.server.ThreadState.runAs(ThreadState.java:693)
     at com.evermind.server.ejb.interceptor.system.JAASInterceptor.invoke(JAASInterceptor.java:34)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.TxRequiredInterceptor.invoke(TxRequiredInterceptor.java:50)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.InvocationContextPool.invoke(InvocationContextPool.java:55)
     at com.evermind.server.ejb.StatelessSessionEJBObject.OC4J_invokeMethod(StatelessSessionEJBObject.java:87)
     at ActivityManagerBean_LocalProxy_4bin6i8.expireActivity(Unknown Source)
     at com.collaxa.cube.engine.dispatch.message.instance.ExpirationMessageHandler.handle(ExpirationMessageHandler.java:43)
     at com.collaxa.cube.engine.dispatch.DispatchHelper.handleMessage(DispatchHelper.java:141)
     at com.collaxa.cube.engine.dispatch.BaseDispatchTask.run(BaseDispatchTask.java:58)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
     at java.lang.Thread.run(Thread.java:595)
<2009-08-06 16:58:54,853> <ERROR> <default.collaxa.cube.engine.dispatch> <DispatchHelper::handleMessage> Not fatal connection error ... not retrying: class com.collaxa.cube.engine.UnhandledFaultException: Failed due to unhandled bpel fault.
<2009-08-06 16:58:54,854> <ERROR> <default.collaxa.cube.engine.dispatch> <BaseDispatchTask::run> Failed to handle dispatch message ... exception ORABPEL-05002
Message handle error.
An exception occurred while attempting to process the message "com.collaxa.cube.engine.dispatch.message.instance.ExpirationMessage"; the exception is: JTA transaction is not present or the transaction is not in active state.
The current JTA transaction is not present or it is not in active state when processing activity or instance "90,045". The reason is The execution of this instance "90045" for process "XXSOA_ESP4G_ROUT_ABC_SRC" is supposed to be in a jta transaction, but the transaction is not present or in active state, please turn on the application server transaction debug logs to get more information..
Please consult your administrator regarding this error.
ORABPEL-05002
Message handle error.
An exception occurred while attempting to process the message "com.collaxa.cube.engine.dispatch.message.instance.ExpirationMessage"; the exception is: JTA transaction is not present or the transaction is not in active state.
The current JTA transaction is not present or it is not in active state when processing activity or instance "90,045". The reason is The execution of this instance "90045" for process "XXSOA_ESP4G_ROUT_ABC_SRC" is supposed to be in a jta transaction, but the transaction is not present or in active state, please turn on the application server transaction debug logs to get more information..
Please consult your administrator regarding this error.
     at com.collaxa.cube.engine.dispatch.DispatchHelper.handleMessage(DispatchHelper.java:206)
     at com.collaxa.cube.engine.dispatch.BaseDispatchTask.run(BaseDispatchTask.java:58)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
     at java.lang.Thread.run(Thread.java:595)

Also for above issue , we increased the timeout in transaction manager
transaction-timeout and syncMaxWaitTime properties as follows:
Property     File Location     This Value Must Be...     Example
transaction-timeout     SOA_Oracle_Home\j2ee\home\config\transaction-manager.xml     Larger than the transaction-timeout value in orion-ejb-jar.xml and the syncMaxWaitTime value.     7200
transaction-timeout     SOA_Oracle_Home\j2ee\home\application-deployments\orabpel\ejb_ob_engine\orion-ejb-jar.xml     Less than the transaction-timeout value in transaction-manager.xml.
Note: You must set all transaction-timeout properties that display in this file.     3600
syncMaxWaitTime     SOA_Oracle_Home\bpel\domains\domain_name\config\domain.xml
where domain_name is the name of the domain to which you are deploying.     Less than the transaction-timeout value in orion-ejb-jar.xml.     240
2.
The above refernece was useful in resolcing our issue.
Regards
Arc

Unable to drop foreign key on a version-enabled table

Hi,
We're using Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit and I'm trying to delete a foreign key from a version-enabled table.
The constraint shows in ALL_WM_RIC_INFO view. I run exec dbms_wm.beginddl('tablename'), when I inspect the generated <tablename>_LTS I don't see any referential integrity constraints generated on that table ? The constraint i'm trying to delete is from a version-enabled table to a non-version enabled table if that makes a difference.
From what I understand the referential integrity constraint would be generated and I would be able to run something like:
ALTER TABLE <tablename>_LTS DROP CONSTRAINT <constraintname>.
I tried running the above statement using the RIC_NAME from ALL_WM_RIC_INFO view but it fails predictably with:
ORA-02443: Cannot drop constraint - nonexistent constraint
Cause: alter table drop constraint <constraint_name>
Action: make sure you supply correct constraint name.

as I ran into this today as well I feel like answering this question, as I suppose that the thread opener did the same mistake as I did, and maybe
some others do it as well :)
of course you need to open a DDL session on the parent table as well in order to drop foreign key constraints, just as you do when you add them.
so the correct order to make it work would be:
EXECUTE DBMS_WM.BeginDDL('PARENT_TABLE');
EXECUTE DBMS_WM.BeginDDL('CHILD_TABLE');
ALTER TABLE CHILD_TABLE_LTS
DROP CONSTRAINT FOREIGN_KEY_NAME
EXECUTE DBMS_WM.CommitDDL('CHILD_TABLE');
EXECUTE DBMS_WM.CommitDDL('PARENT_TABLE');I felt kind of stupid that it took me 1 hour to figure this out ;)
regards,
Andreas

Questions about creating a foreign key on a large table

Hello @ll,
during a database update I lost a foreign key between two tables. The tables are called werteart and werteartarchiv_pt. Because of its size, werteartarchiv_pt is a partitioned table. The missing foreign key was a constraint on table werteartarchiv_pt referencing werteart.
Some statistics about the sizes of the mentioned tables:
werteart 22 MB
werteartarchiv_pt 223 GB
werteartarchiv_pt (Index) 243 GB
I tried to create the foreign key again, but it failed with the following error (Excuses for the german error message):
sqlplus ORA-00604: Fehler auf rekursiver SQL-Ebene 1
sqlplus ORA-01652: Temp-Segment kann nicht um 128 in Tablespace TEMPS00 erweitert
The statement I used:
alter table werteartarchiv_pt
add constraint werteartarchiv_pt_fk1
foreign key (schiene, werteartadresse, merkmale)
references werteart (schiene, werteartadresse, merkmale)
on delete cascade
initially deferred deferrable;
So the problem seems to be, that Oracle needs a lot of temporary tablespace to generate the foreign key and I do not know how much and why.
My questions now are, and hopefully someone is here, who can answer all or a part of it:
1) Why does Oracle need temporary tablespace to create the foreign key? The foreign key uses the same columns like the primary key.
2a) Is it possible to tweak the statement without using the temporary tablespace?
2b) If it is not possible to avoid the usage of the temporary tablespace, is there a formula how to calculate the needed temporary tablespace?
3) Is it possible to modify data in the tables while the foreign key is created or is the whole table locked during the process?
Any help or hint is appreciated.
Regards,
Bjoern

RollinHand wrote:
My questions now are, and hopefully someone is here, who can answer all or a part of it:
1) Why does Oracle need temporary tablespace to create the foreign key? The foreign key uses the same columns like the primary key.Because it's validating the data to ensure the foreign key won't be violated. If you had specified ENABLE NOVALIDATE when creating it then the existing data in the table wouldn't need to be checked and the statement should complete instantly (future data added would be checked by the constraint).
http://download.oracle.com/docs/cd/B28359_01/server.111/b28310/general005.htm
Search for "Enable Novalidate Constraint State"

Ora-2270 Error while adding foreign key constraint on top a view

While adding a constraint, referencing a foreign key column from a view raises error. However, it works fine over a table.
Here's the sample script:
create table t_temp (
sample_id number,
text varchar2(40))
alter table t_temp add constraint temp_pk
primary key (sample_id);
create view tempvw as select sample_id,text from t_temp;
create table t_sample (
uniq_id number,
sample_id number,
sample_text varchar(40));
=========
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp
     FOREIGN KEY (sample_id) REFERENCES t_temp (sample_id);
This works fine.
=========
==============
The following raises ERROR....
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp1
     FOREIGN KEY (sample_id) REFERENCES tempvw (sample_id);
Error starting at line 1 in command:
ALTER TABLE t_sample ADD CONSTRAINT FK_sample_temp1
     FOREIGN KEY (sample_id) REFERENCES tempvw (sample_id)
Error report:
SQL Error: ORA-02270: no matching unique or primary key for this column-list
02270. 00000 - "no matching unique or primary key for this column-list"
*Cause:    A REFERENCES clause in a CREATE/ALTER TABLE statement
gives a column-list for which there is no matching unique or primary
key constraint in the referenced table.
*Action:   Find the correct column names using the ALL_CONS_COLUMNS
catalog view

What exactly are you trying to accomplish by having a
referential integrity constraint on a view (which is
not allowed). PKs and FKs are allowed on views. DISABLE NOVALIDATE is the only allowed state for them. View constraints are used for query rewriting: http://download.oracle.com/docs/cd/B19306_01/server.102/b14223/qradv.htm#sthref1457
Regards,
Dima

Regarding foreign keys

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