EF beta - views with no primary key

When importing views into the entity framework designer, it often gives this error (in the edmx file only; no error is shown in the UI):
warning 6013: The table/view '[view name]' does not have a primary key defined and no valid primary key could be inferred. This table/view has been excluded. To use the entity, you will need to review your schema, add the correct keys, and uncomment it.
I don't want to cloud the issue by going into the details of the views in question; there will always be views where no PK can be inferred automatically, for many reasons. And I am quite happy to define the key fields myself after import. The problem is that it can't be imported at all. So my question to the ODP.NET developers is: can you just import it, and leave me to define the PK?
The workaround I am using is:
1) define a temp table of the same structure
2) temporarily recreate the view as "select * from [temp table]"
3) update the model from database
3) recreate the proper view
But it's a pain. I have to remember to do that every time I update the model from the database. If I forget, it wipes the mapping, and I have to redefine it manually, field by field.

Unfortunately there is still a problem, in a minority of cases:
Error 75: Key Part: '[field name]' for type [view name] is not valid. All parts of the key must be non nullable.
This happens when the view field is not marked "not null". Generally it flows through from the underlying table field. But one of my views involves a "union all". The underlying table fields are marked "not null" but it doesn't make it through the "union all". The view has a primary key, but still the error.
I would rather it just trust me that primary key fields will never be null.

Similar Messages

Creating a view with a primary key

I want to create a view with a defined primary key. I understand
the view is created within a select statement, but do not
understand how you would define a particular field as a primary
key in the view. Also if your select statement attempts to build
the view and has duplicate keys in the select result set, what
would happen when the duplicate key is found? Would it just not
include the duplicate key in the view?
Thanks in advance for your help.
-Pat

I have a rather difficult problem with duplicate invoice numbers
contained in unique records. In other words I have many records
that appear as follows:
3593, 0004009090, CUSTOMER, TAX, 20000117,014011976-01
4411, 0004009090, CUSTOMER, TAX, 20000718,014011976-01
The last field is invoice number '014011976-01' In my case I am
building a flat file using UTL_FILE for loading into SAP
Business Warehouse. In SAP I need to have Invoice number as a
key in which case I can't have duplicate invoice numbers. All
the SQL I have tried to date returns a large amount of records
similar to the above records. I am selecting these records from
4 different schemas which represent 4 different companies. I
realize the data is the problem and that the vendor of the
product I am working with should not allow records with
duplicate invoice numbers, but I have to get the data loaded as
that is what they want and are paying for. So back to my View. I
was hoping to create a view and be able to work in the view to
remove duplicate records prior to writing them to a file. Any
suggestions are welcomed.
Thanks
-Pat

FindByKey with Composit Primary key

Hi
View Object based on Entity Object. Database table defined with Composit Primary Key.
I have to query ViewObject using findByKey().
Can any one help me how to use findByKey() using a composit primary key in ADF 11g.
Thanks

Hi,
this is covered in the developer guide here:
38.1.7 Understanding When You Can Use Partial Keys with findByKey()
http://download.oracle.com/docs/cd/E12839_01/web.1111/b31974/bcadvvo.htm#ADFFD1189
The key thing is to have your object types casted correctly or else null for your composite key.
Brenden

Create edit form based on view with multiple column key

Hi
I have a requirement to create a form to update some tables columns based on a view.
The problem is that the view has a primary key of 4 columns.
I have tried to create a rowid key based on one underlying table but this does not work.
I am calling the form from an interactive report but can only pass 3 keys to the form, so only get 3 fields populated.
Is there some way i can create the form manually as the wizards cannot cope with this requirement?
My view is here:
CREATE OR REPLACE FORCE VIEW "DMOADMIN"."MO_STATUS_LOG_VIEW" ("MONEY_ORD_NO", "STATUS_CODE", "DESCRIP", "STATUS_DATE_TIME", "TXN_DATE_TIME", "LLOG_ID", "LINE_SEQ_NO", "CANCEL_IND", "PROCESS_ID", "PBU_ID", "TXN_SEQ_NO", "CANCEL_REASON", "CONDITION_ID", "ADMIN_DATE_TIME", "ADMIN_LLOG_ID") AS
SELECT a.money_ord_no,
b.status_code,
b.descrip,
a.status_date_time,
c.txn_date_time,
c.llog_id,
c.line_seq_no,
c.cancel_ind,
c.process_id,
c.pbu_id,
c.txn_seq_no,
c.cancel_reason,
c.condition_id,
d.txn_date_time admin_date_time,
d.llog_id admin_llog_id
FROM mo_status a,
mo_status_desc b,
host_txn_log c,
host_admin_log d
WHERE a.status_desc_id = b.id
AND a.money_ord_no = c.money_ord_no(+)
AND a.status_date_time = c.txn_date_time(+)
AND a.money_ord_no = d.money_ord_no(+)
AND a.status_date_time = d.txn_date_time(+)
WITH CHECK OPTION;
I have tried to populate the data using with an on load process using a plsql query but it is not working. I get no data found error message. Help!

Hi Erwin,
I have a similar situation.
Tabular form based on a view. The view contains a table in a another instance via dblink and everything works fine.
The only one difference between my and your view is that my "instead of" view is only for UPDATE. You must to have "intead of" trigger only for UPDATE. Insert and delete works fine withoust "instead of" trigger.
So, try to delete INSERT and DELETE words from your "INSTEADOFBUBA" trigger.
hope it helps,
Mzz

Creating Materialized View with the Distinct key word

Hi
I need help to create Materialized View with the Distinct key word.
my query is
select distinct col1, col2 from t1;
is there any alternate of DISTINCT because I can not refresh the MV as fast on demand if I am using it and Fast on Demand is a must for me.

hi
check out this link
http://download-west.oracle.com/docs/cd/B12037_01/server.101/b10736/basicmv.htm#i1007299
http://download.oracle.com/docs/cd/B19306_01/server.102/b14220/intro.htm#sthref183
hope this helps
CHeers

Duplicate record with same primary key in Fact table

Hi all,
Can the fact table have duplicate record with same primary key . When i checked a cube i could see records with same primary key combination but the key figure values are different. My cube has 6 dimentions (Including Time,Unit and DP) and 2 key figures. So 6 fields combined to form the composite primary key of the fact table. When i checked the records in se16 i could see duplicate records with same primary key. Ther are no parallel loading happening for the cube.
BW system version is 3.1
Data base is : Oracle 10.2
I am not sure how is this possible.
Regards,
PM

Hi Krish,
I checked the datapacket dimention also. Both the record have same dimention id (141). Except the Keyfigure value there is no other change in the Fact table record. I know this is against the basic DBMS primary key rule. But i have records like this in the cube.
Can this situation arise when same records is there in different data packet of same request.
Thx,
PM
null

Insert values of form on a table with compound primary keys in APEX

Good evening,
I have a table with compoud primay keys. On ER model I had a many to many relation and when I coverted to relational model I've got a table with the primary keys of the two entities.
My problem now is that I am trying to build an APEX application with a Form/Report and I want to insert a tuple both on the "entity" and on the table with two primary keys.
I created a trigger with
CREATE OR REPLACE TRIGGER ins_key_elem
INSTEAD OF INSERT
ON v_key_elem
REFERENCING NEW AS NEW
FOR EACH ROW
BEGIN
INSERT INTO elem_type (elem_key, type_key)
VALUES (:NEW.elem_key, :NEW.type_key);
INSERT INTO elem(elem_key, name)
VALUES (:NEW.elem_key, :NEW.name);
END;
Is that ok? If it is, now how I can use that trigger to do what I need? i.e. insert the tuple on the two tables when I use the create button of the form
Edited by: 934530 on May 15, 2012 2:36 PM

Nevermind...figured it out. Was able to set the value on the Report Attributes page.

Updating a table with no Primary key

What I am trying to find out is if you can uniquely update a single record in a table that has no primary key. I see no way to reference the record I want, other than specifying all the field values in a where clause. This is a problem though, because if I have another record with the same field values, that will get updated too. (I know its a bad database design, but some people do it and I need to work around it!!!), there are some situations where you would have identical records as far as a where clause is concerned, for example, you cant use a blob in a where clause so that might be where your records differ...
In SQLServer 2000, Enterprise manager throws an error if you have a table with no primary key and duplicate records that you try to update through the GUI. EM uses stored procedures to execute updates, and it rolls back ones which result in more than one update result.
Im not too familiar with Cursors in SQL, only that they are quite slow and not implemented on all DB products. But I think that they might be able to solve the problem (but I dont logically see how).
Can anybody explain this to me?

another record with the same field valuesIf you have two records and all the field values are the same then the records are logically the same anyways, so it shouldn't matter if you update both (one would question why there are two records in the first place.) In other words there is no way, either computationally or manually to tell them apart.
I suspect that that is rather rare. Instead what is more likely is that you are only using some of the fields. So just keep adding fields until it is unique.

DBMS_CDC find only the columns that are changed along with the primary key in the table

Hello,
We are having a requirement to find the change data in the production environment.
We are planning to use the DBMS_CDC utility.
But for example in the create change table 1 picked emp_id,ename, address, salary,dob.
I have a sample data of
empid
ename
address
salary
DOB
1
test1
24 test street
2000
20-Jan-98
2
test2
25 test street
2500
15-Aug-97
if ename for empid 1 is changed to test1_test3 from test1.
My CDC is capturing the values in the old and new values in the 5 columns.
But i need to get only the empid (primary key of the source table) and the ename column as only that's been updated not the rest of the 3 columns.
Can i accomplish this.
Please advice.

Hello,
Thanks for the information.
but if i change the change table then i will miss the other columns right?
I want to get the columns( empid and ename) only if ename is changed. i.e when ever any column in emp table changes i need to get all the columns where the data is changed along with the primary key columns empid.
Is there any way i can tweak the parameters so that i can achieve this or is there any other way using the cdc i can get this data.
Thanks

2 tables with same primary key

Hi,
2 tables with same primary key is possible,but when is wise to go for such ?
is that a bad desisn ?
eg:
Personal_details_employee
Official_details_employee
these 2 tables have same Primary key emp_id.
plz. reply me at [email protected] also
thanx
vikram

hi Vikram,
In this case u can have then in one table itself and why do want to have two tables.
- Suresh.A

How to Work with Composite Primary Key

Hi All,
I'm working with Toplink JPA. Here I have A problem with inserting into database table which have composite Primary Key.
What I'm doing is, I have two tables. to maintain many to many relation between these two tables I created another intermediate table which consists of foreign Keys (reference) of above two tables.
Now these two foreign Keys in the Intermediate table made as composite Primary Keys.
When I'm trying to the data in the Intermediate table I'm getting the foreign Keys values are null..
could anyone suggest me how to work with composite Primary Keys
Thanks,
Satish

I have the same problem, I have 3 tables with a join table joining them all. I have created an intermediate table entity. When I go to create a an entry, it says that I cannot enter null into "ID". Here is the SQl toplink generates:
INSERT INTO Z_AUTH_USER_AUTHORIZATION (CONTEXT_ID, AUTHORIZATION_ID, USER_ID) VALUES (?, ?, ?)
bind => [null, null, null]
Here are the classes:
-----------------------Join Table-----------------------------------------------
@Entity()
@Table(name = "Z_AUTH_USER_AUTHORIZATION")
public class AuthUserAuthorization implements Serializable{
@EmbeddedId
private AuthUserAuthorizationPK compId;
// bi-directional many-to-one association to AuthAuthorization
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "AUTHORIZATION_ID", referencedColumnName = "ID", nullable = false, insertable = false, updatable = false)
private AuthAuthorization authAuthorization;
// bi-directional many-to-one association to AuthContext
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "CONTEXT_ID", referencedColumnName = "ID", nullable = false, insertable = false, updatable = false)
private AuthContext authContext;
// bi-directional many-to-one association to AuthUser
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "USER_ID", referencedColumnName = "ID", nullable = false, insertable = false, updatable = false)
private AuthUser authUser;
---------------------------------------User table--------------------------------------------------------------
@Entity()
@Table(name = "Z_AUTH_USER")
public class AuthUser implements Serializable, IUser{
@Id()
@SequenceGenerator(name = "AUTH_USER_ID_SEQ", sequenceName = "Z_AUTH_USER_ID_SEQ")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "AUTH_USER_ID_SEQ")
@Column(name = "ID", unique = true, nullable = false, precision = 10)
private Integer id;
// bi-directional many-to-one association to AuthUserAuthorization
@OneToMany(mappedBy = "authUser", fetch = FetchType.EAGER)
private java.util.Set<AuthUserAuthorization> authUserAuthorizations;
-----------------------------------Context table-----------------------------------------------------------------
@Entity()
@Table(name = "Z_AUTH_CONTEXT")
public class AuthContext implements Serializable, IContext{
@Id()
@SequenceGenerator(name = "AUTH_CONTEXT_ID_SEQ", sequenceName = "Z_AUTH_CONTEXT_ID_SEQ")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "AUTH_CONTEXT_ID_SEQ")
@Column(name = "ID", unique = true, nullable = false, precision = 8)
private Integer id;
// bi-directional many-to-one association to AuthUserAuthorization
@OneToMany(mappedBy = "authContext", fetch = FetchType.EAGER)
private java.util.Set<AuthUserAuthorization> authUserAuthorizations;
----------------------------Authorization table-------------------------------------------------
@Entity()
@Table(name = "Z_AUTH_AUTHORIZATION")
public class AuthAuthorization implements Serializable, IAuthorization{
@Id()
@SequenceGenerator(name = "AUTH_AUTHORIZATION_ID_SEQ", sequenceName = "Z_AUTH_AUTHORIZATION_ID_SEQ")
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "AUTH_AUTHORIZATION_ID_SEQ")
@Column(name = "ID", unique = true, nullable = false, precision = 8)
private Integer id;
// bi-directional many-to-one association to AuthUserAuthorization
@OneToMany(mappedBy = "authAuthorization", fetch = FetchType.EAGER)
private java.util.Set<AuthUserAuthorization> authUserAuthorizations;
I have tried to create the new entity several ways. I have tried to create one with the default constructor then set this entity on each of the other entities, I have also tried to pass in the entities to the join entity and set them there, but this doesn't work. Any help would be very appreciated!
Thanks,
Bill

Mapping tables with no primary key defined

Hi!
I was just wondering if it's possible to map a table with no primary key? The reason why is that I have a logging table that I want to access, which is built very simple and the only useful filtering criteria that I'll be using there is a date column.
Regards,
Bjorn Boe

TopLink requires that an object have a primary key to determine identity, perform caching, and database updates and deletes. It is best to define a primary key in all your objects; a sequence number can be used if the object has no natural primary key. The primary key does not have to be defined on the database, as long as a set of fields in the table are unique you can define them to be the primary key in your TopLink descriptor.
If your table truly has no primary key, nor unique set of fields, it is still possible to map the table with some restrictions. If you disable caching, and mark the object as read-only, and never update or delete the object, you can map it for read-only purposes.
You will need to do the following:
- Set any field as the primary key to avoid the validation warning.
- Set the cache type to NoIdentityMap.
- Set the descriptor to be read-only.

Problem with Sting Primary Key

I have probleme with Sting Primary Key
when i create new row
System.out.println("is new:" + acct.getEntityState());
show 1 - this row is not new
why?

Hi,
I was unable to reproduce this behavior on OWM 10.1.0.8. It appears that you have a SR open for this issue, so I would suggest to continue with that process.
Regards,
Ben

Problem with varchar2 primary key..

OWM version 10.1.0.8
When I am trying to add a column in a version enable table with varchar2 primary key, it fails.
If primary key is numeric it works.
See below the test case.
-- CASE 1. When primary key is number.
SQL> create table wmtab
( wmtab_id number,
price number,
title varchar2(80),
AUTHOR VARCHAR2(10)
Table created.
SQL> ALTER TABLE wmtab add (CONSTRAINT PK_kontakt PRIMARY KEY (wmtab_id));
Table altered.
SQL> EXECUTE DBMS_WM.EnableVersioning('WMTAB');
PL/SQL procedure successfully completed.
SQL> CALL DBMS_WM.BEGINDDL('WMTAB');
Call completed.
SQL> ALTER TABLE wmtab_lts add ( FREIGEGEBEN varchar2(1));
Table altered.
SQL> CALL DBMS_WM.commitDDL('WMTAB');
Call completed.
-- CASE 2. When primary key is varchar2.
SQL> create table wmtab
(wmtab_id varchar2(10) constraint wmtab_pk primary key,
price number,
title varchar2(80),
AUTHOR VARCHAR2(10)
Table created.
SQL> EXECUTE DBMS_WM.EnableVersioning('WMTAB');
PL/SQL procedure successfully completed.
SQL> CALL DBMS_WM.BEGINDDL('WMTAB');
Call completed.
SQL> ALTER TABLE wmtab_lts add ( FREIGEGEBEN varchar2(1));
Table altered.
SQL> call DBMS_WM.CommitDDL('wmtab');
call DBMS_WM.CommitDDL('wmtab')
ERROR at line 1:
ORA-20199: primary key columns cannot be added/dropped/modified/reordered for
version enabled tables
ORA-06512: at "SYS.OWM_DDL_PKG", line 6196
ORA-06512: at "SYS.LT", line 11930
ORA-06512: at line 1
Same problem is reprosucible on OWM 10.2.0.1.
But its working fine with varchar2 primary key On OWM 10.2.0.4.2/3
Is there any workaround or we can get patch for 10.1.x.x?

Hi,
I was unable to reproduce this behavior on OWM 10.1.0.8. It appears that you have a SR open for this issue, so I would suggest to continue with that process.
Regards,
Ben

How to do hibernate mapping for table or view without a primary key

Hi,
Anyone knows how to do hibernate mapping for table or view without a primary key?
thanks.
cc

or you can make all column primary key .Anybody seriously considering that as a good idea should understand the implications:
1. this requires that each row be unique - that's a minor issue normally, but can be a significant problem in some cases
2. in practically all databases, a primary key constraint creates a unique index - this has many implications:
a) in most databases, the index stores a copy of the column data that is indexed - this suggestion therefore more than doubles the data storage required for the data
b) whenever an indexed column is changed, the index has to be maintained - this suggestion then more than doubles the work that each UPDATE statement has to do, since both the table and the index have to be maintained for any UPDATE at all
This might work OK for toy projects, but it doesn't scale well at all...

EF beta - views with no primary key

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