In which case composite primary key allows NULL values in it

Hi to all
In what case composite primary key allows nulls in it.
Let us suppose, I created a composite primary key with 2 attributes.
CREATE TABLE sample
BNK_Id NUMBER(6),
BNK_Name VARCHAR2(20),
CONSTRAINT BNK_Id_Name_PK PRIMARY KEY(BNK_Id,BNK_Name)
When it allows null values in it.
thanks in advance

Are you sure that your instructor was not talking about unique keys? As Solomon said, a primary key always implies not null on all of the columns of the PK. However a unique key does not automatically imply not null, and can have nulls in a column as long as the values in the populated columns are unique.
SQL> create table test (
2     id number,
3     pid number,
4     descr varchar2(10));
Table created.
SQL> alter table test add constraint test_unq
2     unique (id, pid);
Table altered.
SQL> insert into test values (1, null, 'desc1');
1 row created.
SQL> insert into test values (2, null, 'desc2');
1 row created.
SQL> insert into test values (2, null, 'fail1');
insert into test values (2, null, 'fail1')
ERROR at line 1:
ORA-00001: unique constraint (OPS$ORACLE.TEST_UNQ) violatedJohn

Similar Messages

Null in Composite Primary Key and "Primary keys must not contain null"

Hello all.
I'm a newbie concerning to JPA/EJB3, but I was wondering if toplinks doesn't support composite primary keys with null in some field (something perfectly right in any RDBMS).
I used JDeveloper (I'm using Oracle 10g database and JDeveloper 10.1.3.2.) wizards to generate JPA classes and I checked out generated files (with annotations), so they should be right (by the way, other O-R mappings for my model are working right, but this one).
I'm getting the next error:
Exception Description: The primary key read from the row [DatabaseRecord(
     TSUBGRUPOSLDI.CD_GRUP => 01
     TSUBGRUPOSLDI.CD_SUBGRUP => null
     TSUBGRUPOSLDI.CG_POBL => 058
     TSUBGRUPOSLDI.CG_PROV => 28
     TSUBGRUPOSLDI.DSCR => Sanidad)] during the execution of the query was detected to be null. Primary keys must not contain null.
Compound primary key is (CD_GRUP, CD_SUBGRUP). No foreign keys, no joins (only a NamedQuery: "select o from ..."). It's the simplest case!
I checked out that everything runs ok if there's no "null" value in CD_SUBGRUP.
After some research (this and other forums) I'm beginning to believe that it's not supported, but not sure.
Am I doing sth wrong? If not, what is the reason to not support this? Will it be supported in the future?
Thanks in advance.

Null is a special value and in many databases is not comparable to another null value (hence the isNull operator) and may pose problems when used to uniquely identify an Entity. TopLink does not support null values within a composite PK. As the nullable column is most likely not designated as a PK within your database table (many databases do not allow this) I recommend updating the Entity PKs to match that of the database.
--Gordon

Deployment Tool Problem (J2EE -Composite primary Key Class)

Hi !!
e.g. I have an entiybean which has composite primary key class. So while deploying in J2EE tool u need to specify the Primary key class and the primary key field. well in case of a composite primary key class(if u have more than one field)...how do u declare all the fields for primary key class....
if u r not getting me please tell me... See in J2EE deployment tool there is on section called Entity..in that see the Primary Key class (there u specify the Primary key class) and the Primary Key Field Name (the field name) Here u can just give only one Field name..if you have mulitple fields, then where you will specify... Please let me know..
if anybody wants the code I will give the code...Please try to help..(how to deploy this kind of entity bean in J2EE deployment tool)
-Bhumika

Hi Bhumika,
in case you have more than one field you need to write a Primary key class where the fields you want to be the key are member variables.
your p.key class could look like this (it has to implement hash() and equals() ):
public class PersonPK implements java.io.Serializable
public int person_ID;
public PersonPK()
public PersonPK(int aPersonId)
person_ID = aPersonId;
public int hashCode()
return person_ID;
public boolean equals(Object ob)
if (ob == this) return true;
if (!(ob instanceof PersonPK)) return false;
PersonPK other = (PersonPK) ob;
if (person_ID != other.person_ID) return false;
return true;
-Hope this helps a bit,
Anke

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

Update enrolled table which has 6 composite primary key

Hi Everyone,
I am trying to update a grade column in table called enrolled which has 6 composite primary key column including SID, TERMYEAR, FACCODE, DEPCODE, COURSENO, SECNO and 2 extra column including GRADE, IDD all of them are of type VARCHAR2 as describe below:
To update this table I used the command below:
UPDATE enrolled
SET grade = :COURSE_BLOCK.GRADE_TEXT
WHERE IID = :GLOBAL.logUserid
AND SID = :COURSE_BLOCK.SID_TEXT
AND FACCODE = :COURSE_BLOCK.FACULTY_TEXT
AND DEPCODE = :COURSE_BLOCK.DEPARTMENT_TEXT
AND COURSENO = :COURSE_BLOCK.COURSE_TEXT
AND SECNO = :COURSE_BLOCK.SECTION_TEXT;
Note: the :GLOBAL.logUserid is a global variable that I assigned the user id when the user log on to the application.
When I run the application and fill out the form in order to update the table this doesn't update the table and if I use SQL*PLUS as well with the values that I use for the form to update the table I get message: o rows updated
Can Someone help please?

Here is the solution.
The problem:
The problem was that the enrolled table was designed in a way that a student can enrolled in the lecture(LEC type column) and Laboratory(LAB type column). When a student is given a grade, it is given a grade for the course 100 (eg: 03-60-100) this course has a lecture and lab. this course belong to the faculty code 03(science) department 60 (computer Science) so when a student register to a course, will register to a lecture and a lab but he will receive a grade for the course 100 lec in this case Oracle couldn't update the table because there was two column with course 100 for that particular student Id
The solution:
There are many solution I believe but my quickest solution is when a student register to the course by default is given a grade 'I' means Incomplete then when the instructor add the grade, he can just update a grade from incomplete to the final grade (eg A) now the code will be to get only the course 100 that has grade and discard that doesn't have grade this means that I need only to make sure that the WHERE Clause grade is not null shown below.
UPDATE enrolled
SET grade = BLOCK_NAME.FIELD_NAME
WHERE grade IS NOY NULL
AND IID = BLOCK_NAME.FIELD
AND faccode = BLOCK_NAME.FIELD
AND depcode = BLOCK_NAME.FIELD
AND courseno= BLOCK_NAME.FIELD_NAME
NAD secno = BLOCK_NAME.FIELD_NAME
AND SID = BLOCK_NAME.FIELD_NAME

Can a composite primary key column be null

Hi All,
It will be a silly question but still I would like to ask can a composite primary key column be null?
Thanks,
Rafi.

Rafi,
Why you think it would be allowed?
SQL> drop table test purge;
drop table test purge
ERROR at line 1:
ORA-00942: table or view does not exist
SQL> create table test as select * from dba_objects;
Table created.
SQL> alter table test add primary key(object_id, owner);
Table altered.
SQL> insert into test(object_id, owner) values(null, 'aman');
insert into test(object_id, owner) values(null, 'aman')
ERROR at line 1:
ORA-01400: cannot insert NULL into ("SYS"."TEST"."OBJECT_ID")
SQL> insert into test(object_id, owner) values(1,null);
insert into test(object_id, owner) values(1,null)
ERROR at line 1:
ORA-01400: cannot insert NULL into ("SYS"."TEST"."OWNER")
SQL>HTH
Aman....

Null value in Composite Primary key

Hi,
I have a requirement where I need to identify each record based on 4 columns. I though that I could achieve the same by imposing a composite primary key based on all the 4 columns. But any one of the column can be null at anytime. Can I still impose a composite primary key? i.e., if I create a composite primary key based on 4 columns, can any one of the column be null?
Your help would be more appreciated.

No, you can't
By definition a Primary Key is NOT NULL
SQL> drop table t
2 /
Table dropped.
Elapsed: 00:00:00.03
SQL>
SQL> create table t
2 (col1 number null
3 ,col2 number null
4 ,col3 number null
5 ,col4 number null
6 ,constraint tpk primary key (col1, col2, col3, col4)
7 )
8 /
Table created.
Elapsed: 00:00:00.03
SQL>
SQL> desc t
Name                                                              Null?    Type
COL1                                                              NOT NULL NUMBER
COL2                                                              NOT NULL NUMBER
COL3                                                              NOT NULL NUMBER
COL4                                                              NOT NULL NUMBER
SQL>

Master Detail Forms with 2 composite primary keys - Is there a workaround?

Hello All,
I have been searching for a workaround to the maximum 2 part primary key restriction on the multi-row updates, and master-detail forms, and am hoping that someone can help me. I am using HTMLDB v2.0.0.00.49 with IE 6 against a 9.2 DB.
I successfully implemented the workaround of Fred Stoopendaal's (see Updata PK on HTML DB ) and it works fine for single page multi-record updateable forms, but alas I haven't been able to extend it to master detail forms (I think it is something to do with Oracle not allowing the "returning" clause on views).
Here is what I tried:
two tables, one with a 2 part composite primary key, which is the master table, and a detail table with 3 part composite primary key -
--------- BEGIN SQL ---------
create table master_table
( master_col1 number
, master_col2 number
, master_col3 varchar2(30)
, constraint master_pk primary key (master_col1,master_col2));
create table detail_table
(detail_col1 number
,detail_col2 number
,detail_col3 number
,detail_col4 varchar2(30)
, constraint detail_pk primary key(detail_col1,detail_col2,detail_col3)
, constraint master_detail_fk foreign key (detail_col1,detail_col2) references master_table(master_col1,master_col2));
create or replace view v_master_table as
select rowid mata_rowid,mata.*
from master_table mata;
create or replace view v_detail_table as
select rowid deta_rowid,
(select rowid from master_table mata where mata.master_col1 = deta.detail_col1 and mata.master_col2 = deta.detail_col2) deta_mata_rowid
, deta.*
from detail_table deta;
create or replace trigger mata_ins_upd_trg
instead of insert or update on v_master_table
referencing new as new old as old
for each row
begin
if inserting then
insert into master_table (master_col1, master_col2, master_col3)
values (:new.master_col1, :new.master_col2, :new.master_col3);
end if;
if updating then
update master_table
set master_col1 = :new.master_col1,
master_col2 = :new.master_col2,
master_col3 = :new.master_col3
where rowid = :old.mata_rowid;
end if;
end;
create or replace trigger deta_ins_upd_trg
instead of insert or update on v_detail_table
referencing new as new old as old
for each row
begin
if inserting then
insert into detail_table ( detail_col1, detail_col2, detail_col3, detail_col4)
values (:new.detail_col1, :new.detail_col2, :new.detail_col3, :new.detail_col4);
end if;
if updating then
update detail_table
set detail_col1 = :new.detail_col1,
detail_col2 = :new.detail_col2,
detail_col3 = :new.detail_col3,
detail_col4 = :new.detail_col4
where rowid = :old.deta_rowid;
end if;
end;
--------- END SQL ---------
Then I created a master-detail form in Apex on the two views, using the mata_rowid and deta_rowid as primary keys, and mata_rowid=deta_mata_rowid as the link. I realise that using a function to fetch the master rowid within the detail view query is costly, but it was my intention to modify the record fetch queries to use the real FK columns once things were up and running.
It seems to generate the pages ok, and I can insert/update master table records, but as soon as I modify records in the detail table things go a bit haywire. I can't find any documentation on how the inbuilt MRU/MRD logic works, so can't figure out the issue.
Can anyone out there tell me what the problem is with the logic above, or if they have come up with a neat solution to this annoying limitation. I know that many will say that I should modify the data model to use surrogate primary keys, but many of the uses for HTMLDB are new interfaces for old schemas, so a workaround that doesn't involve wholesale data model changes would be preferable.
Thanks in advance,
Mike Cretan

Hi, this is likely not the most elegant way...but perhaps the simplest -- and I didn't have much time to play.
I used Wizard to create two separate Master Detail forms, each with a separate detail table. Thus I ended up with four pages:
Page "A" - "Selector" page for Master (Report), with Edit link driving to Detail-1
Page "B" - Editable Master/Detail-1 page (HTML / Report)
Page "C" - "Selector" page for Master (Report), with Edit link driving to Detail-2
Page "D" - Editable Master/Detail-2 page (HTML / Report)
Then I selected the primary key column TWICE on the Report on Page A. Modified the second instance of this column to navigate to Page D (passing primary key) exactly the way the original instance of this column navigates to Page B. Then I deleted Page C.
Since you can have only one Tabular Entry form per page, this seemed the best way to drive two separate detail tables from a common interface.

How to persist an entity with Composite primary key

Problem Statement:-
Entity A have many to one relation with Entity C
Entity B have many to one relation with Entity C
Entity C have a composite primary key of (Entity A PK & Entity B PK)
A --< C
B --< C
the entites are automatic generated by Dali tool
@Entity
public class C implements Serializable
     @EmbeddedId
     private C.PK pk;
     private int attribute;
     //Code
     @Embeddable
     public static class PK implements Serializable
          public int A_Id;
          public int B_Id;
          //Code
@Entity
public class A implements Serializable
     @Id
     private int AId;
     @OneToMany
     private Set<C> C_Collection;
     //Code
@Entity
public class B implements Serializable
     @Id
     private int BId;
     @OneToMany
     private Set<C> C_Collection;
     //Code
i made a session Bean which add a new entity C
Session
     A a = em.find(A.class, AId);
     B b = em.find(B.class, BId);
     C c = new C();
     C.PK pk = new C.PK();
     pk.AId(a.getID());
     pk.BId(b.getID());
     c.setPk(pk);
     c.setA(a);
     c.setB(b);
     c.setAttribute(12);
     em.persist(c);
when running this code an exception is raised
Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2006.8 (Build 060830)): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: Unknown column 'A_ID' in 'field list'Error Code: 1054
Call:INSERT INTO C (attribute, Aid, A_ID, B_ID, Bid) VALUES (?, ?, ?, ?, ?)
     bind => [2, 6, 6, 1, 1]
this is logic as Table "C" has only 3 coloumns only "attribute" , "Aid" , "Bid"
but the mapping is different as it adds the composite PK attributes to the insert statement
if there is a sample code or how to solve this issue it would be great

Hello Juwen,
The problem is you are registering an object, assigning it a null pk, and then commiting the uow/transaction. TopLink uses registered objects to keep track of changes you make inorder to persist those changes on commit. So the simple fix is to not commit the UnitOfWork - call release() on it instead.
Another solution is to use the session copyObject api. The simple form that only takes an object will work similar to registering the object as it will copy all persistent attributes but it will leave the primary key null. You can also use this method to specify a copyPolicy to customize the process. Using this method will be a bit more efficient, since a UOW makes both a working copy and a back up copy of objects registered, inorder to keep track of changes. Using the copyObject api will only make a single copy.
Best Regards,
Chris

OC4J 9.0.4 Deadlock: CMR with composite primary key

Hi,
I just encountered a Deadlock in a CMR/CMP application involving a session bean and two entity beans, one of which (Item) has a composite primary key, comprising a foreign key to the second entity bean. The exception is thrown after ejbPostCreate() completes succesfully and the new row is committed to the ITEM table. I have provided the trace (verbosity = 10) below. The EJB Dev Guide does not offer too much detail on Deadlock conditions, so any input and suggestions are most welcome.
regards and thanks
George
javax.ejb.EJBException: Deadlock detected: thread 8 thread 8state
= thread 8
id = 8
thread = RMICallHandler-5
user = [JAZNUserAdaptor: user=jazn.com/admin]
runAsUser = null
waitingState = null
waitingForState = thread 8
waitingForResource = Item server.ItemPK@bdc9b3
notified = false
interruptMessage = null
rmiHandler = com.evermind.server.rmi.RMICallHandler@97617
cmtConnections = null
cmtConnectionCount = 0
inDataSourceSensitiveRegion = false
applicationThread.httpHandler = null
contextContainer = OrderSB EJBHome
transaction = null
is waiting for resource entity Item server.ItemPK@bdc9b3 held by thread 8 thread 8state
= thread 8
id = 8
thread = RMICallHandler-5
user = [JAZNUserAdaptor: user=jazn.com/admin]
runAsUser = null
waitingState = null
waitingForState = thread 8
waitingForResource = Item server.ItemPK@bdc9b3
notified = false
interruptMessage = null
rmiHandler = com.evermind.server.rmi.RMICallHandler@97617
cmtConnections = null
cmtConnectionCount = 0
inDataSourceSensitiveRegion = false
applicationThread.httpHandler = null
contextContainer = OrderSB EJBHome
transaction = null
at com.evermind.server.ejb.AbstractEJBObject.startCallLocal(AbstractEJBObject.java:110)
at ItemLocal_EntityBeanWrapper18.setNomen(ItemLocal_EntityBeanWrapper18.java:1912)
at server.OrderSBBean.addItems(OrderSBBean.java:380)
at OrderSB_StatelessSessionBeanWrapper2.addItems(OrderSB_StatelessSessionBeanWrapper2.java:1983)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:124)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:48)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
at java.lang.Thread.run(Thread.java:536)

Hi,
I just encountered a Deadlock in a CMR/CMP application involving a session bean and two entity beans, one of which (Item) has a composite primary key, comprising a foreign key to the second entity bean. The exception is thrown after ejbPostCreate() completes succesfully and the new row is committed to the ITEM table. I have provided the trace (verbosity = 10) below. The EJB Dev Guide does not offer too much detail on Deadlock conditions, so any input and suggestions are most welcome.
regards and thanks
George
javax.ejb.EJBException: Deadlock detected: thread 8 thread 8state
= thread 8
id = 8
thread = RMICallHandler-5
user = [JAZNUserAdaptor: user=jazn.com/admin]
runAsUser = null
waitingState = null
waitingForState = thread 8
waitingForResource = Item server.ItemPK@bdc9b3
notified = false
interruptMessage = null
rmiHandler = com.evermind.server.rmi.RMICallHandler@97617
cmtConnections = null
cmtConnectionCount = 0
inDataSourceSensitiveRegion = false
applicationThread.httpHandler = null
contextContainer = OrderSB EJBHome
transaction = null
is waiting for resource entity Item server.ItemPK@bdc9b3 held by thread 8 thread 8state
= thread 8
id = 8
thread = RMICallHandler-5
user = [JAZNUserAdaptor: user=jazn.com/admin]
runAsUser = null
waitingState = null
waitingForState = thread 8
waitingForResource = Item server.ItemPK@bdc9b3
notified = false
interruptMessage = null
rmiHandler = com.evermind.server.rmi.RMICallHandler@97617
cmtConnections = null
cmtConnectionCount = 0
inDataSourceSensitiveRegion = false
applicationThread.httpHandler = null
contextContainer = OrderSB EJBHome
transaction = null
at com.evermind.server.ejb.AbstractEJBObject.startCallLocal(AbstractEJBObject.java:110)
at ItemLocal_EntityBeanWrapper18.setNomen(ItemLocal_EntityBeanWrapper18.java:1912)
at server.OrderSBBean.addItems(OrderSBBean.java:380)
at OrderSB_StatelessSessionBeanWrapper2.addItems(OrderSB_StatelessSessionBeanWrapper2.java:1983)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:124)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:48)
at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
at java.lang.Thread.run(Thread.java:536)

Error While Deploying A CMP Entity Bean With A Composite Primary Key

Hello all,
I have a problem deploying CMP Entity beans with composite primary keys. I have a CMP Entity Bean, which contains a composite primary key composed of two local stubs. If you know more about this please respond to my post on the EJB forum (subject: CMP Bean Local Stub as a Field of a Primary Key Class).
In the mean time, can you please tell me what following error message means and how to resolve it? From what I understand it might be a problem with Sun ONE AS 7, but I would like to make sure it's not me doing something wrong.
[05/Jan/2005:12:49:03] WARNING ( 1896):      Validation error in bean CustomerSubscription: The type of non-static field customer of the key class
test.subscription.CustomerSubscriptionCMP_1530383317_JDOState$Oid must be primitive or must implement java.io.Serializable.
     Update the type of the key class field.
     Warning: All primary key columns in primary table CustomerSubscription of the bean corresponding to the generated class test.subscription.CustomerSubscriptionCMP_1530383317_JDOState must be mapped to key fields.
     Map the following primary key columns to key fields: CustomerSubscription.CustomerEmail,CustomerSubscription.SubscriptionType. If you already have fields mapped to these columns, verify that they are key fields.Is it enough that a primary key class be serializable or all fields have to implement Serializable or be a primitive?
Please let me know if you need more information to answer my question.
Thanks.
Nikola

Hi Nikola,
There are several problems with your CMP bean.
1. Fields of a Primary Key Class must be a subset of CMP fields, so yes, they must be either a primitive or a Serializable type.
2. Sun Application Server does not support Primary Key fields of an arbitrary Serializable type (i.e. those that will be stored
as BLOB in the database), but only primitives, Java wrappers, String, and Date/Time types.
Do you try to use stubs instead of relationships or for some other reason?
If it's the former - look at the CMR fields.
If it's the latter, I suggest to store these fields as regular CMP fields and use some other value as the PK. If you prefer that
the CMP container generates the PK values, use the Unknown
PrimaryKey feature.
Regards,
-marina

Composite Primary Key Error

I am using Sun One App Server PE8.
I have a class with a composite primary key field. When I place the following method in my Home interface:
public MyEjb findByPrimaryKey(MyEjbPrimaryKey pk) throws FinderException, RemoteException;I get the following error when deploying:
ejbFindByPrimaryKey(EjbPrimaryKey) is already defined in MyEjb1368202910_ConcreteImpl
    public MyEjbPrimaryKey ejbFindByPrimaryKey (MyEjbPrimaryKey key)However, If i remove this method from the Home interface, i get the following error when running the verification tool:
Error: No single arg findByPrimaryKey(PrimaryKeyClass) method was found in home interface class [ MyEjb ].However, I can still deploy the EAR successfully.
Another related symptom of this problem, is if I include the following method in my Home interface:
public MyEjb findByPrimaryKey(String pkField1, String pkField2) throws FinderException, RemoteException;And call this method, I get the following exception at runtime:
java.rmi.RemoteException: Bean class for ejb [MyEjb] does not define a method corresponding to [Home] interface method [public abstract MyEjb MyEjbHome.findByPrimaryKey(java.lang.String,java
.lang.String) throws javax.ejb.FinderException,java.rmi.RemoteException]I get these same problems with all EJB's that use composite keys. Has anyone else had this problem?
Thanks
toby

This is a CMP bean, with no ejbFindByPrimaryKey in the Bean class. Below, i have included the Home interface and the Bean class (with unneccessary code removed)
Thanks for looking at this for me.
BEAN CLASS
package lands.mc.bus.prod;
import java.rmi.*;
import java.util.*;
import javax.ejb.*;
public abstract class TopoMapBean implements EntityBean
private EntityContext entity;
public TopoMapBean()
public void setEntityContext(EntityContext ctx)
    entity = ctx;
public void unsetEntityContext()
    entity = null;
public TopoMapPrimaryKey ejbCreate(String mapName, String mapNumber, String mnemonic,String edition, String scale)
throws CreateException
    // call setters...
    return null;
public void ejbPostCreate( String mapName,
                                               String mapNumber,
                                         String mnemonic,
                                         String edition,
                                         String scale )
removed set/get methods
public void ejbStore() {}
public void ejbLoad() {}
public void ejbActivate() {}
public void ejbPassivate() {}
public void ejbRemove() {}
}HOME INTERFACE
package lands.mc.bus.prod;
import java.rmi.*;
import java.util.*;
import javax.ejb.*;
public interface TopoMapHome extends EJBHome
public TopoMap create(String mapName,
                        String mapNumber,
                        String mnemonic,
                        String edition,
                        String scale
throws CreateException, RemoteException;
public TopoMap findByPrimaryKey(String mapNumber, String edition) throws FinderException, RemoteException;
// doesnt deploy with this signature
// public TopoMap findByPrimaryKey(TopoMapPrimaryKey pkey) throws FinderException;
// have to use this method instead of findByPrimaryKey(String, String) above
public TopoMap findTopoMap(String mapNumber, String edition) throws FinderException, RemoteException;

Querying on the basis of some attribute of composite primary key

Hello,
I am looking for suggestion about querying just on the basis of one attribute of the composite primary key.
TO exemplify,
I have a 6 attributes example A1,A2,A3,A4,A5,A6.
A1,A2 and A3 together, serve as composite primary key.Now,because of the need of the project,I want to do querying on the basis of any A1,A2 or A3.One way I could think of is to have secondary indices on each of A1,A2,A3.
Can some one explain me roughly how to go about it?
I am a new user of BerkeleyDB Java Edition,hence not sure what would be a good way to do it.I understand one way to do it,would be to keep A1,A2,A3 in the Key class and A1,A2,A3,A4,A5,A6 in the value class as well.Then create secondary indices on the A1,A2 and A3 individually.
Can someone suggest a more efficient way?
Thanks,
Will appreciate any suggestions.
Prateek

Exactly as you said. Create secondary indices on each attribute you want to index off of. I don't use the Java interface, but what you pretty much need to do is form your secondary key like so:
skey: pkey_individual_attribute
skeysize: pkey_individual_attribute_sizeHow to do this is documented in the BDB Java API docs:
For example:
    class MyKeyCreator implements SecondaryKeyCreator {
        public boolean createSecondaryKey(SecondaryDatabase secondary,
                                            DatabaseEntry key,
                                            DatabaseEntry data,
                                            DatabaseEntry result)
            throws DatabaseException {
            // DO HERE: Extract the secondary key from the primary key and
            // data, and set the secondary key into the result parameter.
            return true;
    SecondaryConfig secConfig = new SecondaryConfig();
    secConfig.setKeyCreator(new MyKeyCreator());
    // Now pass secConfig to Environment.openSecondaryDatabaseThe extractor function used to construct the secondary index is passed the primary key and primary data - therefore all the data is available to you with no need to duplicate the key within the data itself. While the standard example is to use some part of the primary data to form a secondary key - there's absolutely nothing against using only a part of the primary key to form a secondary key instead. The only thing you have to do is slice up said primary key and construct the "result" parameter to be a single attribute. The backend API already knows which composite key this secondary entry will be associated with and as such will implicitly form the data (or as you called it "value") section of the index (which will be the composite primary key passed to it).
The primary key/data should consist of the composite A1,A2,A3 with only A4,A5,A6 as data.
The secondary->get() call (within the Java API) takes a key and provides back the primary key and primary data (basically the same as the db->pget() call in the C API). Since you've already indexed individual attributes, based off of the composite key, into their own respective databases - you just query from one of your secondary indexes with whatever specific attribute as the key. You then use the filled in primary key and primary data to work off of.

Urgent - ESB: DB Adapter with composite primary keys no returning any data

I have a DB Adapter in the ESB that inserts/updates/selects data to/from a table with 2 columns as primary keys, but table has several columns.
1. Initially, the db table had constraints for the composite primary key, The DB adapter had valid data coming in, but no result data.
2. Then I removed the db constraints on the composite primary key, and selected the 2 columns in the DB adapter wizard. Still, valid data is going in, since I am outputing to a file prior to call this node, but no result data is appearing. The result XML is empty.
Do I need to do something in Toplink for this?
The table spec is below. the ACCT_FIELD and ACCT_CODE columns make up the composite primary key.
CREATE TABLE AFF_DATA_SYNC
ACCT_FIELD NUMBER NOT NULL,
ACCT_CODE VARCHAR2(16) NOT NULL,
ACCT_EXISTS_FLAG VARCHAR2(1),
SAVE_ACCT_SEG_XML CLOB,
LAST_UPDATE_DATE DATE
The following xml is the request to the DB adapter:
<top:AffDataSyncReadDBAdapterSelect_accountField_accountCodeInputParameters xmlns:top="http://xmlns.oracle.com/pcbpel/adapter/db/top/AffDataSyncReadDBAdapter">
<top:accountField>8</top:accountField>
<top:accountCode>0003888</top:accountCode>
</top:AffDataSyncReadDBAdapterSelect_accountField_accountCodeInputParameters>
Log output:
JCA: esb:///ESB_Projects/STRIPES-AFF-Data-Intg_AFF-Data-Integration/AffDataSyncReadDBAdapter.wsdl [ AffDataSyncReadDBAdapter_ptt::AffDataSyncReadDBAdapterSelect_accountField_accountCode(AffDataSyncReadDBAdapterSelect_accountField_accountCode_inparameters,Af
DataSyncWipCollection) ] - No XMLRecord headers provided
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> Executing query with arguments [8, 0003917]
JCA: <oracle.tip.adapter.db.TopLinkLogger log> SELECT ACCT_FIELD, ACCT_CODE, ACCT_EXISTS_FLAG, SAVE_ACCT_SEG_XML, LAST_UPDATE_DATE FROM
AFF_DATA_SYNC_WIP WHERE ((ACCT_FIELD = ?) AND (ACCT_CODE = ?))
bind => [8, 0003888]
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> Read the following objects: []
Message was edited by:
user589357
Message was edited by:
user589357
Message was edited by:
user589357
Message was edited by:
user589357

The Toplink has no errors. Now I changed my table with only a single primary key, but for some reason, I am still getting no data.
JDeveloper 10.1.3.3 / SOA Suite (only using ESB) 10.1.3.3 with Oracle DB 10g 10.2.0.3.
1. What does No XMLRecord headers found mean?
2. Notice the last log item; Read ... []
Here are the log contents:
Invoking next service "AffDataSyncReadDBAdapterSelect_recordId" with payload :
<top:AffDataSyncReadDBAdapterSelect_recordIdInputParameters xmlns:top="http://xmlns.oracle.com/pcbpel/adapter/db/top/AffDataSyncReadDBAdapter">
<top:recordId>80003888</top:recordId>
</top:AffDataSyncReadDBAdapterSelect_recordIdInputParameters>
JCA: esb:///ESB_Projects/STRIPES-AFF-Data-Intg_AFF-Data-Integration/AffDataSyncReadDBAdapter.wsdl [ AffDataSyncReadDBAdapter_ptt::AffDataSyncReadDBAdapterSelect_recordId(AffDataSyncReadDBAdapterSelect_recordId_inparameters,AffDataSyncWipCollection)
] - No XMLRecord headers provided
JCA: esb:///ESB_Projects/STRIPES-AFF-Data-Intg_AFF-Data-Integration/AffDataSyncReadDBAdapter.wsdl [ AffDataSyncReadDBAdapter_ptt::AffDataSyncReadDBAdapterSelect_recordId(AffDataSyncReadDBAdapterSelect_recordId_inparameters,AffDataSyncWipCollection)
] - Starting JCA LocalTransaction
JCA: esb:///ESB_Projects/STRIPES-AFF-Data-Intg_AFF-Data-Integration/AffDataSyncReadDBAdapter.wsdl [ AffDataSyncReadDBAdapter_ptt::AffDataSyncReadDBAdapterSelect_recordId(AffDataSyncReadDBAdapterSelect_recordId_inparameters,AffDataSyncWipCollection)
] - Invoking JCA Outbound Interaction
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> executing the NamedQuery: AffDataSyncReadDBAdapter.AffDataSyncWip.AffDataSyncReadDBAdapterSelect
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> Parsing header record element.
JCA: <oracle.tip.adapter.db.TopLinkLogger log> client acquired
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> Executing query with arguments [80003888]
JCA: <oracle.tip.adapter.db.TopLinkLogger log> SELECT RECORD_ID, ACCT_FIELD, ACCT_CODE, ACCT_EXISTS_FLAG, SAVE_ACCT_SEG_XML, LAST_UPDATE_DATE
FROM AFF_DATA_SYNC_WIP WHERE (RECORD_ID = ?)
bind => [80003888]
JCA: <oracle.tip.adapter.db.DBInteraction executeOutboundRead> Read the following objects: []
Message was edited by:
user589357
Message was edited by:
user589357

Composite Primary Key

Hi,
I have few tables which had primary key on one column A, I made it composite primary key by adding one more column B at 2nd position. I made this change in all the tables. When I ran few SQLs to check the performance I found that explain plan shows full table scan on few tables which was not showing eariler (before composite PK). The SQL has outer join between these tables on column A (1st position in composite PK index). Is there anything I need to look into?
I'm using Oracle 10.2.0.5.0.
Thanks

Onkar Talekar wrote:
I guess you are talking about the same table in this thread: [url:https://forums.oracle.com/forums/thread.jspa?threadID=2372871&start=0&tstart=0]Primary Key modification
Yes. thats right.
If it is the same post, could you post current structure of the table plus what is recommended in the FAQ to post for performance issues?
Have you replaced your primary key from PARENT_ID to a composite primary key (PARENT_ID, PT_TIME)?
What was the reason for that?
Did you have any need to insert the same key (PARENT_ID) with different PT_TIME?
What is the benefit you expected creating this index?
What did you mean with "contention" that is happening on this primary key/index? Someone using the same primary key?
How is the PARENT_ID generated?
At a first look I did not see the need of replacing your primary key, as Tubby advised in your previous post. Adding a column to solve contention added additional trouble to you on performance side.
Regards.
Al.

In which case composite primary key allows NULL values in it

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