Update foreign key in target

Hello,
My interface has a Sql Server source datastore and an XML target datastore.
I woud like to create a sequence of values (0,1,2,3...) for the foreign key in the target. This foreign key is missing in the source datastore, hence, it cannot be mapped.
I'm unsure about the correct way of solving this issue.
Any help will be much appreciated...

Ned Epstein wrote:
It makes sense for the trigger logic to assign the foreign key column trans_request_id in the table lsu_trans_resources_t with the value of the primary key from the parent table.Why?
Personally I disagree, and think this does not make sense. How can a trigger on the child table know under which parent key the child should be inserted? Magic?
Of course you can make some assumptions, such as: child rows are always inserted inside the same transaction that a parent row was inserted. In which case you could refer to parent_seq.currval.
But that, to me, sounds like an assumption you would not want to make.

Similar Messages

Problem whit foreign key in target

I have a 2 interfaces whit the same source, one of this targets is a table whit a foreign key to the another table (in the another interface).
for example table1 and table2 - table2 has a column FK_table1.
What do put in the mapping interface in this field.
Thanks

As far an I understood it correctly:
Interface 1 - SrcTable -> Table1
Interface 2 - SrcTable -> Table2 (FK_Table1)
In this case, you will execute interfaces in order Interface 1 and then Interface 2.
In Interface 2, on the source datastore side, you will drag-drop table1 and make a join between SrcTable and Table1. And in the column for Table2, add the column from Table1.
Hope that helps

LINQ to SQL - UPDATE Foreign Key

Hi,
I'm doing a project with LINQ to SQL. I'm mapping the database in code.
I have 2 tables: Cargo(CodCargo PK, Cargo)
Utilizador(CodUtilizador PK, Utilizador, CodCargo FK.
Cargo:
1 - Client
2 - Provider
3 - Administrator
Utilizador:
1 - User1 - 2
2 - User2 - 3
Code in Class Utilizador:
private EntityRef<Cargo> _Cargo = new EntityRef<Cargo>();
[Association(IsForeignKey = true, Storage = "_Cargo", ThisKey = "CodCargo")]
public Cargo Cargo
get { return this._Cargo.Entity; }
set
Cargo oldCargo = _Cargo.Entity;
Cargo newCargo = value;
if (newCargo != oldCargo)
_Cargo.Entity = null;
if (oldCargo != null)
oldCargo.Utilizador.Remove(this);
_Cargo.Entity = newCargo;
if (newCargo != null)
newCargo.Utilizador.Add(this);
The problem is when I change for example in User1 this: User1.Cargo.Cargo = "Client"; Table "Cargo" change to this:
1 - Client
2 - Client
3 - Administrator
It shouldn't change, only the CodCargo on Utilizador should change.
How can I solve this without change Cargo , only updating the CodCargo on Utilizador if the field exists or create a new Cargo if don't.
Best regards,
ADAE.

Hello,
>>//Is is possible to do this:newUser.Cargo.Cargo = "Client"
This is not changed the foreign key constraint, it only performs what you see: change the
2 – Provider to 1 – Client, this is not controlled by Entity Framework, it is a rule of database. It is called foreign key constraint:
https://technet.microsoft.com/en-us/library/ms175464%28v=sql.105%29.aspx?f=255&MSPPError=-2147217396, since the Entity Framework is an ORM framework, it will follow this rule.
My suggestion is that you could do what I provide, to set it foreign key property.
Regards.
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.SubmitChanges does not update foreign key to the database

My problem occurs in a Windows Phone 8.1 Silverlight VB application. The CatDataContext defines a table Books with items Title and a foreign key _seriesID, with belongs to a table Series.
Updating of the field Title alone, or the fields Title and _seriesID works fine. However when I only change the _seriesID then no update of the underlying database is done. In this case .GetModifiedMembers shows no modifications.
A demo project with this problem is available.

Your demo project url is missing, check it.

Automatically update foreign key

Hello,
I am new into Application Express and currently developing an application to handle amongst other things databases with instances and users. The databases have an internal 10-digit number (ID) as primary key. This number can be found in the instances and user table as a foreign key. However, it is possible that the databases unique 10-digit ID changes and I wan't to know if it's possible to automatically update the foreign key in the instances and in the user table when the database ID is changed or if it is possible at all to change a primary key?
I have created a report of existing databases with a link on the name of each database directing to another page where you can change every value for the selected database. This works properly and I wan't to enable for the database ID to be changed here as well (and to automatically update all tables where the ID is a foreign key) if it's possible.
Thank you in advance
Fabian

Hi Fabian,
you can also use a trigger to do the Foreign key update on your child tables.
In my example the trigger will only fire if the primary key (JOB_ID) of the JOBS table gets updated. In that case it will update all records in the detail table EMPLOYEES to the new primary key value.
CREATE OR REPLACE TRIGGER TRG_JOBS_PK_UPDATE
AFTER UPDATE
OF JOB_ID
ON JOBS
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
BEGIN
    UPDATE EMPLOYEES
       SET JOB_ID = :NEW.JOB_ID
     WHERE JOB_ID = :OLD.JOB_ID
END;Hope that helps
Patrick
Check out my APEX-blog: http://inside-apex.blogspot.com
Check out the ApexLib Framework: http://apexlib.sourceforge.net

How to update the foreign key in a 1-to-many relation ?

I have Product mapped to Channel as 1-1, and Channel mapped to Product as 1-M. Product has a nullable channel_id_fk as a foreign key to Channel, (so one can optionally specify or change the channel of a specific product).
Starting with a specific product with a null channel_id_fk, I
1) add this product to a channel (with a vector of products via ValueHolderInterface);
2) set the channel of this product; and
3) update the channel in a unit-of-work.
The product.channel_id_fk doesn't get updated in db.
I tried setting each side of the relation as read-only, but still it doesn't work.
What am I missing ?
(I am using toplink 9.0.4)

More info:
1) There is only a single uow involved, so there is no nested transaction.
2) I tried checking the "target foriegn key" in the 1-1 mapping from Product to Channel, but this resulted in a exception thrown during runtime when the channel is accessed from the product:
Local Exception Stack:
Exception [TOPLINK-6094] (OracleAS TopLink - 10g (9.0.4) (Build 031126)): oracle.toplink.exceptions.QueryException
Exception Description: The parameter name [AFFINITY_CHANNEL_ID_FK] in the query's selection criteria does not match any parameter name defined in the query.
Query: ReadObjectQuery(au.com.agl.application.scorecard.AffinityChannel)
     at oracle.toplink.exceptions.QueryException.parameterNameMismatch(QueryException.java:658)
     at oracle.toplink.internal.expressions.ParameterExpression.getValue(ParameterExpression.java:149)
     at oracle.toplink.queryframework.SQLCall.translate(SQLCall.java:334)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(CallQueryMechanism.java:129)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.executeCall(CallQueryMechanism.java:111)
     at oracle.toplink.internal.queryframework.CallQueryMechanism.selectOneRow(CallQueryMechanism.java:584)
     at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectOneRowFromTable(ExpressionQueryMechanism.java:792)
     at oracle.toplink.internal.queryframework.ExpressionQueryMechanism.selectOneRow(ExpressionQueryMechanism.java:763)
     at oracle.toplink.queryframework.ReadObjectQuery.execute(ReadObjectQuery.java:340)
     at oracle.toplink.queryframework.DatabaseQuery.execute(DatabaseQuery.java:498)
     at oracle.toplink.queryframework.ReadQuery.execute(ReadQuery.java:111)
     at oracle.toplink.publicinterface.Session.internalExecuteQuery(Session.java:1968)
     at oracle.toplink.threetier.ServerSession.internalExecuteQuery(ServerSession.java:629)
     at oracle.toplink.publicinterface.Session.executeQuery(Session.java:1096)
     at oracle.toplink.internal.indirection.QueryBasedValueHolder.instantiate(QueryBasedValueHolder.java:52)
     at oracle.toplink.internal.indirection.DatabaseValueHolder.getValue(DatabaseValueHolder.java:63)
     at au.com.agl.application.scorecard.ProductDetails.getExclusiveAffinityChannel(ProductDetails.java:69)
....

Dimension foreign key on Fact gets updated with same value

Hi All,
I'm hoping someone has at least seen this problem and can provide insight.
Background:
- We are on OWB 10.2
- Fact table is Billing_F
- Fact table has foreign keys to Customer_Dim, SalesOrg_Dim, Time_Dim, etc.
- Fact table has update mode Update/Insert
Once in a while, every row in the Billing Fact gets updated with the SAME SalesOrg_Dim foreign key column value. In other words, the data would look like:
Before:
Line ID Amt SalesOrg_Key
1 100 19241
2 200 21925
3 140 08585
After:
Line ID Amt SalesOrg_Key
1 100 12345
2 200 12345
3 140 12345
*** The Source tables contain values in the Before table. ***
We can't reproduce this on a consistent basis. The only way to "correct" the data is to rerun the mapping from source -> staging -> fact again. No other change.
Please, has anyone else at least experienced this problem? If so, how were you able to fix it permanently?
Any help is greatly appreciated!
irene

Hi Irene
Difficult to help here without reviewing your mappings/schedule but does SalesOrgKey 12345 represent a particular value e.g. Unknown, Default?
I suspect it's something to do with your load order in that the data in the dimension is not available/ready when the fact is loaded and therefore a default value is being inserted. When the fact load is rerun I'm guessing the load of the dimension has finished and therefore the key lookup returns the proper keys from the dimension. Is the dimension truncated and reloaded?
Regards
Si

Update primary key thats also a foreign key in another table

Hi Developers,
I need to update the primary key for a record but it's also the foreign key in another table.
Example,
Table 1 Details
Name : Parent_Table
Columns : ID, Name, Age
Primary Key : ID
Table 2 Details
Name : Child_Table
Columns : ID, Parent_ID, Name, Age
Primary Key : ID
Foreign Key : Parent_ID (Primary Key in Parent_Table)
Parent_Table
ID Name Age
1001 Sam 26
1002 George 25
Child_Table
ID Parent_ID Name Age
1010 1001 Sam 26
1020 1002 George 25
Now I want to update ID (1001) in Parent_table as 2001 and also, I want to update Parent_ID (1001) in Child_Table as 2001.
How we will write the java code to update these columns.
Thanks in advance.

dcminter wrote:
If you're looking at changing the primary keys in your data then there's probably something wrong with your data structure.Depends how you feel about business primary keys versus surrogates. Personally I prefer the latter so I'm with you in theory. In practice, however, a DB that uses a business PK may well find that it's a legitimate use case to change the key value (but then that's why I like surrogates in the first place!)Primary keys should not have meaning.

Update query with multiple foreign key parameters

I am trying to perform an update query on one field that uses multiple foreign key parameters from one table to update the other table. The data in all three foreign key parameter fields are not constant. Accuracy is absolutely critical. I tied this as well as other various scenarios with no success. Can anyone help?
Update A_table a
set a.rate = (
select b.rate
from B_table b
where b.id = a.id
and b.transdate = a.transdate
and b.orgnum = a.orgnum
and b.transdate = to_date('31/12/2007', 'dd/mm/yyyy')
)

I would check symbols by a user name and number of posts before calling anyone a hot shot, especially damorgon. 
Yes version matters (due to bugs and features in each version). 
DDL matters because of indexes and associations. 
Data matters because it makes a difference on how SQL can be written. 
Reasons why an SQL statement don't work is because we aren't looking over your shoulder at your screen. 
damorgon did leave off his list that the best place for this question is on the PL/SQL, where they will ask you similar questions in addition to your explain plan and data volumes.

Publish: dropping index when it is used for foreign key constraint enforcement

Hi,
I'm trying to update a target schema from a reference database via Publish. Among the changes to apply, there's an index that needs to be dropped. Since it's linked to a foreign key constraint, it cannot be deleted unless the foreign key is temporarily dropped
(I saw somewhere that disabling the foreign key should be enough but it doesn't seem to work either).
Since there are other changes to be made on the same table, this foreign key also has to be dropped before the script can delete the table and re-create it. This part of the script is correctly generated. The problem is that this part appears after the 'DROP
INDEX' instruction.
So when generating the update script, SSDT tries to drop the index BEFORE dropping the foreign key. And I can't drop the foreign key in my custom pre-deployment script, otherwise the update script would fail when trying to delete it again.
Shouldn't SSDT be smart enough to drop the constraint before the index? Is it a bug or did I forget to set an option? If it's not a bug, what can I do apart from doing it manually?
Thank you for your help

Hi Elsa,
That sounds like a bug. Could you please file a Connect issue for this at
https://connect.microsoft.com/SQLServer/feedback/CreateFeedback.aspx using the category "Developer Tools (SSDT, BIDS, etc.)"? We're trying to track all bugs through
Connect so that you can tell when we have fixed the issue and we can request more information.
A workaround for this issue might be to write a pre-deployment script for your project to drop the foreign key prior to deployment. A pre-deployment script can be added to your project by right-clicking on the
project in solution explorer and then clicking on Add > Script... and selecting Pre-Deployment Script from the list.
Thanks!

How to insert value for composed foreign key?

My problem when I update or insert to table Ffclient which has link 1-1 with other table ClientLoan by composes primary key loanId and clienId (break table). I auto mapping by Jdeveloper 10g version 10.1.2. In FfClient table has two fields compose foreign key of ClientLoan as loanId and clienId not nullable. In toplink object Ffclient it only has one reference ClientLoan object by clientLoan field, not has two fields loanId and clienId . When I insert or update to database, I can't set value for these two fields direct so I have created new ClientLoan object and set value for composed primary key loanId and clienId, after that set it to object Ffclient. But when I update or insert to database it occurs exception about insert null for two not nullable fields: loanId and clienId.
Any one has error as mime? Any one help me correct my error.
Thanks in advance.
Mapping is:
â¦.
<database-mapping>
<attribute-name>ffclientCollection</attribute-name>
<read-only>false</read-only>
<get-method-name>getFfclientCollection</get-method-name>
<set-method-name>setFfclientCollection</set-method-name>
<reference-class>uk.co.lsb.elb.toplink.Ffclient</reference-class>
<relationship-partner-attribute-name>clientLoan</relationship-partner-attribute-name>
<is-private-owned>false</is-private-owned>
<uses-batch-reading>false</uses-batch-reading>
<indirection-policy>
<mapping-indirection-policy>
<type>oracle.toplink.internal.indirection.TransparentIndirectionPolicy</type>
</mapping-indirection-policy>
</indirection-policy>
<container-policy>
<mapping-container-policy>
<container-class>oracle.toplink.indirection.IndirectList</container-class>
<type>oracle.toplink.internal.queryframework.ListContainerPolicy</type>
</mapping-container-policy>
</container-policy>
<source-key-fields>
<field>LSB.CLIENT_LOAN.CLIENT_ID</field>
<field>LSB.CLIENT_LOAN.LOAN_ID</field>
</source-key-fields>
<target-foreign-key-fields>
<field>LSB.FFCLIENT.CLIENT_ID</field>
<field>LSB.FFCLIENT.LOAN_ID</field>
</target-foreign-key-fields>
<type>oracle.toplink.mappings.OneToManyMapping</type>
</database-mapping>
â¦..
<database-mapping>
<attribute-name>clientLoan</attribute-name>
<read-only>false</read-only>
<reference-class>uk.co.lsb.elb.toplink.ClientLoan</reference-class>
<relationship-partner-attribute-name>ffclientCollection</relationship-partner-attribute-name>
<is-private-owned>false</is-private-owned>
<uses-batch-reading>false</uses-batch-reading>
<indirection-policy>
<mapping-indirection-policy>
<type>oracle.toplink.internal.indirection.BasicIndirectionPolicy</type>
</mapping-indirection-policy>
</indirection-policy>
<uses-joining>false</uses-joining>
<foreign-key-fields>
<field>LSB.FFCLIENT.CLIENT_ID</field>
<field>LSB.FFCLIENT.LOAN_ID</field>
</foreign-key-fields>
<source-to-target-key-field-associations>
<association>
<association-key>LSB.FFCLIENT.LOAN_ID</association-key>
<association-value>LSB.CLIENT_LOAN.LOAN_ID</association-value>
</association>
<association>
<association-key>LSB.FFCLIENT.CLIENT_ID</association-key>
<association-value>LSB.CLIENT_LOAN.CLIENT_ID</association-value>
</association>
</source-to-target-key-field-associations>
<type>oracle.toplink.mappings.OneToOneMapping</type>
</database-mapping>

Yes, many thanks for you reply.
My project has many layer (include DAO + EJB + BO + WEB).
Toplink objects which are auto created by TopLink has only using in DAO and EJB layer, then toplink objects are transfer to Bean objects (valueObject) which are contain primitive java type as int, long, double... not java wrapper object as Integer, Long, Double... Bean objects are using from EJB to WEB layer. So when set value to bean object from toplink object I sometime don't set all reference toplink object to reference object of bean (although bean has references bean object as toplink object) because there are too big. So when I update data from WEB layer to EJB layer, before update to database, I must get fill all data for foreign key of update object by create new reference toplink object, add reference_id to this object and set it to update object. I waste a lot of time, its very handwork and tire. Are you has any solution about this problem?
Thank in advanced.
ThangNQ

Can not insert null into foreign key issue

Hi ,
I am having parent-child relationship table.
In the child table when I am adding a new record , data is getting inserted with foreign key.
After insert if I immediately update the same record. Its giving error that can not insert null into foreign key.
If i click on rollback button I am able to update that record properly.

Hi ,
I am having parent-child relationship table.
In the child table when I am adding a new record , data is getting inserted with foreign key.
After insert if I immediately update the same record. Its giving error that can not insert null into foreign key.
If i click on rollback button I am able to update that record properly.

Foreign key

How can I insert a row into a table with the foreign key of column ID?
The foreign key link to other unique key of other table.
My code:
Long id = 43850943l;
PreparedStatement persInfUpdate = con.prepareStatement("INSERT INTO PersonalInfo (ID, FirstName, SecondName, Age, GenderMale, Married) VALUES (?, ?, ?, ?, ?, ?)");
persInfUpdate.setLong(1, id);
persInfUpdate.setString(2, personalInfo.getFirstName());
persInfUpdate.setString(3, personalInfo.getLastName());
persInfUpdate.setInt(4, personalInfo.getAge());
persInfUpdate.setBoolean(5, personalInfo.isGenderMale());
persInfUpdate.setBoolean(6, personalInfo.isMarried());
persInfUpdate.executeUpdate();
Error:
INSERT on table 'PERSONALINFO' caused a violation of foreign key constraint 'F1_KEY' for key (0). The statement has been rolled back.

The foreign key must already exist before you can do update.
Jamie

Transfer data from one database to another without identities but keep the relation b/w PK and Foreign key

Hi,
I need to transfer data from one database to another database (both are identical databases).
1. Not transferring identity columns (primary keys). the destination table might have the same key.
2. keep the PK's and FK's relation b/w parent and child table
3. I have 4 levels
Example: tableA (col1 int identity(1,1) , col2, col3)
tableB (col1 int identity(1,1) ,
col2 , col3) -- col2 has the foreign key relation with tableA.col1
tableC (col1 int identity(1,1) ,
col2, col3) -- col2 has the foreign key relation with tableB.col1
tableD (col1 int identity(1,1) , col2, col3) -- col2 has the foreign key relation with tableC.col1
please advise me.
Thanks in advance

Try the below:
/********************************SAMPLE TARGET***************************************************************/
Use MSDNSamples
create table TableA(LevelValueId int identity(1,1) primary key, name varchar(100))
Insert into TableA(name) Select 'R1'
Insert into TableA(name) Select 'R2'
create Table TableB(ChildId int identity(100,1),name varchar(100), LevelValueID int references TableA(LevelValueId))
Insert into TableB(name,LevelValueID) Select 'Childname1',1
/********************************SAMPLE TARGET***************************************************************/
/********************************SAMPLE SOURCE***************************************************************/
Use Sample
create table TableA(LevelValueId int identity(1,1) primary key, name varchar(100))
Insert into TableA(name) Select 'C1'
Insert into TableA(name) Select 'C2'
create Table TableB(ChildId int identity(100,1),name varchar(100), LevelValueID int references TableA(LevelValueId))
Insert into TableB(name,LevelValueID) Select 'Kidname1',1
/********************************SAMPLE SOURCE***************************************************************/
USe MSDNSamples
/********************************MIGRATION INTERMEDIATE TABLE***************************************************************/
--Migration table
Create table Mg_TableA(LevelValueId int, NewValueId int)
/********************************MIGRATION INTERMEDIATE TABLE***************************************************************/
/********************************ACTUAL MIGRATION FOR MASTER TABLE***************************************************************/
MERGE INTO TableA
USING sample.dbo.TableA AS tv
ON 1 = 0
WHEN NOT MATCHED THEN
INSERT(name) Values(tv.name)
Output tv.levelValueId ,inserted.LevelValueid INTO
Mg_TableA;
/********************************ACTUAL MIGRATION FOR MASTER TABLE***************************************************************/
/********************************ACTUAL MIGRATION FOR CHILD TABLE***************************************************************/
Insert into TableB (name,LevelValueID)
Select A.name,B.NewValueId From sample.dbo.TableB A
Inner join Mg_TableA B on A.LevelValueID = B.LevelValueId
/********************************ACTUAL MIGRATION FOR CHILD TABLE***************************************************************/
/********************************TEST THE VALUES***************************************************************/
Select * From TableA
Select * From Mg_TableA
Select * From TableB
/********************************TEST THE VALUES***************************************************************/
Drop table TableB,Tablea,Mg_TableA
Use Sample
Drop Table TableB,Tablea

Performance degradation when using foreign keys

Hi,
I face drastic performance degradation when I add foreign keys to a table and perform insert / update on that table.
I have a row store table to which I need to insert around 1,50,000 records.
If the table has no foreign key reference it takes maximum of 5 seconds but if the same table has references to other tables (in my case there are 3 references), the processing speed reduces drastically to 2 minutes.
Is there any solution / best practice that can help me in gaining performance (processing speed) in this situation?
Thanks
S.Srivatsan

Hi Sri,
When you perform one insert in any database table which is having foreign key relationships, it will check the corresponding parent tables to check whether the master data is available or not. If your table is having 2 foreign key relationship, it happen twice per insert. Hence the performance will degrade. This is one of the reasons why ECC doesn't establish foreign key relationship in the back end database. The case is not just for INSERT, for UPDATE & DELETE the same is applicable.
Sreehari

Update foreign key in target

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