Question on Cascade Deletes
All,
Facts :
1) I have 2 tables 150mil rows (table A) and second 125 mils rows (table B).
2) Table A <-> B is having FK 1:1 relationship and delete on table A is cascade delete on B
Issue : We are missing 25 mil rows in table B, and trying to delete Table A records with a PK in the where clause, I discovered that the cascade delete tries to Delete records in table B there are no records related to table A and it does a full table scan.
Question : How to delete the 25 mil rows effectively.
1) create index on table B same as PK of A and delete records from table.
2) Drop the FK constraint on table B and delete the records from table A and re-create the constraint.
Which one would be faster ?
Thanks,
SS
Pransuj,
You too! do not read the posts.
Have you heard about the concept of Partition
Tables.
Heard about Partition, Used it Extensively. Partitioning is not available at my clients place.
If I were you and have tables with that many millions
of rows, I would go for partition tables. If you have
partitioned tables you would not have run into these
kinds of problems
Not good enough Statement or reason to do Partitioning.
SS
Similar Messages
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Problem with cascade delete and remove bean
I am working with two entity beans that map to two tables that have a foreign key relationship. Table B has a foreign key to A and in the database that foreign key is set for cascaded updates and cascaded deletes.
The problem occurs when the the sytem first tries to remove bean 1 (mapped to table A) and then remove bean 2 (mapped to B) where bean 2 is associated with bean 1 with a foreign key relationship. The first remove works but then when it tries to remove bean 2 it throws a very ugly "CORBA TRANSACTION_ROLLEDBACK 9998" Maybe exception. My guess is that the reason is because bean 2's reocrd in the database was deleted when bean 1 was removed but the 'bean object' was not removed from the container.
When I go into our Application Server and look at how it see's the tables, it show the wrong relationship. It shows a restrict delete and a restrict update realationship.
My question is, am I wrong to think that this is a application server problem or a configuration problem? It seems to me that attempting to remove a non-existant record should not cause an error. It won't cause any SQL exceptions. Is this a flawed viewpoint? As a work around I made sure that the dependent records are deleted first but it kind of defeats the point of cascaded deletes.
We have a limited number of support calls, should I use one or am I at fault here?If the database removes the record from the second
table, why is the system trying to remove it once
again? You should try to remove an entity from a
single place, should it be the database or the
application. Don't try to remove it twice.
Regards,
DimitarI could do this but it is a huge pain in my ass. The problem is that you might want to remove the dependent bean without removing it's parent. The object structure is a little questionable, I'll admit that. It is, as they say, the eleventh hour and I can't really change that now.
The way this work is that the server gets a list of objects marked either as new, modified, or deleted. It then relates those changes back to the database.
In this case we have two lists(which makes me realize where the class structure sucks.) In order to do what you suggest I would have to get all the deleted parent objects and then search all the deleted child objects for ones that have the parent's key in them.
It would be prefferable to fix the class structure but again this is not an option.
Anyone want to answer the question I asked? -
Cascading Delete in BC4J-UIXml application
Morning all,
I have a problem with a UIXml application that I was wondering somebody could help me with. Since I am new to this technology, please excuse the simplistic nature of the question.
I have a BC4J application working through UIX pages. In this application I have a form that deletes a record from the table. However, I am unable to determine how to perform an automatic cascading delete on the record since it has child records in another table.
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AdeelThis was resolved in the entity's association properties.
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Hibernate child cascade delete child???
i am facing a problem on the cascade delete of a parent object, i try to explain the problem by example.
Parent object C
Child object D,E,F
i want to delete the parent object "delete(c) ".
before the parent can be deleted the child D,E and F has to be deleted.
My relations are defined with cascade="all-delete-orphan" in the parent
object. In my child no cascade is defined.
When i check the logging on deletion of the object i see that hibernate
tries to update reference in the child to the parent by setting the value to
null. But since the the reference is obligated (NOT NULL in database)
i get a not null constraint violation.
My first question is why does hibernate not delete the child record instead of updating the reference (since my child object is remove
from my collection in the parent object)?
Could some one tell me what i am doing wrong? or does there not exist a solution.
thnxFirst, is that a typo? The docs for 3.1 that I'm looking at say "all,delete-orphan", but you have "all-delete-orphan".
Second, I thought (and it's been a long time since I've needed to do this) that you defined the cascading in the child. I could be wrong though.
What kind of relationship is this? The docs say that delete-orphan only applies to one-to-many.
You might want to go through the pertinent sections of these if you haven't already:
http://www.hibernate.org/hib_docs/v3/reference/en/html/mapping.html
http://www.hibernate.org/hib_docs/v3/reference/en/html/collections.html
[url http://www.hibernate.org/hib_docs/v3/reference/en/html/objectstate.html#objectstate-transitive]http://www.hibernate.org/hib_docs/v3/reference/en/html/objectstate.html#objectstate-transitive -
Weblogic 9.1, EJB 2.0, Oracle 9i: Cascade delete Error
Hi All,
I am facing an error with the cascade-delete facility in ejb2.0 with weblogic 9.1
Assume that I have the following relation:
<ejb-relation>
<ejb-relation-name>TeacherEJB-StudentEJB</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>teacher-has-student
</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>TeacherEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>teacher</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>student-has-teacher
</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>StudentEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>student</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type><cmr-field>
</ejb-relationship-role>
</ejb-relation>
Now when I have to delete one record from the DBSTUDENT table, what i do is the following:
StudentHomeLocal.remove(studentModel.getStudentId());
The above statement throws an SQLException staying it can't update TeacherID in DBSTUDENT (PK of DBTEACHER, FK in DBSTUDENT) with NULL.
The same code is working perfectly well in Weblogic 8.
I even tried deleting the local directly by the following statement:
StudentLocal.remove();
But this too doesn't work.
I also tried by removing the <cascade-delete/> attribute from the ejb-jar.xml file and updating the 'on-delete cascade' option in the database, but this too did not work.
There is another option of <db-cascade-delete> in weblogic-cmp-rdbms-jar.xml that I tried but this too did not work.
In short, I have tried the following cases but to no avail:
1. Mention cascade delete in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar and in the database.
2. Mention nothing in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar but 'on cascade delete' mentioned in the database.
3. Mention cascade delete in ejb-jar.xml and db-cascade-delete mentioned in weblogic-cmp-rdbms-jar.xml.jar and 'on cascade delete' in the database.
4. Remove all cascade delete from the ejb-jar.xml,the weblogic-cmp-rdbms-jar.xml and from the database.
Neither of the above work.
Kindly help ASAP.
Thanks in advance,
Sachidanand.Hi All,
I am facing an error with the cascade-delete facility in ejb2.0 with weblogic 9.1
Assume that I have the following relation:
<ejb-relation>
<ejb-relation-name>TeacherEJB-StudentEJB</ejb-relation-name>
<ejb-relationship-role>
<ejb-relationship-role-name>teacher-has-student
</ejb-relationship-role-name>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>TeacherEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>teacher</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<ejb-relationship-role-name>student-has-teacher
</ejb-relationship-role-name>
<multiplicity>Many</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>StudentEJB</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>student</cmr-field-name>
<cmr-field-type>java.util.Collection</cmr-field-type><cmr-field>
</ejb-relationship-role>
</ejb-relation>
Now when I have to delete one record from the DBSTUDENT table, what i do is the following:
StudentHomeLocal.remove(studentModel.getStudentId());
The above statement throws an SQLException staying it can't update TeacherID in DBSTUDENT (PK of DBTEACHER, FK in DBSTUDENT) with NULL.
The same code is working perfectly well in Weblogic 8.
I even tried deleting the local directly by the following statement:
StudentLocal.remove();
But this too doesn't work.
I also tried by removing the <cascade-delete/> attribute from the ejb-jar.xml file and updating the 'on-delete cascade' option in the database, but this too did not work.
There is another option of <db-cascade-delete> in weblogic-cmp-rdbms-jar.xml that I tried but this too did not work.
In short, I have tried the following cases but to no avail:
1. Mention cascade delete in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar and in the database.
2. Mention nothing in ejb-jar.xml and nothing mentioned in weblogic-cmp-rdbms-jar.xml.jar but 'on cascade delete' mentioned in the database.
3. Mention cascade delete in ejb-jar.xml and db-cascade-delete mentioned in weblogic-cmp-rdbms-jar.xml.jar and 'on cascade delete' in the database.
4. Remove all cascade delete from the ejb-jar.xml,the weblogic-cmp-rdbms-jar.xml and from the database.
Neither of the above work.
Kindly help ASAP.
Thanks in advance,
Sachidanand. -
Foreign keys on cascade delete rules are not migrated
hello folks, i tried to migrate a database from sql server 2005 to oracle 10g express using SQL Developer 1.5.5 and noticed that the cascade delete option of the foreign keys was ignored by the tool.
I'd like to know if it's a limitation of the tool or a bug. I have over 500 fks with such configuration and it would be simply impossible to manually configure every migrated fk in oracle.
thanks all.Thanks,
Already logged:
Bug 7652822 - ON DELETE CASCADE IS LOST DURING MIGRATION
-Turloch -
I'm trying to use the cascade delete option and am having problems.
Here is my jdo file:
<class name="RoomScene" objectid-class="RoomSceneId">
<extension vendor-name="kodo" key="jdbc-class-map"
value="base">
<extension vendor-name="kodo" key="table"
value="t_roomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column"
value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map"
value="value">
<extension vendor-name="kodo" key="column"
value="id_i"/>
</extension>
</field>
<field name="itemLinks">
<collection element-type="ItemLink"/>
<extension vendor-name="kodo" key="element-delete-action"
value="cascade"/>
<extension vendor-name="kodo" key="jdbc-field-map"
value="one-many">
<extension vendor-name="kodo" key="table"
value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="ref-column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
</class>
<class name="ItemLink" objectid-class="ItemLinkId">
<extension vendor-name="kodo" key="jdbc-class-map" value="base">
<extension vendor-name="kodo" key="table" value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column" value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="id_i"/>
</extension>
</field>
<field name="item">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_vc" value="item_id_vc"/>
</extension>
</field>
<field name="roomScene">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
<field name="linkText">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="linktext_vc"/>
</extension>
</field>
</class>
(each RoomScene has many ItemLinks)
but when I delete my RoomScene object, I get the following exception:
"kodo.util.FatalDataStoreException: ERROR: ExecUpdate: Fail to add
null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
NestedThrowables:
com.solarmetric.jdbc.ReportingSQLException: ERROR: ExecUpdate: Fail to
add null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
java.sql.SQLException: ERROR: ExecUpdate: Fail to add null value in
not null attribute roomscene_id_i
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:42)
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:24)
at
kodo.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:510)
at
kodo.runtime.PersistenceManagerImpl.flushInternal(PersistenceManagerImpl
..java:788)
at
kodo.runtime.PersistenceManagerImpl.beforeCompletion(PersistenceManagerI
mpl.java:644)
at
kodo.runtime.LocalManagedRuntime.commit(LocalManagedRuntime.java:69)
at
kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:
416)
at
net.mastertile.www.room.action.RoomSceneDeleteAction.executeLogic(RoomSc
eneDeleteAction.java:27)
my kodo.properties file is like this:
javax.jdo.PersistenceManagerFactoryClass:
kodo.jdbc.runtime.JDBCPersistenceManagerFactory
javax.jdo.option.RetainValues: true
javax.jdo.option.RestoreValues: true
javax.jdo.option.Optimistic: true
javax.jdo.option.NontransactionalWrite: false
javax.jdo.option.NontransactionalRead: true
javax.jdo.option.Multithreaded: false
javax.jdo.option.MsWait: 5000
javax.jdo.option.MinPool: 1
javax.jdo.option.MaxPool: 200
javax.jdo.option.IgnoreCache: true
javax.jdo.option.ConnectionFactoryName=java:comp/env/jdbc/default
javax.jdo.option.ConnectionFactory2Name=java:comp/env/jdbc/default
kodo.LicenseKey=XXXXXXXXXXX
kodo.jdbc.MappingFactory=metadata
kodo.DataCache=false
kodo.RemoteCommitProvider=sjvm
kodo.FlushBeforeQueries=false
kodo.jdbc.ForeignKeyConstraints=true
kodo.jdbc.SequenceFactory: native
kodo.jdbc.SchemaFactory: dynamic
We are using postgresql.
Thanks,
NathanWere the foreign keys generated in the database? You also may want to
try using the *-dependent extensions.
Nathan Voxland wrote:
I'm trying to use the cascade delete option and am having problems.
Here is my jdo file:
<class name="RoomScene" objectid-class="RoomSceneId">
<extension vendor-name="kodo" key="jdbc-class-map"
value="base">
<extension vendor-name="kodo" key="table"
value="t_roomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column"
value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map"
value="value">
<extension vendor-name="kodo" key="column"
value="id_i"/>
</extension>
</field>
<field name="itemLinks">
<collection element-type="ItemLink"/>
<extension vendor-name="kodo" key="element-delete-action"
value="cascade"/>
<extension vendor-name="kodo" key="jdbc-field-map"
value="one-many">
<extension vendor-name="kodo" key="table"
value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="ref-column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
</class>
<class name="ItemLink" objectid-class="ItemLinkId">
<extension vendor-name="kodo" key="jdbc-class-map" value="base">
<extension vendor-name="kodo" key="table" value="t_mapitemroomscene"/>
<extension vendor-name="kodo" key="pk-column" value="id_i"/>
</extension>
<extension vendor-name="kodo" key="jdbc-version-ind"
value="version-number">
<extension vendor-name="kodo" key="column" value="rowversion_i"/>
</extension>
<field name="id" primary-key="true">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="id_i"/>
</extension>
</field>
<field name="item">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_vc" value="item_id_vc"/>
</extension>
</field>
<field name="roomScene">
<extension vendor-name="kodo" key="jdbc-field-map" value="one-one">
<extension vendor-name="kodo" key="column.id_i"
value="roomscene_id_i"/>
</extension>
</field>
<field name="linkText">
<extension vendor-name="kodo" key="jdbc-field-map" value="value">
<extension vendor-name="kodo" key="column" value="linktext_vc"/>
</extension>
</field>
</class>
(each RoomScene has many ItemLinks)
but when I delete my RoomScene object, I get the following exception:
"kodo.util.FatalDataStoreException: ERROR: ExecUpdate: Fail to add
null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
NestedThrowables:
com.solarmetric.jdbc.ReportingSQLException: ERROR: ExecUpdate: Fail to
add null value in not null attribute roomscene_id_i {prepstmnt 2515391
UPDATE t_mapitemroomscene SET roomscene_id_i = ? WHERE roomscene_id_i =
?} [code=0, state=null]
java.sql.SQLException: ERROR: ExecUpdate: Fail to add null value in
not null attribute roomscene_id_i
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:42)
at
kodo.jdbc.sql.SQLExceptions.getFatalDataStore(SQLExceptions.java:24)
at
kodo.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:510)
at
kodo.runtime.PersistenceManagerImpl.flushInternal(PersistenceManagerImpl
.java:788)
at
kodo.runtime.PersistenceManagerImpl.beforeCompletion(PersistenceManagerI
mpl.java:644)
at
kodo.runtime.LocalManagedRuntime.commit(LocalManagedRuntime.java:69)
at
kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:
416)
at
net.mastertile.www.room.action.RoomSceneDeleteAction.executeLogic(RoomSc
eneDeleteAction.java:27)
my kodo.properties file is like this:
javax.jdo.PersistenceManagerFactoryClass:
kodo.jdbc.runtime.JDBCPersistenceManagerFactory
javax.jdo.option.RetainValues: true
javax.jdo.option.RestoreValues: true
javax.jdo.option.Optimistic: true
javax.jdo.option.NontransactionalWrite: false
javax.jdo.option.NontransactionalRead: true
javax.jdo.option.Multithreaded: false
javax.jdo.option.MsWait: 5000
javax.jdo.option.MinPool: 1
javax.jdo.option.MaxPool: 200
javax.jdo.option.IgnoreCache: true
javax.jdo.option.ConnectionFactoryName=java:comp/env/jdbc/default
javax.jdo.option.ConnectionFactory2Name=java:comp/env/jdbc/default
kodo.LicenseKey=XXXXXXXXXXX
kodo.jdbc.MappingFactory=metadata
kodo.DataCache=false
kodo.RemoteCommitProvider=sjvm
kodo.FlushBeforeQueries=false
kodo.jdbc.ForeignKeyConstraints=true
kodo.jdbc.SequenceFactory: native
kodo.jdbc.SchemaFactory: dynamic
We are using postgresql.
Thanks,
Nathan
Steve Kim
[email protected]
SolarMetric Inc.
http://www.solarmetric.com -
Cascade delete of products in APO
Hi,
I´m wondering if there are predefined ways for deleting a product and all it´s dependencies totally in APO. (Cascading deletion). I.e. setting a flag in the product master and getting rid of all connected PPM:s, location/product split, quota arrangements etc etc... Anybody knows how to do this efficiently?
BR
KarlHi,
I wish SAP has provided something like this.
UNfortunately there is no one button where in you can delete all the dependencies
Let me list you the steps to my best knowledge
(1) Supply Chain Engineer -- TRansaction-- /n/sapapo/SCC07
You can delete most of what you have asked
Location, LOcation Product, Product, Resource, Trans Lane, PPM
(2) Remember before this step, you will have to delete all the orders in all versions for this particular product location.
Use report: /sapapo/rlcdelete to do this.
Sometimes not all the orders get deleted and when you try to delete the master data in SCEngineer, it will say that there are dependencies.
Then you would have to use the " WHERE USED LIST" for each master data and then it will display you the order numbers.
You would have to manually delete each order number using the RLCDELETE report.
Hope this helps.
Regards
Kumar -
Urgent :: How to do Cascade delete in OA Framework??
I have built a employeeSearch page. The VO is based on only one EO that is EmployeeEO. This emp_id is referred in 4 other tables.
what i want to do is ---
when i delete the employee from employee Search Page. the corresponding records in other tables must get deleted.
Can i do a Cascade delete over here.
Please help.Use a pl/sql api to do the cascaded delete and call it from OAF.
--Shiv -
Privately Owned and Cascade Delete in DB
HI,
What is the relationship between setting privately owned in Toplink vs creating a cascade delete in Oracle DB? If I've the cascade delete in DB then what is the advantage of setting the privately owned flag in toplink?
ThanksIf you only set the cascade delete option in the database, then TopLink will have no knowledge that the private object was deleted (or that it is private in general). This would mean that TopLink would not remove the private object from the cache or process it as have being deleted. In general this may not cause your app any direct issues if you never read the private object directly as it will eventually garbage collect from the cache.
Making the relationship privately own in TopLink will also ensure the following:
- If you replace the private object with another, or set it to null, TopLink will delete the old object on the update of the source. Cascade delete only works on deletion.
- If the relationship is a 1-m and you remove an object from the collection it will be removed.
- If you refresh the parent object, by default the child will also be refreshed.
- If you merge the parent object, by default the child will also be merged. -
Problem with cascade delete in CMP one-to-one relationship
I am not able to cascade delete for one-to-one relationship. Even though relationship seems to be setup correctly, record from the second table is not deleted.
Following is the structure of tables i am using:
First Table(vcc_lrmc) -- LRMCBean
lrmc_id pk (Bean field is id)
lrmc_dtl_id (Bean field islrmcDtlId)
Second Table (vcc_lrmc_dtl) -- LRMCDetailBean
lrmc_dtl_id (pk) (Bean field islrmcDtlId)
lrmc_id (Bean field id)
One to one bidirectional relationship has been setup with CMR fields moreLRMC and mainLRMC.
section of ejb-jar is as follows:
<ejb-relation>
<ejb-relation-name>LRMCMainToDetail</ejb-relation-name>
<ejb-relationship-role>
<multiplicity>One</multiplicity>
<relationship-role-source>
<ejb-name>LRMC</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>moreLRMC</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
<ejb-relationship-role>
<multiplicity>One</multiplicity>
<cascade-delete/>
<relationship-role-source>
<ejb-name>LRMCDetail</ejb-name>
</relationship-role-source>
<cmr-field>
<cmr-field-name>mainLRMC</cmr-field-name>
</cmr-field>
</ejb-relationship-role>
</ejb-relation>
section of orion-ejb-jar is as follows:(Bidirectional mapping)
<entity-deployment name="LRMC" data-source="jdbc/VCCDS" table="VCC_LRMC">
<cmp-field-mapping name="moreLRMC">
<entity-ref home="LRMCDetail">
<cmp-field-mapping name="lrmcDtlId" persistence-name="LRMC_DTL_ID"/>
</entity-ref>
</cmp-field-mapping>
</entity-deployment>
<entity-deployment name="LRMCDetail" data-source="jdbc/VCCDS" table="VCC_LRMC_DTL">
<cmp-field-mapping name="mainLRMC">
<entity-ref home="LRMC">
<cmp-field-mapping name="id" persistence-name="LRMC_ID"/>
</entity-ref>
</cmp-field-mapping>
</entity-deployment>
Is there anything else need to be setup for Cascade delete or is there anything wrong the way one-to-one relationship has been setup.
Pls. advice.
Thanks
DhirajIs it happening because of this bug.
Cannot create a 1:1 bi-directional CMR for entity beans when database tables are reverse engineered. (2447364)
Anyone, any idea on this ?
Cheers,
Dhiraj -
Cascade delete in privatelyownedrelationships
If a one-to-many mapping is defined as a privately owned relationship, when I delete a record from this collection, I get integrity constraint exception stating that
'child record exits', in a privately owned collection, dont the child records get deleted automatically,
We are removing a record from the collection and trying a commit thru UOW. thanksLooks like a bug in the way the cascade delete is being done, if we remove the constraints then the cascade delete works.
-
Cascade delete in many to many association
Hi All,
I have a usecase, there is an association with many to many cardinality between 3 EO's. If i delete any record in master, the corresponding childs all should delete.
So appreciate if any alternatives on above usecase. Thanks in advanceHi,
cascade delete is a function of the database. When you enable cascade delete for an entity operation then this only produces the proper SQL code for deleting a data object. If you have a many-to-many relation then this means you have multiple master and child records, which I think makes your "If i delete any record in master, the corresponding childs all should delete" impossible.
for what its worth, please read
Creating a Business Domain Layer Using Entity Objects - 11g Release 2 (11.1.2.3.0)
to learn how to parse and delete detail records from an entity object
http://docs.oracle.com/cd/E35521_01/web.111230/e16182/bcentities.htm#CEGJAFCF
The last document is about posting orders (e.g. create a master record before you create detail records). However, with a few changes you can reverse this to perform a delete operation (just add this code to the entity impl classes of the entities so they delete their child objects
Frank -
i am having a problem deleting child object
here is my code
my hibernate files are generated with xdoclet
I want to remove an object AFVALSTOF with all it's childs. the relationship is bi-directional. parent object is AFVALSTOF and as example child is OVERBRENGER. the relationship is obligated (not-null="true")
By viewing the hibernate logging i can see that the key field of the child is update to null first but this is an obligated field.
Can anyone help me on how to define my relationship so i can execute the cascade delete?
This is a part of my parent object (AFVALSTOF) which causes
problems
/ private Set overbrenger = new HashSet( );
* @hibernate.set tablename="overbrenger" lazy="true" inverse="false"
* cascade="all-delete-orphan"
* @hibernate.collection-key column="ovbr_afvs_id"
* @hibernate.collection-one-to-many class="be.milieuinfo.imjv.database.model.afval.Overbrenger"
* @return Set
public Set getOverbrenger() {
return overbrenger;
* @param overbrenger
* Overbrenger
public void setOverbrenger(Set overbrenger) {
this.overbrenger = overbrenger;
THIS IS THE CHILD (OVERBRENGER) which has a relationship to the PARENT called AFVALSTOF
private Afvalstof afvalstof ;
* @hibernate.many-to-one column="ovbr_afvs_id" class=
* "be.milieuinfo.imjv.database.model.afval.Afvalstof"
* not-null="true" inverse="true" cascade="all"
* @return Afvalstof
public Afvalstof getAfvalstof() {
return afvalstof ;
* @param afvalstof
public void setAfvalstof(Afvalstof afvalstof) {
this.afvalstof = afvalstof ;
thnx
Stefaan<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.orly_otero.patterns.VO.ArticleVO" table="tblArticles">
<id name="idArticle" type="long">
<column name="id_Article" not-null="true"/>
<generator class="native"/>
</id>
<property name="title" type="string">
<column name="Title" length="200" not-null="true"/>
</property>
<property name="abstracT" type="string">
<column name="Abstract" length="2000" not-null="true"/>
</property>
<property name="keywords" type="string">
<column name="Keywords" length="200" not-null="true"/>
</property>
<property name="type" type="string">
<column name="type" length="1" not-null="true"/>
</property>
<property name="position" type="integer">
<column name="position" not-null="false"/>
</property>
<property name="isBriefContribution" type="boolean">
<column name="isBriefContribution" not-null="false"/>
</property>
<many-to-one name="issueVO" column="id_Issue" class="com.orly_otero.patterns.VO.IssueVO" not-null="true"/>
<set name="authorsVO" table="tlbArticlesAuthors" lazy="true" cascade="save-update">
<key column="id_Article"/>
<many-to-many class="com.orly_otero.patterns.VO.AuthorVO" column="id_Author"/>
</set>
<set name="sectionsVO" inverse="true" lazy="true" cascade="all" order-by="position ASC">
<key column="id_Article" not-null="true"/>
<one-to-many class="com.orly_otero.patterns.VO.SectionVO"/>
</set>
</class>
</hibernate-mapping> -
Cascade delete in CMP 1:M relationship
All,
I have 2 CMP entity beans with 1:M relationship and cascade delete option setup. All functions of Add/Mod are working fine.
Even cascade delete is getting trigged but not executing properly every time. Out of more than 100 records in the child table, only 99 are getting cascade deleted. I am deploying the beans using embedded OC4J which comes with JDeveloper.
Is anyone aware of any such limitations or faced similar problem before ? Database tables don't have any integrity constraint setup.
Thanks,
DhirajThe problem is that by making the AddrXRef privately owned it cannot be reparented. Once it is removed from it's parent's list (either one) it will be deleted. To achieve what you're trying to do you'll need to delete the old incorrect AddrXRef and replace it with a new correct one.
From the TopLink Developer's Guide[1]:
When you tell TopLink that a relationship is privately owned, you are specifying that:
* If the source of a privately owned relationship is deleted, then delete the target.
* If you remove the reference to a target from a source, then delete the target.
--Shaun
[1] http://www.oracle.com/technology/products/ias/toplink/doc/10131/main/_html/uowbas007.htm#i1134011
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