How to delete a row from database table in facade client

Hi all,
I followed the tutorial in creating a persistence entity from database table, then a session facade. Then I followed the tutorial to create a sample client to test the model. In the session facade, I could use persistEntity method to insert a record to the database. I am just thinking of an extension to the tutorial, i.e., being able to delete the record too. So I created a new method removeEntity in the session facade
public void removeEntity(Object entity) {
entity=em.merge(entity);
em.remove(entity);
em.flush();
and called it in the sample client. It was executed without any error, but the record in the table still exists.
I tried to look around for a solution, but I did not find one. Would anybody here please help out? Many thanks in advance!

Hi Frank,
I tried the code snippet, but I got the following exception when executing this code:
javax.ejb.EJBException: EJB Exception: ; nested exception is:
     java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.; nested exception is: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
     at weblogic.deployment.BasePersistenceContextProxyImpl.validateInvocation(BasePersistenceContextProxyImpl.java:121)
     at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:86)
     at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:91)
     at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:80)
     at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:26)
     at $Proxy141.getTransaction(Unknown Source)
     at model.SessionEJBBean.removeEntity(SessionEJBBean.java:60)
     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:597)
     at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:37)
     at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:55)
     at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:50)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
     at $Proxy143.removeEntity(Unknown Source)
     at model.SessionEJB_qxt9um_SessionEJBImpl.removeEntity(SessionEJB_qxt9um_SessionEJBImpl.java:142)
     at model.SessionEJB_qxt9um_SessionEJBImpl_WLSkel.invoke(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
     at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
     at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
     at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
javax.ejb.EJBException: EJB Exception: ; nested exception is:
     java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.; nested exception is: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
     at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.unwrapRemoteException(RemoteBusinessIntfProxy.java:109)
     at weblogic.ejb.container.internal.RemoteBusinessIntfProxy.invoke(RemoteBusinessIntfProxy.java:91)
     at $Proxy0.removeEntity(Unknown Source)
     at model.SessionEJBClient.main(SessionEJBClient.java:71)
Caused by: java.lang.IllegalStateException: The method public abstract javax.persistence.EntityTransaction javax.persistence.EntityManager.getTransaction() cannot be invoked in the context of a JTA EntityManager.
     at weblogic.deployment.BasePersistenceContextProxyImpl.validateInvocation(BasePersistenceContextProxyImpl.java:121)
     at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:86)
     at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:91)
     at weblogic.deployment.BasePersistenceContextProxyImpl.invoke(BasePersistenceContextProxyImpl.java:80)
     at weblogic.deployment.TransactionalEntityManagerProxyImpl.invoke(TransactionalEntityManagerProxyImpl.java:26)
     at $Proxy141.getTransaction(Unknown Source)
     at model.SessionEJBBean.removeEntity(SessionEJBBean.java:60)
     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:597)
     at com.bea.core.repackaged.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:310)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.jee.spi.MethodInvocationVisitorImpl.visit(MethodInvocationVisitorImpl.java:37)
     at weblogic.ejb.container.injection.EnvironmentInterceptorCallbackImpl.callback(EnvironmentInterceptorCallbackImpl.java:55)
     at com.bea.core.repackaged.springframework.jee.spi.EnvironmentInterceptor.invoke(EnvironmentInterceptor.java:50)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
     at com.bea.core.repackaged.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
     at com.bea.core.repackaged.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
     at com.bea.core.repackaged.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
     at $Proxy143.removeEntity(Unknown Source)
     at model.SessionEJB_qxt9um_SessionEJBImpl.removeEntity(SessionEJB_qxt9um_SessionEJBImpl.java:142)
     at model.SessionEJB_qxt9um_SessionEJBImpl_WLSkel.invoke(Unknown Source)
     at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:589)
     at weblogic.rmi.cluster.ClusterableServerRef.invoke(ClusterableServerRef.java:230)
     at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:477)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:147)
     at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:473)
     at weblogic.rmi.internal.wls.WLSExecuteRequest.run(WLSExecuteRequest.java:118)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Process exited with exit code 0.

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My Results:
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OOL_SAMPLE
6420K
SAMPLE
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SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
6420K
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70K
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2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
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SQL> select segment_name, round(sum(bytes)/1024, 2) || 'K' as sotrage_consumed
2 from user_segments
3 where segment_name in ('SAMPLE', 'OOL_SAMPLE')
4 group by segment_name;
SEGMENT_NAME
SOTRAGE_CONSUMED
OOL_SAMPLE
20K
SAMPLE
10K

Deleting Multiple Rows From Multiple Tables As an APEX Process

Hi There,
I'm interesting in hearing best practice approaches for deleting multiple rows from multiple tables from a single button click in an APEX application. I'm using 3.0.1.008
On my APEX page I have a Select list displaying all the Payments made and a user can view individual payments by selecting a Payment from the Select List (individual items are displayed below using Text Field (Disabled, saves state) items with a source of Database Column).
A Payment is to be deleted by selecting a custom image (Delete Payments Button) displayed in a Vertical Images List on the same page. The Target is set as the same page and I gave the Request a name of DELETEPAY.
What I tried to implement was creating a Conditional Process On Submit - After Computations and Validations that has a source of a PL/SQL anonymous block as follows:
BEGIN
UPDATE tblDebitNotes d
SET d.Paid = 0
WHERE 1=1
AND d.DebitNoteID = :P7_DEBITNOTEID;
INSERT INTO tblDeletedPayments
( PaymentID,
DebitNoteID,
Amount,
Date_A,
SupplierRef,
Description
VALUES
( :P7_PAYMENTID,
:P7_DEBITNOTEID,
:P7_PAID,
SYSDATE,
:P7_SUPPLIERREF,
:P7_DESCRIPTION
DELETE FROM tblPayments
WHERE 1=1
AND PaymentID = :P7_PAYMENTID;
END;
The Condition Type used was Request = Expression 1 where Expression 1 had a value of DELETEPAY
However this process is not doing anything!! Any insights greatly appreciated.
Many thanks,
Gary.

...the "button" is using a page level Target,...
I'm not sure what that means. If the target is specified in the definition of a list item, then clicking on the image will simply redirect to that URL. You must cause the page to be submitted instead, perhaps by making the URL a reference to the javaScript doSubmit function that is part of the standard library shipped with Application Express. Take a look at a Standard Tab on a sample application and see how it submits the page using doSubmit() and emulate that.
Scott

Issue while deleting a row from a table

Dear friends,
i am getting an issue while deleting a row from a table, pls check screen shots , the first screen shot is my table contents
when i delete 2 row , the second row is deleting properly like below screen shot
but i want like below screen shot , Col1 contents should be like pic 1 . could any one pls let me know how to solve this issue.
Thanks
Vijaya

Hi vijaya,
please try this code, it will help you.
DATA : it_rows TYPE wdr_context_element_set,
          wa_rows LIKE LINE OF it_rows.
   DATA lo_nd_table TYPE REF TO if_wd_context_node.
    DATA lt_table TYPE wd_this->elements_table.
   DATA lo_el_table TYPE REF TO if_wd_context_element.
   DATA ls_vbap TYPE wd_this->element_table.
DATA: ld_index TYPE i.
data value TYPE sy-index.
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table= wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
* get element via lead selection
* alternative access via index
* lo_el_table = lo_nd_table->get_element( index = 1 ).
* @TODO handle not set lead selection
   IF lo_el_table IS INITIAL.
   ENDIF.
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table = wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
   lo_nd_table->get_static_attributes_table( IMPORTING table = lt_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
** @TODO compute values
** e.g. call a model function
* navigate from <CONTEXT> to <table> via lead selection
   lo_nd_table = wd_context->get_child_node( name = wd_this->wdctx_table ).
* @TODO handle non existant child
* IF lo_nd_table IS INITIAL.
* ENDIF.
** @TODO compute values
** e.g. call a model function
it_rows = lo_nd_table>get_selected_elements( ).
   CALL METHOD lo_nd_table->GET_LEAD_SELECTION_INDEX
   RECEIVING
     INDEX = value .
LOOP AT it_rows INTO wa_rows.
     CALL METHOD wa_rows->get_static_attributes
       IMPORTING
              static_attributes = ls_table.
     READ TABLE lt_table INTO ls_table WITH KEY col1 = ls_table-col1.
      ld_index = value.
          ENDLOOP.
   CLEAR : ls_table-col2,
         ls_table-col2.
   MODIFY lt_table INDEX ld_index FROM ls_table.
lo_nd_table->bind_table( new_items = lt_table set_initial_elements = abap_true ).

Best practice for deleting multiple rows from a table , using creator

Hi
Thank you for reading my post.
what is best practive for deleting multiple rows from a table using rowSet ?
for example how i can execute something like
delete from table1 where field1= ? and field2 =?
Thank you

Hi,
Please go through the AppModel application which is available at: http://developers.sun.com/prodtech/javatools/jscreator/reference/codesamples/sampleapps.html
The OnePage Table Based example shows exactly how to use deleting multiple rows from a datatable...
Hope this helps.
Thanks,
RK.

How to delete the data from partition table

Hi all,
Am very new to partition concepts in oracle..
here my question is how to delete the data from partition table.
is the below query will work ?
delete from table1 partition (P_2008_1212)
we have define range partition ...
or help me how to delete the data from partition table.
Thanks
Sree

874823 wrote:
delete from table1 partition (P_2008_1212)This approach is wrong - as Andre pointed, this is not how partition tables should be used.
Oracle supports different structures for data and indexes. A table can be a hash table or index organised table. It can have B+tree index. It can have bitmap indexes. It can be partitioned. Etc.
How the table implements its structure is a physical design consideration.
Application code should only deal with the logical data structure. How that data structure is physically implemented has no bearing on application. Does your application need to know what the indexes are and the names of the indexes,in order to use a table? Obviously not. So why then does your application need to know that the table is partitioned?
When your application code starts referring directly to physical partitions, it needs to know HOW the table is partitioned. It needs to know WHAT partitions to use. It needs to know the names of the partitions. Etc.
And why? All this means is increased complexity in application code as this code now needs to know and understand the physical data structure. This app code is now more complex, has more moving parts, will have more bugs, and will be more complex to maintain.
Oracle can take an app SQL and it can determine (based on the predicates of the SQL), which partitions to use and not use for executing that SQL. All done totally transparently. The app does not need to know that the table is even partitioned.
This is a crucial concept to understand and get right.

How to delete a column from the table control in module pool?

Hi,
can any one please tell How to delete a column from the table control in module pool?
thanks in advance
warm regards
HareeshKumar N

hi hareesh,
I think it is better to hide it.
How to hide: You can check this link
Dynamic Hide column in table control

How to delete a record from BSEG table

Dear Experts,
How to delete a record from BSEG table.
If there possible to delete some records from transparent table ?
Please help.
Regards,
Tan

Hi,
Deleting a record from a standard table can be done only if table maintenance exists - Cehck tcode - SM30. But it is not advisable to delete records, coz the records may be dependent on many other tables. If u delete in a single place, there may be chance that inconsistency in the data happens and hence will affect ur financial statements.
Pls. assign points, if useful
Regards,
Sridevi

How to compare two rows from two table with different data

how to compare two rows from two table with different data
e.g.
Table 1
ID   DESC
1     aaa
2     bbb
3     ccc
Table 2
ID   DESC
1     aaa
2     xxx
3     ccc
Result
2

Create
table tab1(ID
int ,DE char(10))
Create
table tab2(ID
int ,DE char(10))
Insert
into tab1 Values
(1,'aaa')
Insert
into tab1 Values
(2,'bbb')
Insert
into tab1 Values(3,'ccc')
Insert
into tab1 Values(4,'dfe')
Insert
into tab2 Values
(1,'aaa')
Insert
into tab2 Values
(2,'xx')
Insert
into tab2 Values(3,'ccc')
Insert
into tab2 Values(6,'wdr')
SELECT
tab1.ID,tab2.ID
As T2 from tab1
FULL
join tab2 on tab1.ID
= tab2.ID
WHERE
BINARY_CHECKSUM(tab1.ID,tab1.DE)
<> BINARY_CHECKSUM(tab2.ID,tab2.DE)
OR tab1.ID
IS NULL
OR
tab2.ID IS
NULL
ID column considered as a primary Key
Apart from different record,Above query populate missing record in both tables.
Result Set
ID ID
2 2
4 NULL
NULL 6
ganeshk

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