Commit of master-detail view with database trigger on update
[ADF Jdev11 question]
My case is the following:
I have master form, with detail table attatched to it (using view link).
On update of master table, there is a database trigger which makes changes in the detail table.
As commit action commits both of the tables, as a result, I get the following exception:
"Another user has changed the row with primary key oracle.jbo.Key[000000002017 ]. "
Do you have any suggestions how can I fix this? Is there a way I can refresh the detail table just after the commit of the master table?
Marking the updated attributes with "refresh after update" doesn't help at all.
This trigger is on update of the master table and that is what it does:
BEGIN
UPDATE detail_table
SET smolotpr = :NEW.molotpr,
smolpol = :NEW.molpol,
spoluch = :NEW.poluch,
sotpr = :NEW.otpr,
SMAKET = :NEW.MAKET,
sdata_period = :NEW.data_period
WHERE doknom = :NEW.doknom;
END;
Setting the updated attributes "Refresh after update+insert" to true doesn't help at all (maybe because they are in another table)!
I will be very grateful if you give me any ideas, advice or give the complete solution!
Similar Messages
-
Master detail view with drill down
I am trying to develop a simple app for my Ipad. This app is supposed to have a Master/details look and should behave similar to the native Mail app (2x levels of navigation and the last level updates the details view).
My problem is that I am not familiar to Apple IOS development so tend to get stuck all the time so I prefer to follow a tutorial or start with a sample project. I have searched for hours but I always either get a pure navigation drill down project without the details view or a pure master/details project with only a single level of navigation. I tried to take these projects and modify them but my knowledge sadly is very limited and I did not succeed.
So can anybody direct me to a tutorial or a sample project where a Mail like app is being built with more than 1 level of navigation ?I have a GridBagLayout panel with a jtable and some jtextfield Well, we don't know exactly what constraints you have set up to its hard to say exactly why its happening.
In general, you should create your JTextField using new JTextField(int) and I think the problem will go away.
An easier solution would also be to use different LayoutManagers to achieve the desired layout. -
3 Levels Master Detail View Object with Java class interface
Hi Developers,
I've created 3 tables with one to many relations as below
BOARD ------<- APPLICANT ------<- QUALIFICATION
a board includes many applicants and an applicant includes many qualifications.
When I add these tables to a Fusion Project, JDeveloper 11g helps me to add the Entity Links and View Associations automatically.
Then, I defined these relations in an ApplicantModule's Data Model as below.
[+] BoardVO1
|
|--[+] ApplicantVO1
|
|--[+] QualificationVO1The problem is: I cannot write any function in QualificationVO and publish it by client interface.
I created a simple function with a single line (System.out.println(...) ) in QualificationVOImpl.java. and selected it in Client Interface. But when I execute it from the ApplicantionModel for testing, an oracle.jbo.NoObjException JBO-25003 is raised. with message: Object ... ApplicantVO1 of type ApplicationModule not found.
Has anyone tried to implement some coding in the third level of a master details view structure as my example? How do you make it works?
I'm using JDeveloper 11.1.1.3 with ADF BC.
Regards,
Samson FuSamson,
Looks like a bug (probably with the application module tester). I created your tables:
create table board(board_id number primary key not null);
create table applicant(applicant_id number primary key not null, board_id number not null);
create table qualification(qualification_id number primary key not null, aplicant_id number not null);
alter table applicant add a_fk foreign key(board_id) references board;
alter table qualification add q_fk foreign key(aplicant_id) references applicant;I created a JDev project and got the same results. I've e-mailed a test case off to Frank.
Frank - the method is indeed exposed on the VO instance, and I tried testing that way, but the AM tester gives the error as if it is looking for an AM instance with the VO's name.
John -
Performance Problem with Master-Detail Views
Hi,
I have developed a JSP-Applikcation with the master-detail views.
I would like to report a bad performance at fetching data records from the detail view, because all records
from master view have firstly to be retrieved to locate right row (rangesize="-1"). The number of records in
the master table ist 2500 and 7000 in detail table.
============= Code Snippets (See HOWTO:Navigate using Data Tags of J. Oropeza) =====
<jbo:DataSource id="dsMaster appid=testAppId viewobject="MaterView" rangesize="-1">
<jbo:RefreshDataSource datasource="dsMaster">
<jbo:Row id="msRow" datasource="dsMaster" action="Find" rowkeyparam="RowkeyValue">
<jbo:dataSource id="dsDetail" appid="testAppId viewobject="DetailView">
======================================================================
When rangesize="20" sets, performance is good, but the right row location of master view ist not found if the row
is not positoned in this range (No data from detail view object are displayed).
How can I improve the performance?
Many thanks for your help.
regards,
YooSung:
Thank you for your suggestion.
According to your suggestion I have changed my BC4J/JSP-application. However, the performance ist still bad.Whenn I click on a row retrieved from the master view, it takes 15 seconds until the associated data in detail view will be displayed on the other window (The application has been deployed on the test system of ISP).
In an other case with much less data (162 master and 228 detail rows), it takes only 2 seconds (The application
goes with the local server and DB of our company).
======================== master.jsp =================================
<jbo:DataSource id="dsMaster appid=testAppId viewobject="MaterView" >
<a href="detail.jsp?RowKeyValue=<jbo:ShowValue datasource="dsMaster" dataitem="RowKey"/>">
Here Click
</a>
======================== detail.jsp ======================================
<jbo:DataSource id="dsMaster appid=testAppId viewobject="MaterView">
<jbo:RefreshDataSource datasource="dsMaster">
<jbo:Row id="msRow" datasource="dsMaster" action="Find" rowkeyparam="RowkeyValue">
<jbo:dataSource id="dsDetail" appid="testAppId viewobject="DetailView">
How do you think of this coding (My application is based on the document How to of J. Oropeza)?
How can I increase the performance independently of the number of rows?
Many thanks for your help.
regards,
Yoo -
Date validation in a master/detail view
Hi everyone,
I have a problem and I hope someone can help me. I'm trying to create a validation for my application. I have a Master/Detail view where I add rows to my database and in the rows there is a "from date" and "to date". I want to create a validation so that the "from date" can not be chosen before the current date.
I'm having trouble because most of the tutorials I read on this work with page items, but since I have this in a Master/Detail view I have Column Attributes, wich do not behave the same way as page items.
Any help would be very appreciated.
Thanks,
LukaI'm still having quite some trouble with this... everything I try gives me some sort of error.
My latest attempt was to make a PL/SQL returning boolean validation with the code:
FOR i IN 1..APEX_APPLICATION.G_F10.COUNT LOOP
IF DATUM_OD(APEX_APPLICATION.G_F10(i), 'DD.MM.YYYY HH24:MI') < SYSDATE THEN
return true;
else
return false;
END IF;
END LOOP;
and it says:
Error processing validation.
ORA-06550: line 2, column 4: PLS-00201: identifier 'DATUM_OD' must be declared ORA-06550: line 2, column 1: PL/SQL: Statement ignored -
Detail view with bind variable. TreeTable not showing all detail result.
I’m having trouble with treeTable using detail view with bind variables and where clause defined in VO definition.
Both, master and detail view objects, base on the same entity and have the same condition in where clause. The view objects also have bind variables, which are set in prepareRowSetForQuery() method.
Again, these are two different views, that get different result, based on value of one of the bind variable.
When I show results in two different tables on jsf page, where master table has "RowSelection" set on "single", all results are displayed in detail table.
But when I use treeTable, only the first result of the detail is shown.I tested it in applicationModule and it works, but i think that's the same as two tables on a jsf page.
This is the order in which overridden methods are called in ADF BC or two tables on jsf page
when clicking on row in master table.
PrepareRowSetForQueryDetail
executeQueryForCollection_Detail user param: 2
Object 2: class [Ljava.lang.Object; -> print of the object2[] parameter in executeQueryForCollection
List 0: Bind_ChildId -> viewLink parameter
List 1: 400035313 -> viewLink parameter value
getEstimatedRowCount_Detail
count: 2
getEstimatedRowCount_Detail
count: 2 And when i click on "expand node" in tree table:
getEstimatedRowCount_Root
count: 2
PrepareRowSetForQuery_Detail
executeQueryForCollection_Detail user param: 2
Object 2: class [Ljava.lang.Object;
List 0: Bind_ChildId -> viewLink parameter
List 1: 400035321
PrepareRowSetForQueryDetail
executeQueryForCollection_Detail user param: 2
Object 2: class [Ljava.lang.Object;
List 0: Bind_ChildId -> viewLink parameter
List 1: 400035313
getEstimatedRowCount_Root
count: 2
getEstimatedRowCount_Root
count: 2
getEstimatedRowCount_Root
count: 2
PrepareRowSetForQueryDetail
executeQueryForCollection_Detail user param: 2
Object 2: class [Ljava.lang.Object;
List 0: Bind_ChildId -> viewLink parameter
List 1: 400035313
PrepareRowSetForQueryDetail
executeQueryForCollection_Detail user param: 2
Object 2: class [Ljava.lang.Object;
List 0: Bind_ChildId -> viewLink parameter
List 1: 400035321
getEstimatedRowCount_Root
count: 2
getEstimatedRowCount_Root
count: 2Values of user parameters are OK. Is there another method that i should override?
I also noticed, that if detail view doesn't have user bind variables, the tree works fine and is shown even in ADF BC (aplication module).
I guess we loose a tree, when using bind variables in detail view object.
Is there a way around it? -
Can there be multiple Master Detail Views, if yes then how? Please suggest
Dear All,
In first master-detail view, I have a button, which when clicked will trigger the second detail view.
I tried invoking second master detail view but was not able to see the second master view. Could you please guide as to how to go about this.
Thanks.Do a Google search. Here's one link.
http://mobiforge.com/developing/story/developing-split-view-based-apps-ipad
Cheers, Tom -
Problem occured when create a tree table for master-detail view objects using SQL queries?
I am programming a tree table for master-detail view objects using SQL queries and these 2 view objects are not simple singel tables queries, and 2 complex SQL are prepared for master and view objects. see below:
1. Master View object (key attribute is SourceBlock and some varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK,
sum(
case when cntr_list.cntr_size_q = '20'
then cntr_list.cntr_qty
else 0 end ) as cntr20 ,
sum(
case when cntr_list.cntr_size_q = '40'
then cntr_list.cntr_qty
else 0 end ) as cntr40 ,
sum(
case when cntr_list.cntr_size_q = '45'
then cntr_list.cntr_qty
else 0 end ) as cntr45
FROM (
SELECT yb1.BLOCK_M as SOURCE_BLOCK,
scn.CNTR_SIZE_Q,
count(scn.CNTR_SIZE_Q) AS cntr_qty
FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
WHERE
scm.cmr_n = scn.cmr_n
AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
AND scm.shift_mode_c = :ShiftModeCode
AND scm.end_terminal_c = :TerminalCode
AND scm.start_terminal_c = yb1.terminal_c
AND scm.start_block_n = yb1.block_n
AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
AND scm.end_terminal_c = yb2.terminal_c
AND scm.end_block_n = yb2.block_n
AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
AND scn.status_c not in (1, 11)
AND scn.shift_type_c = 'V'
AND scn.source_c = 'S'
GROUP BY yb1.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK
2. Detail View object (key attributes are SourceBlock and EndBlock and same varaible bindings are used for this view object.)
SELECT cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK,
sum(
case when cntr_list.cntr_size_q = '20'
then cntr_list.cntr_qty
else 0 end ) as cntr20 ,
sum(
case when cntr_list.cntr_size_q = '40'
then cntr_list.cntr_qty
else 0 end ) as cntr40 ,
sum(
case when cntr_list.cntr_size_q = '45'
then cntr_list.cntr_qty
else 0 end ) as cntr45
FROM (
SELECT yb1.BLOCK_M as SOURCE_BLOCK,
yb2.BLOCK_M as END_BLOCK,
scn.CNTR_SIZE_Q,
count(scn.CNTR_SIZE_Q) AS cntr_qty
FROM SHIFT_CMR scm, SHIFT_CNTR scn, YARD_BLOCK yb1, YARD_BLOCK yb2
WHERE
scm.cmr_n = scn.cmr_n
AND (scm.plan_start_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS')
OR scm.plan_end_dt BETWEEN to_date(:DateFrom,'YYYY/MM/DD HH24:MI:SS') AND to_date(:DateTo,'YYYY/MM/DD HH24:MI:SS'))
AND scm.shift_mode_c = :ShiftModeCode
AND scm.end_terminal_c = :TerminalCode
AND scm.start_terminal_c = yb1.terminal_c
AND scm.start_block_n = yb1.block_n
AND substr(scn.start_location_c,(instr(scn.start_location_c,',',1,5)+1),instr(scn.start_location_c,',',1,6)-(instr(scn.start_location_c,',',1,5)+1)) BETWEEN yb1.slot_from_n AND yb1.slot_to_n
AND scm.end_terminal_c = yb2.terminal_c
AND scm.end_block_n = yb2.block_n
AND substr(scn.end_location_c,(instr(scn.end_location_c,',',1,5)+1),instr(scn.end_location_c,',',1,6)-(instr(scn.end_location_c,',',1,5)+1)) BETWEEN yb2.slot_from_n AND yb2.slot_to_n
AND scn.status_c not in (1, 11)
AND scn.shift_type_c = 'V'
AND scn.source_c = 'S'
GROUP BY yb1.BLOCK_M, yb2.BLOCK_M, scn.CNTR_SIZE_Q
) cntr_list
GROUP BY cntr_list.SOURCE_BLOCK, cntr_list.END_BLOCK
3. I create a view link to create master-detail relationship for these 2 view objects.
masterview.SourceBlock (1)->detailview.SourceBlock (*).
4. I create a tree table using these 2 view objects with master-detail relationship.
When I set default value for variable bindings of these 2 view objects and the matching records exist, tree table can work well. I can expand the master row to display detail row in UI.
But I need to pass in dymamic parameter value for variable bindings of these 2 view objects, tree table cannnot work again. when I expand the master row and no detail row are displayed in UI.
I am sure that I pass in correct parameter value for master/detail view objects and matching records exist.
Managed Bean:
DCIteratorBinding dc = (DCIteratorBinding)evaluteEL("#{bindings.MasterView1Iterator}");
ViewObject vo = dc.getViewObject();
System.out.println("Before MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
System.out.println("Before MasterView1Iterator ShiftModeCode="+ vo.ensureVariableManager().getVariableValue("ShiftModeCode"));
vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
vo.executeQuery();
System.out.println("MasterView1Iterator vo.getEstimatedRowCount()="+ vo.getEstimatedRowCount());
DCIteratorBinding dc1 = (DCIteratorBinding)evaluteEL("#{bindings.DetailView1Iterator}");
ViewObject vo1 = dc1.getViewObject();
System.out.println("Before DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
System.out.println("Before DetailView1Iterator ShiftModeCode="+ vo1.ensureVariableManager().getVariableValue("ShiftModeCode"));
vo1.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
vo1.ensureVariableManager().setVariableValue("DateTo", dateTo);
vo1.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
vo1.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
vo1.executeQuery();
System.out.println("after DetailView1Iterator vo1.getEstimatedRowCount()="+ vo1.getEstimatedRowCount());
5. What's wrong in my implementation? I don't have no problem to implement such a tree table if using simple master-detail tables view object, but now I have to use such 2 view objects using complex SQL for my requirement and variable bindings are necessary for detail view object although I also think a bit strange by myself.Hi Frank,
Thank you and it can work.
public void setLowHighSalaryRangeForDetailEmployeesAccessorViewObject(Number lowSalary,
Number highSalary) {
Row r = getCurrentRow();
if (r != null) {
RowSet rs = (RowSet)r.getAttribute("EmpView");
if (rs != null) {
ViewObject accessorVO = rs.getViewObject();
accessorVO.setNamedWhereClauseParam("LowSalary", lowSalary);
accessorVO.setNamedWhereClauseParam("HighSalary", highSalary);
executeQuery();
but I have a quesiton in this way. in code snippet, it is first getting current row of current master VO to determine if update variables value of detail VO. in my case, current row is possibly null after executeQuery() of master VO and I have to change current row manually like below.
any idea?
DCIteratorBinding dc = (DCIteratorBinding)ADFUtil.evaluateEL("#{bindings.SSForecastSourceBlockView1Iterator}");
ViewObject vo = dc.getViewObject();
vo.ensureVariableManager().setVariableValue("DateFrom", dateFrom);
vo.ensureVariableManager().setVariableValue("DateTo", dateTo);
vo.ensureVariableManager().setVariableValue("ShiftModeCode", shiftModeC);
vo.ensureVariableManager().setVariableValue("TerminalCode", terminalCode);
vo.executeQuery();
vo.setCurrentRowAtRangeIndex(0);
((SSForecastSourceBlockViewImpl)vo).synchornizeAccessorVOVariableValues(); -
ADFBC JTree Master-Detail view
Hello, I am using Jdeveloper 10.1.3.3. with ADFBC.
I have table ORGUNIT with following fields:
1. ID_ORGUNIT
2. NAME
3. ID_PARENT_ORGUNIT
I have created Entity and View for this table, and ViewLink which is used for fields ID_ORGUNIT and ID_PARENT_ORGUNIT.
In short, I am trying to create JTree which contains data about organizational units.
Let's say these are my data:
1. "ADM" "ADMINISTRATION" "NULL"
2. "FIN" "FINANCING DEPARTMENT" "NULL"
3. "FIN1" "FINANCING DEPARTMENT - XXX" "NULL"
4. "FIN2" "FINANCING DEPARTMENT - YYY" "NULL"
5. "DEV" "DEVELOPMENT DEPARTMENT" "NULL"
So, I want to use JTree to create hierarchy:
ADM
I--FIN
I I--FIN1
I I--FIN2
I
I--DEV
The problem is, when I create view link previously described...I get all data from view with their descendants...
ADM
I--FIN
I I--FIN1
I I--FIN2
I
I--DEV
FIN
I--FIN1
I--FIN2
FIN1
FIN2
DEV
Can anyone help me? What could be the problem?Hi John,
Thank you for your assistance.
Just to confirm the details of what I have.
Master VO: CustomerVO (based on customer table) correct!>Child VO: A VO based on a join between preferences and customer_preferences. (i.e. base your VO on two EO's) correct!what I have is a customer VO based on a customer EO, a customer_preferencesVO based on a customer_preferencesEO and a preferencesVO based on a preferencesEO.
View links exist between customerVO and customer_preferencesVO and again between preferences and customer_preferences thus facilitating a many-to-many relationship.
so what I'm trying to do is construct a master detail view between customers and preferences . I figured that in order to achieve this I would need to create two new VO instances, one for customers and one for preferences and then to probable use a statement in the where clause so that only preferences are returned for customers on the current row where a relationship exist via the customer_preverencesVO.
This is where I'm struggling in understanding how best to implement this.
All I want is a mechanism whereby when I come to use a tree view component in my UI model I will have a node that will display preferences.
Thanks again,
Gary -
Master Detail Form with Report - Referring a column in another table
I have master detail form with a report option. The master table has a column that also references a look up table.
When the report is displayed the lookup column id is displayed. Rather I want to get the look-up value from a lookup table
and display in the report.
When I see the report region Query definition , it just has the columns to add/remove only from the master table.
Could you pls help me with this regard.
Eg :
Dept Table
dept_id
dept_name
location_id
Employee Table
employee_id
employee_name
dept_id
location
location_id_id
location_name
Master is Dept, Detail is dept and lookup table is location.Simply add the lookup table to the FROM clause and join its PK with the FK in the master table in your query. That's basic SQL, and you definitely must get a good grasp of SQL to do more than very basic work in APEX.
For a good example, please see http://download.oracle.com/docs/cd/E10513_01/doc/appdev.310/e10498/build_app.htm#BCEBJJGB
While you're at it, read and implement the tasks outlined in the 2 Day + Application Express Developer's Guide - http://download.oracle.com/docs/cd/E10513_01/doc/appdev.310/e10498/toc.htm. After that, read the "Oracle Application Express 3.0-- Building a Functional Application" OBE in http://www.oracle.com/technology/obe/apex/obe30/apexdev30.htm - great stuff.
Georger -
Master/Detail Viewer Application in Web Dynpro ABAP
Hello @ll,
i search a Master/Detail Viewer Application in Web Dynpro ABAP like this in WEB Dynpro Java (show below).
http://help.sap.com/saphelp_nw04/helpdata/en/84/8bc1a36a38da41a46517b114ca0974/frameset.htm
Have anyone a tutorial or can help how i config the event "onLeadSelect".
I create a master- and detail table done all context mapping.
Thanks in advance
regards
arminHi Armin,
Please go through
http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/7a89b067-0801-0010-8192-a9896a60938e?quicklink=index&overridelayout=true
Thanks,
Prahsant -
Creating master details application with views!
Hi All,
I have a requirement to create the master details with the views, but when I was trying to create the master details its asking me for Master Table name & detail table name. Here I am giving the master table name in place of detail table name I am using view but its not showing my view in query builder, my view is already there in the database
any idea why its not showing my view?
Thanks,
Suma.Hi Claudia,
I am so sorry, but I do not check the Oracle forums every day. I am under presser, because have to relocate from Bulgaria to the USA through the end of November.
Shortly, any view could be updatable under many restrictions. I suppose, that is the reason for the errors. I don’t know what kind of connection you have between those two tables.
Under all these circumstances, I’ll offer you to build first a form on the base of the first table which all columns are used. Then you can test, refine, and finish all details about it.
Second, you can Create Page Computation retrieving the column (value, if any) from the second table.
Third, you should Create Page Process on Submit of type “PL/SQL anonymous block”, which will INSERT the calculated (entered) value into second table.
You gain:
1. Full power of ApEx to build automatically forms and reports.
2. Min. manual work.
3. You can use the select statement from the view to build your SQL query.
4. You are able to build and test that part of the application step by step.
Konstantin
[email protected] -
Insert a row in master detail view & jboRowKey parameter
Hi
I hava a minor problem.
On JSP page I have edit form for master view, beyond edit form is browse of detail view. I would like to insert or edit a row on master view and after update and commit, a would like to stay on the same page to insert some rows into detail view.
When I editing rows it is Ok, becose jboRowKey parameter is always the same (to find proper row on master view).
Problem appears when I want to Insert a row into master view, becose after transaction is commited, jboRowKey parameter is changed.
Primary key on master table is sequence and it is inserted by (preinsert) trigger before commit.
If anybody has some idea to solve this problem, please help.
GorazdWithout knowing exactly the technology you are using, (JDev version, BC4J JSP tags/Components tags?),
In general with BC4J after you do a commit, you do not necessarily have a record pointer on the new record that you just insert on the master table, so you would have to locate it again.
Here is one way you could do this.
After you commit your new inserted record, you could go back to a master "browse" page which shows the records of your master table along with a link to it's corresponding detail page. Encoded in the link you could pass the rowkey of the master record as a parameter and then in the detail page you could locate the master record that was clicked on by using the Find operation of the Row tag. When the master row is located, you automatically would be pointing to the correct detail records.
In this case since the master was just created, there wouldn't be any detail records yet. You could then create new detail records for the new master..
Let me know if this helps..
-Chris -
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 CretanHi, 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. -
Master/Details tables with CASCADE delete giving "table mutating" error
Hi,
I have two tables in a master/details configuration (table 1 is "master", table 2 is "details").
The details has a FK contraint relation to the master with a CASCADE delete (so when the master is deleted, all associated details are deleted).
The master table has a column "last_updated_datetime" which is updated by a master table update trigger whenever most (excluding the last_updated_datetime column) columns are updated.
The details table has an update trigger which also updates the master table's last_updated_datetime column (whenever a detail row is changed).
The details table also has a delete trigger which also updated the master table's last_updated_datetime column (whenever a detail row is deleted).
The problem I have is: When the master record is deleted, which cascade deletes the details record(s), the delete trigger on the details table throws a "table is mutating" error.
I understand that the "mutating" error is "correct" because the master record is being deleted.
But is there some way I can get around this problem (for example, having the details table delete trigger not update the master table last_updated_datetime) when it's this cascade delete?
Thanks for your help!create table master (
id number primary key,
changed date not null
create table detail (
id number primary key,
master_id references master (id) on delete cascade
create or replace package pkg is
master_deleted boolean := false;
end;
create or replace trigger bds_master
before delete on master
begin
pkg.master_deleted := true;
end;
create or replace trigger ads_master
after delete on master
begin
pkg.master_deleted := false;
end;
create or replace trigger adr_detail
after delete on detail
for each row
begin
if not pkg.master_deleted then
update master
set changed = sysdate
where id = :old.master_id;
end if;
end;
insert into master values (1, sysdate - 10);
insert into detail values (11, 1);
insert into detail values (12, 1);
insert into master values (2, sysdate - 10);
insert into detail values (21, 2);
insert into detail values (22, 2);
insert into master values (3, sysdate - 10);
insert into detail values (31, 3);
insert into detail values (32, 3);
commit;
select * from master order by id;
ID CHANGED
1 01.09.08
2 01.09.08
3 01.09.08
select * from detail order by id;
ID MASTER_ID
11 1
12 1
21 2
22 2
31 3
32 3
delete detail where id = 21;
select * from master order by id;
ID CHANGED
1 01.09.08
2 11.09.08
3 01.09.08
select * from detail order by id;
ID MASTER_ID
11 1
12 1
22 2
31 3
32 3
delete master where id in (1, 2);
select * from master order by id;
ID CHANGED
3 01.09.08
select * from detail order by id;
ID MASTER_ID
31 3
32 3 Regards,
Zlatko
Edited by: Zlatko Sirotic on Sep 11, 2008 11:15 PM
This is disaster - ten attempts to format code!
Maybe you are looking for
-
My iphone 5s consumed 10GB data this what's wrong with my VPN kindly guide suitably moreover battery drain fast
-
How to do a magic wand tool like photoshop with java?
in a JPanel,a bufferedImage with a great many colors show in it. now,i want to select a region with same color use a magic wand tool ,just like photoshop,how to do it? Thanks.
-
Is there a way to adjust the sensitivity of the LG Extravert phone keypad?
having trouble with the keypad entering several of the same letters at the same time. Is there a way to adjust the sensitivity?
-
Dear Guru, We are doing system copy of DEV to QAS, facing issue on Start instance phase. Error msg : Connect to message server (hostname/3900) failed: NIECONN_REFUSED ABAP processes of instance SID/DVEBMGS00 [ABAP: MSNOTRUNNING] did not start after 1
-
Apologies if I've posted in the wrong forum. I am not quite sure where this question belongs. My mother still uses the ancient Rolodex (see picture below) for her contact information. I would like to transfer this information to her computer as an