Updates to a complex view

SQL Developer version 3.0.04 on XP Pro
We are able to use the data grid to update the values of views that are inherently updatable, no problem.
We have a complex view with an associated instead-of-update trigger. We are able to update this complex view using an UPDATE statement, no problem.
We would like to be able to update the complex view using the data grid (just in case I am mixing up the terminology, by "data grid" I mean the interface you get when you select the view from the navigation pane and then click the "Data" tab), but the fields are read only.
Is there a configuration option that we can use to enable this? Or, some sort of workaround? Or, are we simply not able to update complex views using the data grid?
Thanks!
-Tom

i think u need to change ur application structurei don't think so. Create an INSTEAD-OF-trigger on your view and manage the splitting there. In forms, you wil have to set the property "Primary Key" for the pk-item's to "Yes" and eventually you have to create an ON-LOCK-trigger

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How to update or delete records in a Complex View in Forms?

Hi,
I have a requirement to create a Form by using Complex View. Insertion is possible but updation and deletion is not working properly . I got FRM-40501 Error. I need How to update or delete records in a Complex View in Forms?
Thanks & Regards,
Hari Babu

Depending on how complex your view is, forms is not able to determine how to appropiately lock a record, when you try to update or delete a record.
One approach to using complex views in forms:
1. Set the Key-mode of the block to "Non-Updateable"
2. Mark the column which can be used to build the WHERE-condition to uniquely identify a record with "Primary Key" = "Yes"
3. For doing INSERT, UPDATE and DELETE, create an INSTEAD-OF-trigger on the view.
4. Create your own ON-LOCK-trigger in forms which does the locking of the records to update.

Complex views can be updatable?

I am having one complex view i need to update at run time for that view dipendent table. how can It possible

from the free, online SQLmanual, the CREATE VIEW chapter, Notes on Creating Updatable Views
An updatable view is one you can use to insert, update, or delete base table rows. You can create a view to be inherently updatable, or you can create an INSTEAD OF trigger on any view to make it updatable.
To learn whether and in what ways the columns of an inherently updatable view can be modified, query the USER_UPDATABLE_COLUMNS data dictionary view. (The information displayed by this view is meaningful only for inherently updatable views.)
If you want the view to be inherently updatable, it must not contain any of the following constructs:
A set operator
A DISTINCT operator
An aggregate or analytic function
A GROUP BY, ORDER BY, CONNECT BY, or START WITH clause
A collection expression in a SELECT list
A subquery in a SELECT list
Joins (with some exceptions as described in the paragraphs that follow).
In addition, if an inherently updatable view contains pseudocolumns or expressions, you cannot update base table rows with an UPDATE statement that refers to any of these pseudocolumns or expressions.
If you want a join view to be updatable, all of the following conditions must be true:
The DML statement must affect only one table underlying the join.
For an INSERT statement, the view must not be created WITH CHECK OPTION, and all columns into which values are inserted must come from a key-preserved table. A key-preserved table in one for which every primary key or unique key value in the base table is also unique in the join view.
For an UPDATE statement, all columns updated must be extracted from a key-preserved table. If the view was created WITH CHECK OPTION, join columns and columns taken from tables that are referenced more than once in the view must be shielded from UPDATE.
For a DELETE statement, if the join results in more than one key-preserved table, then Oracle deletes from the first table named in the FROM clause, whether or not the view was created WITH CHECK OPTION.

How to insert new record or update existing record using a complex view?

Currently I created this screen, there is no problems on display data, only on the update funtionality (it means insert / update / delete on the table for which the view is based on).
I have a table and a complex view in order to display the information from the table in a tabellar form (i.e up to 70 record in same "record" in the form, one for each item)
The view is like this
select a.f1, a.f2, get_value(a.pk1,1) a1, get_value(a.pk1,2) a2, get_value(a.pk1,3) a3............
from my_table a
where a.proj_id = user
and I want to permit the update of the field a1, a2, a3 in a multiposition canvas (tabellar).
I created an INSTEAD-OF trigger.
But it not work only in the form. I receive the error FRM-40654 when I try to change the existing value in the running form based on that view.
The view is woking and updatable using sql-plus.
If I query
select * from ALL_UPDATABLE_COLUMNS where table_name = 'SPV_BOQ_BOM_POS_ACTIVITIES';
in which 'SPV_BOQ_BOM_POS_ACTIVITIES' is the name of my view.
The question is: why if the view is updatable using SQL*Plus, is not updatable using Oracle Form 10gR2 ?
Someone could help me asap?
Thanks

I removed on the datablock three items that are not showed, one of this is the Sysdate of update on the table for which the view is based.
I removed also the on-lock trigger and the update from the form is NOT working fine.
But for now I can still mantaing the ON-LOCK trigger.
Is not a priority to remove this trigger.
I still have the problem when the field is null, it mean that in the table SP_BOQ_BOM_POS_ACTIVITIES the record not exist.
I try now to explayn better.
SPV_BOQ_BOM_POS_ACTIVITIES is the name of the view.
SP_BOQ_BOM_POS_ACTIVITIES is the name of the table.
This are the desc
desc SPV_BOQ_BOM_POS_ACTIVITIES
Describing SPV_BOQ_BOM_POS_ACTIVITIES....
NAME Null? Type
BOQ_HEADER_ID NOT NULL NUMBER(12,0)
BB_ID NOT NULL NUMBER(12,0)
BOQ_ID NOT NULL NUMBER(12,0)
PROJ_ID NOT NULL VARCHAR2(10)
ACT_GROUP_CODE VARCHAR2(30)
TOTAL_QTY NUMBER
ACT_CODE_1 VARCHAR2(4000)
QTY_1 NUMBER
ACT_CODE_2 VARCHAR2(4000)
QTY_2 NUMBER
ACT_CODE_3 VARCHAR2(4000)
QTY_3 NUMBER
ACT_CODE_4 VARCHAR2(4000)
QTY_4 NUMBER
ACT_CODE_5 VARCHAR2(4000)
QTY_5 NUMBER
ACT_CODE_6 VARCHAR2(4000)
QTY_6 NUMBER
USR_ID NOT NULL VARCHAR2(10)
LMOD NOT NULL DATE
INT_REV NOT NULL NUMBER(6,0)
The field QTY_1, QTY_2.... QTY_6 are calculated with a customer stored function from the table SP_BOQ_BOM_POS_ACTIVITIES.
Also the field ACT_CODE_1, ACT_CODE_2, .... ACT_CODE_6 are calculated with a customer stored function from the table SP_BOQ_BOM_POS_ACTIVITIES.
desc SP_BOQ_BOM_POS_ACTIVITIES
Describing SP_BOQ_BOM_POS_ACTIVITIES....
NAME Null? Type
BBPA_ID NOT NULL NUMBER(12,0)
BOQ_HEADER_ID NOT NULL NUMBER(12,0)
BB_ID NOT NULL NUMBER(12,0)
BOQ_ID NOT NULL NUMBER(12,0)
PROJ_ID NOT NULL VARCHAR2(10)
ACT_GROUP_CODE NOT NULL VARCHAR2(30)
ACT_CODE NOT NULL VARCHAR2(30)
QTY NUMBER(12,0)
FLG_MANUAL_CHANGE VARCHAR2(1)
USR_ID NOT NULL VARCHAR2(10)
LMOD NOT NULL DATE
INT_REV NOT NULL NUMBER(6,0)
If I use SQL Navigator this insert working fine
insert into SPV_BOQ_BOM_POS_ACTIVITIES
(BOQ_HEADER_ID, BB_ID, BOQ_ID, PROJ_ID, ACT_GROUP_CODE, ACT_CODE_1, QTY_1)
values (5050, 5015, 30486, 'B39368', 'TEST', '0101010101010101', 1709)
1 row(s) inserted
Instead using the Screen, at runtime, I receive the message:
FRM-40400 Transation Complete: 1 records applied and saved
but nothing is saved in the table SP_BOQ_BOM_POS_ACTIVITIES, and the view SPV_BOQ_BOM_POS_ACTIVITIES contain the calculated QTY_1 for the 'key', with null value.
Moreover If in the field QTY_1 (NUMBER) I put a character, instead a Number, just to see if the Screen attempts or not an UPDATE or AN INSERT, the message is FRM-40509: Oracle Error. UNABLE TO UPDATE RECORD. Why happen an Update and not an INSERT using the Screen?
In effect, the trial using SQL navigator of the following statement
insert into SPV_BOQ_BOM_POS_ACTIVITIES
(BOQ_HEADER_ID, BB_ID, BOQ_ID, PROJ_ID, ACT_GROUP_CODE, ACT_CODE_1, QTY_1)
values (5050, 5015, 30486, 'B39368', 'TEST', '0101010101010101', 'r');
I got Invalid Number and it's ok as answer from the database.
Edited by: fmariani on 30-apr-2009 1.51

Complex view update

Dear All
Pls guide me how to update a complex View
Thanks for reading this post
*009*

Hi again,
You probably need to write an [Instead-of-Trigger|http://download.oracle.com/docs/cd/B12037_01/server.101/b10759/statements_7004.htm#i2064426]
Regards
Peter

Complex view in forms 6i

i have create a complex view
and i want to use this view in oracle form developer 6i
when i try to insert a new record in the view i have this error message frm-40602
in the database i have wire the instead of trigger
so how can i use the form to insert anew record in this view

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I created a form against a view. The view is complex enough which prevents direct updates. To incorporate the update logic I created an 'instead of update' trigger on the view. When I open up the form, do changes, and click 'Apply Changes' button I am getting the following exception
ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc.
I understand that the standard 'Automatic Row Processing' process is trying to lock the record before updating using a cursor like
select *
from my_view
for update
and fails. Is it possible to bypass this locking while using the standard APEX processes?
I think I can create a custom PL/SQL process which would execute the UPDATE statement (at least, it works in SQL*Plus), but I would like to know if I can use a standard ApEx functionality for this.

Hello,
Sorry for delay.
I had found a feedback about trigger issue when restore SQL Database from a BACPAC file. Microsoft said the fixed will be available in the next major release of DacFx.
Feedback:
SQL Azure fires a trigger when restoring from bacpac
You can refer to the workarounds in the feedback. For example, if there is small amount of triggers on the database, you can try to remove the triggers and then recreate when restore from bacpac file.
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Fanny Liu
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Why we cannot perform DML operations against complex views directly.

hi
can any tell me why we cannot perform DML operations against complex views directly.

Hi,
It is not easy to perform DML operations on complex views which involve more than one table as said by vissu. The reason being you may not know which columns to be updated/inserted/deleted on the base tables of the views. If it is a simple view containing a single table it is as simple as performing actions on the table.
For further details visit this
http://www.orafaq.com/wiki/View
cheers
VT

Regarding Complex View

I have a complex view in which all not null columns selected in view query for the both table,
No group function,pseudo column,distinct,group by clause,no columns defeined by expression,
Whether we can do DML operation for this above criteia?

From the document
Updates of Object Views
You can update, insert, and delete the data in an object view using the same SQL DML you use for object tables. Oracle updates the base tables of the object view if there is no ambiguity.
A view is not updatable if its view query contains joins, set operators, aggregate functions, GROUP BY, or DISTINCT. If a view query contains pseudocolumns or expressions, the corresponding view columns are not updatable. Object views often involve joins.
To overcome these obstacles Oracle provides INSTEAD OF triggers. They are called INSTEAD OF triggers because Oracle runs the trigger body instead of the actual DML statement.
INSTEAD OF triggers provide a transparent way to update object views or relational views. You write the same SQL DML (INSERT, DELETE, and UPDATE) statements as for an object table. Oracle invokes the appropriate trigger instead of the SQL statement, and the actions specified in the trigger body take place.

FRM-40602: Cannot insert into or update data in a view

Hi all!
I have a form based on a view and I want to get rid off this message.
I set the properties blocks query only but it still doesn't work.
Does someone met with this situation?
Many thanks!

Hello
I've just been messing about with a similar problem. Basically, I have a view that involves a join across two tables, I have a data block in my form that's based on the view, and I've written an INSTEAD OF trigger to insert/update/delete from the two tables.
I was getting the error message 'Cannot insert or update data in a view', and it turned out that the error was happening because the join column between the two tables was the primary key on one of the tables, but the corresponding column on the join table had no unique key on it. This meant that Oracle couldn't establish a one-to-one relationship between rows in the view and rows in the underlying tables. The column on the join table was in fact unique on that table, and adding a unique constraint on that column in the database cured the problem.
Hope that's of use.
regards
Andrew
UK

Update data from a view

Hi,
trying to update data from a view with:
- Company (table)
- Products (table)
In a form, the user wants to update
e.g: both products.product_name and Company.company_name.
Is there a way to update a view records built on 2 tables ?
Any idea will be really appreciated
Thks

An other question on INSTEAD OF Trigger:
Base Tables:
1.
SQL> desc pcs_companies;
Name Null? Type
COMPANY_ID NOT NULL NUMBER(12)
COUNTRY VARCHAR2(350)
COMPANY_NAME VARCHAR2(320)
COMPANY_PHONE VARCHAR2 (320)
COMPANY_FAX VARCHAR2(320)
COMPANY_URL VARCHAR2(150)
UPDATED_DATE DATE
2.
SQL> desc pcs_individuals;
Name Null? Type
INDIVIDUAL_ID NOT NULL NUMBER(12)
COMPANY_ID NUMBER(12)
FIRST_NAME VARCHAR2(320)
LAST_NAME VARCHAR2(320)
LOB VARCHAR2(300)
JOB_ROLE VARCHAR2(300)
TITLE VARCHAR2(300)
GENDER VARCHAR2(3)
EMAIL VARCHAR2(720)
FAX VARCHAR2(720)
PHONE_NO VARCHAR2(720)
UPDATED_DATE DATE
COUNTRY VARCHAR2(150)
ADDRESS_1 VARCHAR2(720)
ADDRESS_2 VARCHAR2(720)
ADDRESS_3 VARCHAR2(720)
CITY VARCHAR2(720)
3. pcs_individuals.COMPANY_ID = FK, ref pcs_companies.
4.
SQL> CREATE VIEW V_PCS_COMPANY_IND
AS
SELECT
   i.INDIVIDUAL_ID,
   c.company_id,
   c.country,
   c.Company_name,
   c.company_phone,
   i.Company_id indiv_company_id,
   i.gender,
   i.first_name,
   i.last_name,
   i.lob,
   i.job_role,
   i.title,
   i.email_address,
   i.fax,
   i.phone_no ,
   i.address_1,
   i.address_2,
   i.address_3,
   i.city
FROM
  pcs_individuals i,
  pcs_companies c
WHERE
  i.company_id = c.company_id
5.
CREATE OR REPLACE TRIGGER PCS_ADMIN.PCS_COMP_IND_UPDATE_TR
INSTEAD OF UPDATE ON PCMS_ADMIN.V_PCS_COMPANY_IND
FOR EACH ROW
begin
update PCS_COMPANIES
set
     Company_name = nvl(:new.company_name,company_name),
     company_phone = nvl(:new.company_phone,company_phone)
where company_id = :new.company_id;
update PCS_INDIVIDUALS
set
     gender = nvl(:new.gender,gender),
first_name = nvl(:new.first_name,first_name),
     last_name = nvl(:new.last_name,last_name),
     lob = nvl(:new.lob,lob),
     title = nvl(:new.title,title),
     email_address = nvl(:new.email_address,email_address),
phone_no = nvl(:new.phone_no,phone_no),
     fax = nvl(:new.fax,fax),
     country = nvl(:new.country,country),
     address_1 = nvl(:new.address_1,address_1),
     address_2 = nvl(:new.address_2,address_2),
     address_3 = nvl(:new.address_3,address_3),
     city = nvl(:new.city,city)
where company_id = :new.company_id;
end PCMS_COMP_IND_UPDATE_TR;
6.
CREATE OR REPLACE TRIGGER PCS_ADMIN.NEW_COMPANY_ID_INSERT
INSTEAD OF INSERT ON PCS_ADMIN.V_PCS_COMPANY_IND
DECLARE
ID number;
BEGIN
INSERT INTO pcs_companies (org_id)
select v_pcs_comp_id_seq.nextval
into ID
from dual;
:new.company_id = ID;
INSERT INTO pcs_individuals (company_id)
select v_pcs_comp_id_seq.nextval
into ID
from dual;
:new.company_id = ID;
end;
My question
On point 6:
Assumption:
- Company_id is PK of pcs.Company and FK in pcs.individuals
- It should be feed by sequence (v_pcs_comp_id_seq)
Now how can i insert the same value for company_id (current.v_pcs_comp_id_seq) in both pcs_companies and pcs_individuals ? I've tested it in the above INSTEAD OF Trigger.It failed.
Thks for any advice,
lamine

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is not possible to write a before update or insert trigger based on a view?
create or replace trigger trg_bef_upd_vwangajatiabsente
before update on vw_angajati_absente
referencing old as old new as new
for each row
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Roger22 wrote:
regarding to 2)
in my trigger i must raise_application_error? if i don't raise then i need to issue update statements..... ?If you have an INSTEAD OF trigger that just has a body similar to the body you posted above, that would mean that update statements either
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Updates to a complex view

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