Trigger on a view on a linked db

I have an access db that i have 'hooked' into with a database link inside of Oracle. I then have an oracle view based on that linked database so i can see the records that are over in access. This all works well. What i would like to do now is create a trigger that fires each time a new record is added over in access.
I cannot create that trigger on the database link because it is DDL and that is prohibited.
I cannot create an After Insert trigger on my oracle view because that is prohibited on views.
I can create an Instead Of trigger on the view but it never fires because the insert takes place in access not in oracle.
Is there any way for Oracle to 'detect' when a new record has been added in the Access database?

Feel like I'm getting really close to figuring this out. I created an mv on the db link like so:
DROP MATERIALIZED VIEW mv_Test_SYSDATE
CREATE MATERIALIZED VIEW mv_Test_SYSDATE
TABLESPACE users
REFRESH COMPLETE
START WITH SYSDATE
NEXT SYSDATE + 0.002 AS
SELECT acctnum, name, odometer, lastdate, cardnumber
from card@myaccessdb
If i go into the access db and insert a new record I can see the record count in the mv change after a few minutes (i'm guessing 2.8 minutes).
Which makes me happy. The problem now is that when i set up my trigger like so:
CREATE OR REPLACE TRIGGER "AZ"."TEST_MV_TRIGGER"
AFTER INSERT ON AZ.MV_TEST_SYSDATE
FOR EACH ROW
BEGIN
INSERT INTO TEST ("ACCTNUM","NAME","ODOMETER","LASTDATE","CARDNUMBER")
VALUES (:new.acctnum,:new.name,:new.odometer,:new.lastdate,:new.cardnumber);
END;
It actually does fire off of the mv which is a positive. But when i look in table test i see that it has pumped every record over, instead of just the newly added one from the access db.
I can understand why because i suppose the mv refresh is for the entire table. but I'm not at where I want to be because I want to capture the delta on the access table.
Any ideas?

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Trigger on a view

Hi,
using Oracle 9i + wli 8.1 sp2 + RDBMS adapter.
can i set the trigger on a view and not on a table ?
This way I can define a subset of the table to be checked if it changed and not
the whole table.
(i tried it with no success)
Yuval

Feel like I'm getting really close to figuring this out. I created an mv on the db link like so:
DROP MATERIALIZED VIEW mv_Test_SYSDATE
CREATE MATERIALIZED VIEW mv_Test_SYSDATE
TABLESPACE users
REFRESH COMPLETE
START WITH SYSDATE
NEXT SYSDATE + 0.002 AS
SELECT acctnum, name, odometer, lastdate, cardnumber
from card@myaccessdb
If i go into the access db and insert a new record I can see the record count in the mv change after a few minutes (i'm guessing 2.8 minutes).
Which makes me happy. The problem now is that when i set up my trigger like so:
CREATE OR REPLACE TRIGGER "AZ"."TEST_MV_TRIGGER"
AFTER INSERT ON AZ.MV_TEST_SYSDATE
FOR EACH ROW
BEGIN
INSERT INTO TEST ("ACCTNUM","NAME","ODOMETER","LASTDATE","CARDNUMBER")
VALUES (:new.acctnum,:new.name,:new.odometer,:new.lastdate,:new.cardnumber);
END;
It actually does fire off of the mv which is a positive. But when i look in table test i see that it has pumped every record over, instead of just the newly added one from the access db.
I can understand why because i suppose the mv refresh is for the entire table. but I'm not at where I want to be because I want to capture the delta on the access table.
Any ideas?

How to add trigger on materialized view?

Hi, I'm trying to add trigger on materialized view. I don't know how to do it. I'm new to oracle and PL/SQL. Can you guys put some working example please? Thank you for every advise.

Please check the below link. This answers you query:
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Trigger of a view

Good morning,
Does a trigger of a view start like a trigger of a table ?
I mean, a view searches its data in a table of a linked DB. If a row is added in the table, will the trigger of the view run ?
Thank you very much.
Patrick

If a row is added in the table, will the trigger of the view run ?Triggers on views are INSTEAD OF and are specified for views as objects - NOT the tables you include in your selection in views. Because of this only DML applied to views (not tables) fire "instead of" triggers:
SQL> create table t (id number);
Table created.
SQL> create view t_v as select * from t;
View created.
SQL> create trigger tab_t
2 before insert on t
3 begin
4 dbms_output.put_line('Table trigger');
5 end;
6 /
Trigger created.
SQL> create trigger view_tr
2 instead of insert on t_v
3 begin
4 dbms_output.put_line('View trigger');
5 end;
6 /
Trigger created.
SQL> insert into t values(1);
Table trigger
1 row created.
SQL> insert into t_v values(2);
View trigger
1 row created.Rgds.

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You can try these free programs to scan for malware, which work with your existing antivirus software:
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Using a view as left link

Hi All
I want to develop a left link which will appear in every view of the application and will have the links by clicking which right view can be changed like our e-mail sites where we click on folder name and right part gets changed.
For this functionality I have created a view for left link and added it to a view set so that i don't need to add all those links to each and every view again and again but i have a problem like when i click on the link how to change the lift link from one view to another.
e.g.
i have links called inbox and spam in left link and currently showing inbox in right view now when i click on spam automatically right view should be get changed to spam folder.
how can i achieve this functionality. Is it possible through view set or if any other way to implement this?
Thanks in advance
Prasanna

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Like
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Issue with instead of trigger on a view

Gurus,
I have an issue with an instead of trigger on a view. The trigger is listed below. The insert and update seem to be working fine but the delete section is not.
From the application, we have a screen on which we attach images. We trigger of an insert and update when we attach images. We are using hibernate as our object relational mapping tool.
We have added some logging into the delete section but that portion of the trigger does not seem to be executing at all.
Please advise.
Thanks
Hari
CREATE OR REPLACE TRIGGER trg_vw_result_image_uid
INSTEAD OF
INSERT OR DELETE OR UPDATE
ON vw_result_image
REFERENCING NEW AS NEW OLD AS OLD
DECLARE
v_cnt number(38);
v_cnt_old number(38);
v_err_msg VARCHAR2 (250);
BEGIN
-- v_rslt_id number(38);
-- v_cnt number(38);
select count(1) into v_cnt from result_image_master
where RSLT_IMAGE_ID = :new.RSLT_IMAGE_ID;
--select count(1) into v_cnt from result_image_master
-- where ACC_BLKBR_ID = :new.ACC_BLKBR_ID
-- and upper(RSLT_IMAGE_NM) = upper(:new.RSLT_IMAGE_NM);
select count(1) into v_cnt_old from result_image_master
where RSLT_IMAGE_ID = :old.RSLT_IMAGE_ID;
insert into t2( TEXT_VAL, DT1, seq1)
values (' before v_cnt', sysdate, t6.NEXTVAL);
--if v_cnt = 0
--****INSERTING
IF INSERTING
THEN
insert into t2( TEXT_VAL, DT1, seq1)
values (' v_cnt is 0 and inserting into result_image_master', sysdate, t6.NEXTVAL);
insert into t2( TEXT_VAL, DT1, seq1)
values (' inserted bb id :'||:new.ACC_BLKBR_ID, sysdate, t6.NEXTVAL);
insert into result_image_master (
RSLT_IMAGE_ID
,RSLT_IMAGE_HBR_VER
,RSLT_IMAGE_TYPE_ID
,RSLT_IMAGE_NM
,RSLT_IMAGE_LABEL
,RSLT_IMAGE_SEQ
,RSLT_SHOW_ON_RPT
,RSLT_SLIDE_NO
,RSLT_CELL_NO
,RSLT_X_COORD
,RSLT_Y_COORD
,ACC_BLKBR_ID
,CREATED_BY
,DATE_CREATED
,MODIFIED_BY
,DATE_MODIFIED
values (
:new.RSLT_IMAGE_ID
,:new.RSLT_IMAGE_HBR_VER
,:new.RSLT_IMAGE_TYPE_ID
,:new.RSLT_IMAGE_NM
,:new.RSLT_IMAGE_LABEL
,:new.RSLT_IMAGE_SEQ
,:new.RSLT_SHOW_ON_RPT
,:new.RSLT_SLIDE_NO
,:new.RSLT_CELL_NO
,:new.RSLT_X_COORD
,:new.RSLT_Y_COORD
,:new.ACC_BLKBR_ID
,:new.CREATED_BY
,:new.DATE_CREATED
,:new.MODIFIED_BY
,:new.DATE_MODIFIED
insert into result_image_blob (
RSLT_IMAGE_ID
,rslt_image_blob
values (
:new.RSLT_IMAGE_ID
,:new.rslt_image_blob
--****UPDATING
ELSIF UPDATING
-- v_cnt > 0 --
THEN
insert into t2( TEXT_VAL, DT1, seq1)
values (' updating result_image_master', sysdate, t6.nextval);
insert into t2( TEXT_VAL, DT1, seq1)
values (' updating bb id :'||:new.ACC_BLKBR_ID, sysdate, t6.nextval);
update result_image_master
set RSLT_IMAGE_HBR_VER = RSLT_IMAGE_HBR_VER + 1
,RSLT_IMAGE_TYPE_ID = :new.RSLT_IMAGE_TYPE_ID
,RSLT_IMAGE_NM = :new.RSLT_IMAGE_NM
,RSLT_IMAGE_LABEL = :new.RSLT_IMAGE_LABEL
,RSLT_IMAGE_SEQ = :new.RSLT_IMAGE_SEQ
,RSLT_SHOW_ON_RPT = :new.RSLT_SHOW_ON_RPT
,RSLT_SLIDE_NO = :new.RSLT_SLIDE_NO
,RSLT_CELL_NO = :new.RSLT_CELL_NO
,RSLT_X_COORD = :new.RSLT_X_COORD
,RSLT_Y_COORD = :new.RSLT_Y_COORD
,ACC_BLKBR_ID = :new.ACC_BLKBR_ID
,MODIFIED_BY = :new.MODIFIED_BY
,DATE_MODIFIED = :new.DATE_MODIFIED
where RSLT_IMAGE_ID = :new.RSLT_IMAGE_ID;
update result_image_blob
set rslt_image_blob = :new.rslt_image_blob
where RSLT_IMAGE_ID = :new.RSLT_IMAGE_ID;
END IF;
IF DELETING OR v_cnt_old > 0
THEN
insert into t2( TEXT_VAL, DT1, seq1) values (' deleting rows ...', sysdate, t6.NEXTVAL);
DELETE from result_image_blob where RSLT_IMAGE_ID = :old.RSLT_IMAGE_ID;
insert into t2( TEXT_VAL, DT1, seq1) values ('deleting result_image_blob : '||:old.RSLT_IMAGE_ID , sysdate, t6.NEXTVAL);
DELETE from result_image_master where RSLT_IMAGE_ID = :old.RSLT_IMAGE_ID;
insert into t2( TEXT_VAL, DT1, seq1) values ('deleting result_image_master : '||:old.RSLT_IMAGE_ID , sysdate, t6.NEXTVAL);
END IF;
EXCEPTION
WHEN OTHERS THEN
v_err_msg := SQLERRM;
insert into t2( TEXT_VAL, DT1, seq1) values (v_err_msg, sysdate, t6.nextval);
END;
Edited by: bhanujh on Sep 13, 2010 7:55 AM

bhanujh wrote:
The error msg that we are getting is
09/08/2010 4:02:09 PM: Unable to save the results :: Could not execute JDBC batch updateSorry, we don't recognize this message as any valid Oracle error.
:p

"instead of" trigger on a view with a condition

I'm trying to create an instead-of trigger on a view but I want it all such that:
1. It fires only for a certain condition.
2. When the condition isn't met, I want the normal DML on the view to continue as it normally would.
3. I want to avoid writing as much manual DML code as possible for long-term maintainability.
My first attempt is like this:
create or replace trigger PROPOSAL_PARTS_V_IRU
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When compiling that I get "ORA-25004: WHEN clause is not allowed in INSTEAD OF triggers".
OK I will accept that even though I want it to work.
So my next attempt could be:
create or replace trigger PROPOSAL_PARTS_V_IRU
instead of update on proposal_parts_v
for each row
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create or replace trigger PROPOSAL_PARTS_V_IRU
instead of update on proposal_parts_v
for each row
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END;...where "update_row" is some sort of built-in command that tells oracle to continue with the current update as if the trigger never existed.
Back in the day I seem to remember that Oracle Forms had a trigger and syntax like this where you could intercept a DML and if under certain conditions it wasn't true, you could say "update_row" (or maybe it was "update_record?...whatever) and it meant "continue with update as if this instead-of trigger never existed".
Is anything available like that for the DB now? I know in older versions no, but we are now on 11g...anything new come out like this?
Otherwise I have to manually write an update statement and I'd rather not if I don't need to.
Thanks!

riedelme wrote:
gti_matt wrote:
I'm trying to create an instead-of trigger on a view but I want it all such that:
1. It fires only for a certain condition.You can use IF Logic inside a trigger to do or not do anything. As long as it is a condition you can check you can code IF logic around it
2. When the condition isn't met, I want the normal DML on the view to continue as it normally would.You will have to code all of your logic in the INSTEAD of trigger. The whole purpose of the INSTEAD OF trigger is to execute INSTEAD OF performing DML on the view. There is no way to go back to the "normal DML" when the INSTEAD OF trigger exists.
You can put all of the logic you will need in the INSTEAD OF trigger and use IF conditions. Use IF logic to code both your special and "normal" processing.
3. I want to avoid writing as much manual DML code as possible for long-term maintainability.You will have to code the operative lines somewhere. Reusable functions and/or procedures in a package?Yep using an "IF" I knew about...no problem there.
But was just looking for a cheap and easy way to say (for the "else" condition) to revert to normal DML processing. Sounds like in a DB trigger there is no such syntax I guess.
This is an example from Oracle Forms, I was looking for a database equivalent of this(see http://sqltech.cl/doc/dev2000/help/fbhelp18.htm):
Built-in Subprograms for On-Event Triggers For most of the transactional On-event triggers, there is a corresponding built-in subprogram.
On-Event Trigger
Corresponding Built-in
On-Delete
DELETE_RECORD
On-Insert
INSERT_RECORD
On-Update
UPDATE_RECORD
When you call one of these built-in subprograms from its corresponding transactional trigger, Form Builder performs the default processing that it would have done normally at that point in the transaction.
For example, if you call the INSERT_RECORD procedure from an On-Insert trigger, Form Builder performs the default processing for inserting a record in the database during a commit operation.
When these built-ins are issued from within their corresponding transactional triggers, they are known as do-the-right-thing built-ins. That is, they do what Form Builder would normally have done at that point if no trigger had been present. Thus, an On-Insert trigger that calls the INSERT_RECORD procedure is functionally equivalent to not having an On-Insert trigger at all. Such a trigger is explicitly telling Form Builder to do what it would have done by default anyway.Note that the author calls them the "do-the-right-thing" built-ins. That's what I was looking for but on the DB side. Sounds like Oracle didn't come up with that (yet)?

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like that ;
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go
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I have 3 databases with identical table structure installed in 3 different servers.(East ,West & South) To view consumers bill information
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Hello all,
I am trying to create a trigger on a view that is used to update a few columns in the base table. Since I am new to trigger, an example will be appreciated.
Thanks in advance.

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Trigger on a view on a linked db

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