Before and after triggers
just can somebody clarify
when we say
create or replace trigger tn before/after insert/update/delete for each row/statement
i just want to know what i can do with a before trigger which i cannot do with a after trigger and viceversa
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by sushant prabhu:
i just want to know what i can do with a before trigger which i cannot do with a after trigger and viceversa<HR></BLOCKQUOTE>
Before row triggers can modify column values (:new.column := value) before the row is originally written to disk. I don't think after row triggers can modify :new values. Before row triggers can't see the row's rowid, at least not for inserts, but after row triggers always can.
Statement triggers can modify the triggering table, but row triggers can't. Statement triggers can't tell what rows are touched, but row triggers are called once per row touched and can see :old and :new values for that row.
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Triggers before and after update
Hi
I would like to add triggers before and after update for the following code. I would be thankful if someone give some guidance
update per_all_people_f a
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from per_all_people_f a1
where a1.person_id = a.person_id)
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annaHi
I was unable to answer you. I agree with Peter . Also i want to add
that in HRMS you should check what triggers are already on that table and be carefull with creating your own one. With your own trigger you can influence on some application logic you know.
( And i hope that is a table first of all :) - but as i know _F at the end of table name means table )
T -
Hi,
I have a doubt on functioning of Before or After Triggers.
Here is an example of it:
I created a trigger on EMP table
create or replace trigger tri11 before insert or update or delete on emp for each row
begin
if to_char(sysdate,'dy')='fri' then
raise_application_error(-20101,'No Transactions should be happend on Friday');
end if;
end;
According to the trigger created it has to fire before any event is happening and it should not allow any insertions or updates or deletion on FRIDAY.
And that is working fine.
I changed the trigger to fire on After Insert or update or delete....
create or replace trigger tri11 after insert or update or delete on emp for each row
begin
if to_char(sysdate,'dy')='fri' then
raise_application_error(-20101,'No Transactions should be happend on Friday');
end if;
end;
Here according to this trigger it has to fire after any event is happening .....but still it is not allowing me to perform any insertions or updates or deletion on FRIDAY.
And showing me the error message as below:
SQL> update emp set sal = 11000;
update emp set sal = 11000
ERROR at line 1:
ORA-20101: No Transactions should be happend on Friday
ORA-06512: at "SCOTT.TRI11", line 3
ORA-04088: error during execution of trigger 'SCOTT.TRI11'
Can anyone please explain me the difference.
Thanks.All triggers must be fired synchronously with the triggering statement. The statement and all triggers that are fired as the result of the statement must be atomic-- they must all succeed or all fail. It doesn't matter whether it is a before or after statement trigger that throws the exception-- in either case, the entire statement will fail and thus be rolled back.
Justin -
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Hi there.
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Have fun -
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acorn
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Jim -
Data Loading(Before and After Image)
I heard that a datasource which has both "Before and After Image " ,then the data can be sent directly to the infocube or from the DSO to the Infocube but where as
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A ALE Update Pointer (Master Data)
ABR Complete Delta with Deletion Flag Via Delta Queue(Cube-Comp)
ABR1 Like Method 'ABR' But Serialization Only by Requests
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ADDD Like 'ADD' But Via Delta Queue (Cube-Compatible)
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AIM After-Images Via Delta Queue (e.g. FI-AP/AR)
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O
ODS ODS Extraction
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What is the reason to repair permissions before and after updating software? This may sound like a stupid question to many of you, but I am new to computers and I am trying to learn how and why of some of the things of my PowerBook. I installed some updates without repairing permissions. Did I install some software updates the wrong way? Thank you.
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I have a number questions that I want to know the average of all the before and after data to compare them, how do I set this up in a form in FormsCentral? Here is an example of what I want to do - the green bar is "before" and blue is "after"
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Date - before and after precision?
Hi all,
I have two date objects and I am using the before and after methods for a decision process. I would like to know the precision of the above methods. Is the prevision at the seconds, milliseconds, or nanoseconds level?
Any help is appreciated.
Thanks
SaravananWhat does this have to do with JDBC?
java.util.Date uses milliseconds.
java.sql.Data uses nanoseconds (which isn't going to matter unless something actually sets those.) -
Compare BEFORE and AFTER image in replicat
Do any of You experts know how to make the following code smaller?
...,p_kolonner=@STRCAT("ID='",@IF(@COLTEST(BEFORE.ID,PRESENT),BEFORE.ID,""),"'>'",@IF(@COLTEST(ID,PRESENT),ID,""),"'¤",
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"SMRT_ID='",@IF(@COLTEST(BEFORE...The actual parameter would look like:
P_KOLONNER: ID=''>'11531'¤OBSOLETED_ON=''>''¤SMRT_ID=''>'1'¤SM_SMID=''>'2011X0074-00'¤SMT_ID=''>''...
This code is part of the params section of a sqlexec in a replicat file where I want to concatenate before and after images of a table into one parameter. I have to replace all NULLs with '' or the whole string evaluates to NULL when one of the columns are NULL. I have a procedure receiving the parameter.
How do I write this code shorter? I have to use less code to accomplish the same thing.Hi Yosemite:
You're right, the correct term is "Key Fields", in the previous post I made a mistake when referring to it as "Key Part", I'm sorry for the confusion.
Anyway, it is not clear to me if you managed to solve the problem or if you're still struggling with your data loads, if this is the case, Could you please elaborate?
-Which is the data source you are working with?
-Did you map the ROCANCEL field both to the 0STORNO and 0RECORDMODE InfoObjects?
-Are you using Addition or Overwrite on the Update Rules/Transformation Rules to the DSO?
-Have you applied any relevant SAP Note to fix this issue?
In case you have not read the blog by Swapna Gollakota, take a look at it, you might find it useful.
How does a datasource communicates "DELTA" with BW?
/people/swapna.gollakota/blog/2007/12/27/how-does-a-datasource-communicates-delta-with-bw
Regards,
Francisco Milán.
Edited by: Francisco Milan on Oct 29, 2010 12:31 PM
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