Create/Modify another form's triggers

How can we create modify an existing form trigger from another form? Eg, in FORM A, I want to create a PRE-BLOCK trigger on a certain block in FORM B before calling FORM B. Any advice is appreciated. Thanks.

I want to control the firing of the trigger, ie, want it to fire only if FORM B is opened from FORM A.
If this cannot be done, can we pass parameters into the trigger in FORM B and then do the checking using the input parameter?
I guess another way is to use a flag in a user-defined table?

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Hi
In Apex 3, I created a tabular form based on the query below:
select user_id /* PK */, name, dob
from users
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Then I changed the query to:
select user_id /* PK */, name, null dob
from users
...(i.e. not interested in the dob column anymore but want to keep the report column) and cleared the properties reference table owner/name/column name of the dob report column.
However, when I try to update the name of a user, I get the error:
Error in mru internal routine: ORA-20001: Error in MRU: row= 1,
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current checksum = "7C3CD9C5DA0B5AF45AE616959020A0AA",
item checksum = "6910D5C7015D84773A9E8F65299991F6".,
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How to call another form ,if option is entered in a text item object ???

hi ,
I am created an application ,where in i press a button which call another form having a menu .
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VAR VARCHAR2-------;
begin
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when---------
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In a nutshell: I’d like to know how to hide (or show) elements in a poplist, depending on the value of another column on the FORM.
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1)     ISNONSYN…can have values ‘Y’ or ‘N’
2)     ISIDSERTAIN…has a poplist (set of static values) with values ‘Y’, ‘N’, or ‘-‘
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Mark, thanks again for persisting.
I think we're very, very close...but just not quite there.
In your 2rd sentence, you state:
"Question: At this point, which element does ISIDCERTAIN show as selected?
Answer: I think it is (or might be) '-' "
This is not correct. At no point do I select the '-' from the poplist. It is the 'Y' that is on the form when the 'NNN deleting now' message comes up
Nonetheless, I included the statement as you suggested.
I included the :
:flsp7.isidcertain := null;
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The result was still a:
FRM-41331 Could not delete element from ISIDCERTAIN
Mark, I found this on metalink...could this have something to do with it? I am INSERTING a new row when I choose the poplist values:
Subject:      FRM-41337 When Populating List with Record Group
     Doc ID:      Note:2075384.6     Type:      PROBLEM
     Last Revision Date:      20-OCT-2005     Status:      PUBLISHED
Problem:
FRM-41337 WHEN POPULATING LIST WITH RECORD GROUP DURING RUNTIME
The code compiles fine. Getting the error intermittently.
Solution:
Trying to change a poplist's values based on a record group while the block status is set to
CHANGED or QUERY. This can be only when the status is NEW. If forms is in QUERY
OR CHANGED mode it needs to display some info. Changing the list elements could cause
problems with displaying the info that is already there. So, it cannot be done.
To get around this problem, ensure that block status is NEW mode when updating the List.
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And Mark....as well as raising this issue here on OTN, I also raised it in METALINK. Someone over there has suggested a different approach - using RECORD GROUPS :
https://metalink.oracle.com/metalink/plsql/f?p=200:27:5275918850865978815::::p27_id,p27_show_header,p27_show_help:702091.994,1,1
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Hi,
I have multiple detail table for a master table. The master table is project table and the details tables are all related to the project table. In the portal forms we cannot have a form based on multiple child tables. So I am trying to enter one detail table at a time. I have created a master-detail table based on project table and a detail table (cost table). After I enter data in this MD form I want to carry the projectid to another form based on another detail table (resource table) on the next page. I want to navigate to this next form by clicking on a next button after I have entered data on the previous MD form.
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Hi,
I have multiple detail table for a master table. The master table is project table and the details tables are all related to the project table. In the portal forms we cannot have a form based on multiple child tables. So I am trying to enter one detail table at a time. I have created a master-detail table based on project table and a detail table (cost table). After I enter data in this MD form I want to carry the projectid to another form based on another detail table (resource table) on the next page. I want to navigate to this next form by clicking on a next button after I have entered data on the previous MD form.
The projectid is a hidden field in the first MD form and is generated by a database sequence. I understood that there is many ways to send field values to a form:-
1. By creating a moduleid link on the next button. This link will have the projectid value
2. By calling the form from a PL/SQL procedure on the CALL/GO of the first MD form.
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Is the above way of entering multiple detail tables feasable ? Please advice.

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