Form Code Execution

Question

Hi,
Is it possible that we can execute the Oracle Form code on the fly, like PL/SQL Code using the Execute Immediate.
Scenario
Declare
lv_block_name Varchar2(100);
lv_item_name Varchar2(100)
Begin
lv_block_name := :System.current_block;
IF lv_block_name = 'XYZ' Then
lv_item_name := :system.current_item;
end;
I have store this sample code in the database, and I goona pass this code to the Oracle Form library and want it execute in the Library..... Any solution or idea...
Thanks,
Edited by: Mohsin on Feb 22, 2011 1:18 PM

Answer 1

There is no such thing like "Dynamic Forms PL/SQL" or whatever you want to call it. Dynamic SQL is executed on the Database Server, and thus the Forms Builtins cannot be executed as the Database doesn't understand them.
However; even if you just want to store Database PL/SQL in Tables I wouldn't dare to go down that road.
First of all it's a nightmare to maintain as a recompile of your forms won't fail when you change your objects which would brake your code but as it's all dynamic nobody can tell. Also have fun debugging your dynamic routines when you search for bugs (yes, you will have bugs, no one writes error free code). Second is that it's a unnecessary overhead (retrieve the logic from the database, parse it and execute it again) leaving alone that you most certainly will trash the Shared Pool of the database. Your solution will seriously suffer from performance and will never scale, that's for sure. And of course you will have a serious security issue. The day someone get's access to your table where your code is stored is the day your database will start to behave abnormal and you most certainly will loose data.
So don't think about implementing such a silly approach no matter how cool you think it is: it's not. It's a nightmare and a risk from every single point of view.
Storing PL/SQL in the database is already invented: it's called stored procedures. Storing somewhat generic Forms PL/SQL is also already invented: it's called Library. Don't try to reinvent things which already exist as your solution most certainly won't work as good as the one already provided by oracle.
cheers