How to Create a Custom Integrator in R12 based on a Query set

Question

Hi Everyone,
I am very much new to web adi. I got an unique requirement which I am finding it difficult. I did searched through the entire documentation/blogs/forums and I didnt find any suitable answer. Please let me know if anybody can throw some pointers here.
My Requirement is as follows
1) Using WEB ADI I need to update the data to collections responsibility ( I need to update unpaid reason code column and notes column for transactions)
2) So to start up with I need to design my excel template first with a query region to download the data. This query region may have 5-6 parameters like transaction number, customer name, customer number. When I click the submit button in query region, The data should be retrieved from database and should display in the same excel sheet.
3) Now for the data fetched from database, I need to update some of the columns and then again upload it back to EBS. I need to enable some of the columns to be LOV's.
Now My Questions are
1) Is this building a parameter based query then downloading to excel and then after modifying uploading back to EBS. Is this possible with WEB ADI. If this is doable then please let me know.
2) Unfortunately there are no interface tables or public API's available for collections responsibility then how one can update the data
Also
I was trying to create a custom integrator a basic one to insert the data to a custom table. I had used HR Integrator set up for creating custom integrator.Enabled all the profile options functions and menus. But now I am stuck at a point I am unable to create a layout whenever I choose my custom integrator and then tries to create a layout I get the following error:
No columns have been defined in the column list.
Once this can be resovled then I can fo for column mapping and then test a custom load. Can anybody please let me know what am I missing here after following each procedures.
Your inputs are appreciated. I am in great need of your suggestions pretty urgently
Thanks and Regards
Keshava

Answer 1

Hi,
The answer to your query is 'Yes'. You need to design a 'UPDATE' metadata type custom integrator. The custom integrator shall use a parameter based view to first download data and then use a PL/SQL wrapper/API to re-upload it back. The brief steps are listed below:
1. Create a 'UPDATE' metadata type custom integrator. Give a parameter list name, std/custom view for data download and a PL/SQL wrapper.
2. Create a form function and associate the form function with the custom integrator created.
3. Add the form function to the std WebADI menu for access.
4. Define a layout for the custom integrator defined.
4. To create a parameter use the standard integrator 'HR Standalone Query'. As a part of this integrator you can define the SQL WHERE clause (parameter based) that you will like to use with the custom/std view defined in the custom integrator definition.
Note: You can use a max of 5 parameters only. For each parameter, one needs to define the datatype and also the HR standalone query has a size limitation of 2000 chars in 11i10. You increase this length you may apply patch - 3494588 to get 4000 chars.
Hope this information helps.
Thanks,
Nitin jain