Set value for textarea field in tabular report

Question

Hi all,
I need some help setting textarea values in a tabular report. The tabular report is for users to be able to build their own ad hoc report, by specifying which columns should be included and filtered. Here are the example tables:
-- Table that holds all of the data for the report.
create table vehicle (
  make varchar2(50),
  model varchar2(50),
  type varchar2(50),
  year number);
insert into vehicle values ('Toyota','Camry','Sedan','2008');
insert into vehicle values ('Toyota','4Runner','SUV','2008');
insert into vehicle values ('Honda','Civic','Compact','2011');
insert into vehicle values ('Honda','Accord','Sedan','2010');
insert into vehicle values ('Ford','F150','Truck','2011');
-- Table that holds the columns that are available to be filtered in report.
create table vehicle_cols (
  col_id varchar2(50),
  col_label varchar2(50));
insert into vehicle_cols values ('make','Vehicle Make');
insert into vehicle_cols values ('model','Vehicle Model');
insert into vehicle_cols values ('type','Vehicle Type');
insert into vehicle_cols values ('year','Vehicle Year');
-- Table that holds filters saved by user.
create table vehicle_user_saved (
  saved_rpt_name varchar2(50),
  col_id varchar2(50),
  col_value varchar2(50));
insert into vehicle_user_saved values ('Saved Report One','make','Toyota');
insert into vehicle_user_saved values ('Saved Report One','make','Honda');
insert into vehicle_user_saved values ('Saved Report One','model','Sedan');
insert into vehicle_user_saved values ('Saved Report Two','make','Honda');
insert into vehicle_user_saved values ('Saved Report Two','year',2010);And below is the source query for the region. The textarea value is initially set to null.
-- Region Source for specifying query parameters.
select
  col_label,
  apex_item.checkbox(1,'#ROWNUM#','CHECKED') as include_cols,
  apex_item.hidden(2,col_id)
  || apex_item.textarea(3,null,2,100) as filter_cols
from
  vehicle_cols;When a user clicks the button to load the parameters for a report they have previously saved, I'd like to change the values in the textarea field from null to the saved values from the vehicle_user_saved table so the user can see the parameters and run the report, or modify the parameters if necessary.
I thought I could run a PL/SQL process (After Footer) when the button is clicked to populate these textarea fields, but the test below doesn't do anything:
begin
  apex_application.g_f03(1) := 'Hello';
end;For example, when a user selects to load "Saved Report One," the following parameters should be loaded into the textarea fields:
Column >> Filtered Columns
Vehicle Make >> Honda, Toyota
Vehicle Model >> Sedan
Vehicle Year >> Null
Vehicle Type >> NullCan someone help me out? I wouldn't think I need Ajax for this since it's ok to be processed after the button click. But if I do need to use Ajax, I definitely could use some help with it, as I've never used Ajax before. I've setup this example in my hosted account to help.
Site: http://apex.oracle.com
Workspace: MYHOSTACCT
Username: DEVUSER1
Password: MYDEVACCT
Application: report parameters
Thanks in advance!
Mark
APEX 4.1, Oracle 11g

Answer 1

Hi, thanks for your response.
I'm not adding any new rows, I'm just trying to change the values of the textarea fields in the tabular report when the user chooses to load his/her saved parameters. The default for the textarea field in all rows is null, because I assume users will want to start building the report from scratch. However, when the user clicks the button to load his/her saved values, I want to overwrite the null values with new values. How can I do that?
Thanks,
Mark