Tabular Form - Setting a default value just on first row.

Question

Hi all,
how to set a tabular form default value only in the first row?
When I click on "add row" I want the new row have a blank value.
Thanks in advance.

Answer 1

Hi,
When you add a new row to the tabular form, any existing rows should be saved to the database. You can, therefore, check for the existence of such records and set the value of a hidden page item accordingly. The default value for a tabular form item can then be based on this hidden item.
This can be done by setting the Source Used to "Always, ..." on the hidden item called, say, P1_DEPTNO_DEFAULT, and the Source to something like:
DECLARE
X NUMBER;
BEGIN
SELECT COUNT(*) INTO X FROM EMP WHERE DEPTNO = :P1_DEPTNO;
IF X > 0 THEN
  RETURN '';
ELSE
  RETURN :P1_DEPTNO;
END IF;
END;This is a "PL/SQL Function Body" Source Type.
In this example, we are checking if there are any EMP records with a DEPTNO value that matches P1_DEPTNO. If there are, then the tabular form must contain at least one row already, so we return an empty string. If there are no records, the tabular form must be empty, so we return the P1_DEPTNO value.
The Default settings on the DEPTNO column in the tabular form would then be:
Default Type: Item (application or page item name)
Default: P1_DEPTNO_DEFAULT
Andy