Execution process CALL_FORM

Question

When we are using call_form('form_name') what are the steps that the forms runtime will follow?
Will it execute the form level trigger and then bolck level triggers? Can i know the steps involved when we use call_form('form_name').
Please let me know of any documentation that explains this.
My scenario is
I have a form with a button. when i click on the button a button trigger is fired and it will call another form using call_form. the called form is having one form level trigger WHEN-NEW-FORM-INSTANCE . i gave some alerts to be displayed in the PL/SQL block of the tirgger. but when i run the form . I am not able to see the alerts poped out.
Is there any way to know what query is fired to the database when we use execute_query on a block.
Many Thanks
Suresh
Edited by: user2359946 on 02-Oct-2009 09:18

Answer 1

hi try this.
on-error trigger.
DECLARE
errcode NUMBER := ERROR_CODE;
dbmserrcode NUMBER;
dbmserrtext VARCHAR2(200);
BEGIN
IF errcode = 40508 THEN
** Form Builder had a problem INSERTing, so
** look at the Database error which
** caused the problem.
dbmserrcode := DBMS_ERROR_CODE;
dbmserrtext := DBMS_ERROR_TEXT;
IF dbmserrcode = -1438 THEN
** ORA-01438 is "value too large for column"
Message(’Your number is too large. Try again.’);
ELSIF dbmserrcode = -1400 THEN
** ORA-01400 is "Mandatory column is NULL"
Message(’You forgot to provide a value. Try again.’);
ELSE
** Printout a generic message with the database
** error string in it.
71
Message(’Insert failed because of ’||dbmserrtext);
END IF;
END IF;
END;
On-error trigger.
DECLARE
errnum NUMBER := ERROR_CODE;
errtxt VARCHAR2(80) := ERROR_TEXT;
errtyp VARCHAR2(3) := ERROR_TYPE;
BEGIN
IF errnum = 40301 THEN
Message(’Your search criteria identified no matches...
Try Again.’);
ELSIF errnum = 40350 THEN
Message(’Your selection does not correspond to an
employee.’);
ELSE
** Print the Normal Message that would have appeared
** Default Error Message Text Goes Here
Message(errtyp||’-’||TO_CHAR(errnum)||’: ’||errtxt);
RAISE Form_trigger_Failure;
END IF;
END;
sarah