Alert javascript in PL/SQL procedure

Question

Hello,
On clicking on a button to execute an sql command, If I test a value=0, so I would like to show a message like alert("Impossible to do that !");
Is it possible ?
Here is my very simple PL/SQL procedure :
declare
nbwo number(10);
begin
select count(*) into nbwo from [email protected] where lticketid=:P63_lticketid;
if nbwo > 0 then
update [email protected] set etat=1 where lticketid=:P63_lticketid;
commit;
else
"Show a javascript alert"
end if;
end;
Thanks for help,
Fred

Answer 1

Fred,
If you are rendering a page you can make a plsql process generate html that the browser can display. htp.p(' html here');
declare
nbwo number(10);
begin
select count(*) into nbwo from [email protected] where lticketid=:P63_lticketid;
if nbwo > 0 then
update [email protected] set etat=1 where lticketid=:P63_lticketid;
commit;
else
htp.p(' html here');
end if;
end;
However I can see you having some issues.
1: You need to call a page and have this process run while the page renders. It won't work for a submit process. It is still possible.
2: You need to decide what to do with the page you are rendering. You could render the page as normal and just pop this html code in before the footer.
Probably the best bet is to do this with an ajax call. eg press button, call jscript function, jscript function calls database to do this work, database call returns a success or fail message. Display results to user.
I would recommend the ajax call. It works very well for this type of thing.
Chris