ADF 11g- Selecting Maximum value of a field on Commit Button

Question

Hi
I am trying to assign a value to a field on form by selecting max(id)+1 from database table on commit button.
It assign the value to field but try to commit before assigning value.
code is like this:-
public String commandButton2_action() {                  ////////////////a commit button.
BindingContainer bindings = getBindings();
OperationBinding operationBinding = bindings.getOperationBinding("Commit");
commandButton3_action();////////////Retrieve the maximum value from database.
Object result = operationBinding.execute();
if (!operationBinding.getErrors().isEmpty()) {
return null;
return null;
please do guide. what to do.
Regards
M Niaz

Answer 1

Thanks,
I know, that's why i am try to put this on save button instead on any other.
But this is not an issue whether to use sequence or max()+1. I can use sequence instead but even then i have to get the nextvalue on form before commit.
and i have to put that on commit button.
Commit but try to commit the form before getting anything from DB.
M Niaz