Generate_Sequence_number

How can I control the incrementing during execute_query/panning to a blank record?
I've created a sequence room_sequence that increments by one.
I used this in my block item default property. The problem with this was the sequence automatically incremented by one every time an execute_query was done.
So when I saved a third record the sequence jumped to a higher number which wasn't the next number expected. This also happened whenever I panned to the last empty record.
Obtained result was 1,2 & 16
Expected result should be 1,2 & 3
I removed the default value property and moved it to the item's when-new-record trigger but the sequencing didn't work from this trigger.
Any tips?

I tried your suggestion, I even tried it on pre-update but I got the same message for pre-insert and pre-update. "TOO MANY ROWS"
this is part of my code
SELECT my_seq.nextval into variable from tablename
:item_name := variable;
Do you have other ideas?
Thank you for your response. In your example above, which table are you doing the select from?
Sounds to me like you4re getting multiple records in return where
you only want a singular record.
I4d suggest you do it like this instead:
select my_seq.nextval into :item_name from dual;
Should work nicely in a PRE-INSERT trigger.
//Dick

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How I must use GENERATE_SEQUENCE_NUMBER?

I have a form that has a detail and I want generate a unique
sequence number when a record is created. But I don't know how
use the GENERATE_SEQUENCE_NUMBER built-in. Somebody could help
me?
Thanks
null

I see... In this case you can redefine the triggers
"KEY-DELREC" and "KEY-CREREC" for this block and before
calling the corresponding procedures "DELETE_RECORD" and
"CREATE_RECORD", you call a local procedure to resequence
these numbers. This procedure also sets a global variable
to be used as "Inital Value" if you are inserting a record.
item : detail.item
Initial Value = :global.next_item
trigger : when-new-record (master block)
:global.next_item := '1';
trigger : key-delrec (detail block)
delete_record;
resequence_items('DELETE');
trigger : key-crerec (detail block)
resequence_items('INSERT');
create_record;
procedure : resequence_items
procedure resequence_items (
p_operation in varchar2
) is
v_cursor_record pls_integer;
v_top_record pls_integer;
v_position pls_integer;
begin
if :system.record_status = 'NEW' then
return;
end if;
v_top_record :=
get_block_property(:system.cursor_block,top_record);
v_cursor_record := to_number(:system.cursor_record);
if p_operation = 'INSERT' then
v_position := v_cursor_record + 1;
:global.next_item := to_char(v_position);
down;
loop
exit when :system.record_status = 'NEW';
v_position := v_position + 1;
:detail.item := v_position;
down;
end loop;
end if;
if p_operation = 'DELETE' then
v_position := v_cursor_record;
loop
exit when :system.record_status = 'NEW';
:detail.item := v_position;
v_position := v_position + 1;
down;
end loop;
end if;
go_record(v_top_record);
go_record(v_cursor_record);
end;
null

Generate_Sequence_number

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