Cursor Jumping to last record when query mode for Multi-record block.

Question

I have a multi-record block. the seq field has this validation to check that there should not be a gap
in sequence for S_type and cer_dl field.The program unit is as below.
PROCEDURE seq_validation IS
--Validation to check that there is no gaps in sequence for S_TYPE and cer_dl fields
l_value_to_check varchar2(100);
l_seq_found number;
l_curr_sequence number;
l_new_value varchar2(100);
l_found boolean:=FALSE;
l_new_set boolean := FALSE; --s_type and cer_dl are different from previous set.
begin
if trim(:b1.s_type) is not null
or trim(:b1.cer_dl) is not null
then
-- Program continues here only if all the items are not null
-- Get information from record that needs to be validated
l_value_to_check := trim(:b1.s_type) || ':'|| trim(:b1.cer_dl) ;
l_curr_sequence := :sequence;
if :SYSTEM.CURSOR_RECORD = '1' then
---to check sequence is entered as 1 in the first record
message('Error:Sequence should start with 1');
raise form_trigger_failure;
end if;
go_item('b1.XYZ');
else
FIRST_RECORD;
while :SYSTEM.LAST_RECORD != 'TRUE'
loop
l_found := FALSE;
l_new_value := trim(:b1.S_type) || ':'|| trim(:cer_dl) ;
if l_new_value = l_value_to_check then --
l_new_set:= FALSE;
l_seq_found := :seq;
if l_seq_found >= l_curr_sequence then
go_item('b1.seq');
l_new_set := FALSE;
elsif l_seq_found < l_curr_sequence - 1 then
go_item('b1.sequence');
l_found := FALSE;
elsif l_seq_found = l_curr_sequence - 1 then
l_found:= TRUE;
go_item('b1.xyz); --go to next item
end if;
else
l_new_set := TRUE;
end if;
NEXT_RECORD;
end loop;
if l_new_set then
go_item('b1.xyz'); -- go to next item
else
if not l_found then
message('Error:Sequence should be in order.');
go_item('b1.seq');
raise form_trigger_failure;
end if;
end if;
go_item('b1.xyz'); ---go to next item
end if;
end if;
end;     
In the insert mode its working fine(unless you gurus feel to change to make it more perfect.
When I say enter-query and put 'IAS' in the s_type field and then do a execute query it brings all the records of 'IAS'.
Now as I want to update the records, and when I navigate across field(s_type,cer_dl,Seq,xyz) using tab and move the cursor down on second
record(IAS N 2 N), what happens is when I navigate to sequence field the cursor jumps to LAST RECORD( IAS Y 3 N ) of LAST field XYZ.
I am putting the sample record
s_type cer_dl seq xyz
IAS N 1 N
IAS N 2 N
IAS N 3 N
IAS N 4 N
IAS Y 1 N
IAS Y 2 N
IAS Y 3 N
The cursor moves to last record --IAS -Y -3-N when I tab across the second record.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer 1

When I say enter-query and put 'IAS' in the s_type field...For your validation to work you must not allow users to enter records in the middle of a block, clear records from the block or query specific records. If you allow the users to enter a query then you are allowing 2 of the rules to be broken.