Question about finding whether a reference number is NOT in the database?

Question

Hello,
I use the following code to test whether the reference number is in the database
<ul><li>CURSOR cur_yellow</li></ul>
<ul><li>IS SELECT</li></ul>
<ul><li>REFERENCE_NO,</li></ul>
<ul><li>COMPANY_NAME</li></ul>
<ul><li>FROM CONSULTANTS;</li></ul>
<ul><li>rec_yellow cur_yellow%ROWTYPE;</li></ul>
<ul><li>BEGIN</li></ul>
<ul><li> OPEN cur_yellow;</li></ul>
<ul><li> LOOP</li></ul>
<ul><li> FETCH cur_yellow INTO rec_yellow;</li></ul>
<ul><li> EXIT WHEN cur_yellow%NOTFOUND;</li></ul>
<ul><li> IF ref_no = rec_yellow.REFERENCE_NO</li></ul>
<ul><li> THEN</li></ul>
HTP.print ('<ul><li><span class="style5">The information concerning the consultant selected has been deleted from the database.</span></li></ul>');
<ul><li> exp := 1; -- used to make code bullet proof</li></ul>
<ul><li> END IF;</li></ul>
<ul><li> END LOOP;</li></ul>
<ul><li> CLOSE cur_yellow;</li></ul>
Do you have any ideas for how to write code to test whether the reference number is NOT in the database.
Thanks
Doug

Answer 1

Hallo,
in general, yes, but I think , it will be better without cursor:
declare
v_dummy number;
BEGIN
EXECUTE IMMEDIATE 'select 1 from dual where
exists (select 1 from user_indexes where index_name = : ind_name) USING ''DOUGLASMYINDEX'
INTO v_1;
-- something
EXCEPTION
WHEN NO_DATA_FOUND
THEN
NULL;
END;
Is it necessary to perform it in dynamic SQL ?
declare
v_dummy number;
BEGIN
select 1 into v_1 from dual where
exists (select 1 from user_indexes where index_name = ''DOUGLASMYINDEX''')
INTO v_1;
-- something
EXCEPTION
WHEN NO_DATA_FOUND
THEN
NULL;
END;
Regards
Dmytro Dekhtyaryuk