SQL no data found exception not getting executed - sql

Question

Below is the code which has to execute the exception block when no data is found in the main block. However the exception block is not getting executed even when the query doesn't return any record. The query joins with another table and when the result matches with the query it will pick the 1st record else it has to assign null values to the fields and return the cursor to UI. The count below for the cursor is always 0 and the exception block isn't getting executed .
BEGIN
wf_common.write_debug(vprocname, ' 111=', ts);
OPEN cinfo FOR SELECT
name,
phone,
alt_phone,
email
FROM
abc
WHERE
id IN (
SELECT
id
FROM
xyz
WHERE
emp_no = vempno
)
AND name IS NOT NULL
AND ROWNUM = 1;
wf_common.write_debug(vprocname, 'COUNT' || cinfo%rowcount, ts);
EXCEPTION
WHEN no_data_found THEN
wf_common.write_debug(vprocname, '222=', ts);
OPEN cinfo FOR SELECT
'' name,
'' phone,
'' alt_phone,
'' email
FROM
dual;
wf_common.write_debug(vprocname, 'COUNT' || cinfo%rowcount, ts);
END;

Answer 1

Replace WHEN NO_DATA_FOUND with
WHEN OTHERS

Answer 2

This is a cursor. It doesn't raise no_data_found. How will you know whether it'll return something or not? You won't until you
open it
fetch from it
Then you'll know.
So - unfortunately - you'll first have to check, and then decide what to do. For example (based on Scott's sample schema):
SQL> create or replace function f_test (par_deptno in emp.deptno%type)
2 return sys_refcursor
3 is
4 type cinfot is record (empno emp.empno%type,
5 ename emp.ename%type,
6 job emp.job%type);
7 cinfor cinfot;
8 cinfo sys_refcursor;
9 begin
10 -- in order to test whether it returns something, open & fetch
11 open cinfo for 'select empno, ename, job
12 from emp
13 where deptno = :a' using par_deptno;
14 fetch cinfo into cinfor;
15
16 -- has anything been found?
17 if cinfo%found then
18 -- something has been found - process it
19 close cinfo;
20 open cinfo for 'select empno, ename, job
21 from emp
22 where deptno = :a' using par_deptno;
23
24 else
25 -- nothing has been found; open another cursor
26 close cinfo;
27 open cinfo for select deptno, dname, loc
28 from dept;
29 end if;
30
31 return cinfo;
32 end;
33 /
Function created.
Testing: department 10 exists in EMP table so - return its contents:
SQL> select f_test(10) From dual;
F_TEST(10)
--------------------
CURSOR STATEMENT : 1
CURSOR STATEMENT : 1
EMPNO ENAME JOB
---------- ---------- ---------
7782 CLARK MANAGER
7839 KING PRESIDENT
7934 MILLER CLERK
Department 50 doesn't exist so - return DEPT table's contents:
SQL> select f_test(50) From dual;
F_TEST(50)
--------------------
CURSOR STATEMENT : 1
CURSOR STATEMENT : 1
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL>