How to use arrays in stored procedure??Please do help me.......

Question

hi, i need to make a procedure where i may execute a query.The query returns multiple rows.Now i want to use 1 row.i needs to fetch all colums as out parameter...can anyone please help me.....i will be very thankful to the person.

Answer 1

you cannot just force only one column from a select statement to be a out parameter, you need to collect all the columns into a collection type and use the collection type as out parameter or use refcursor as out parameter and fetch the rows
using collection type
create type obj_typ is object(
a_val number,
b_val varchar2(100)
create type nest_typ is table of obj_typ
create or replace procedure retrieve_emp(mgr_no number,e_details out nest_typ) is
begin
select obj_typ(empno,ename) bulk collect into e_details from emp
where mgr = mgr_no;
end;
declare
nest_var nest_typ;
begin
retrieve_emp(7698,nest_var);
for i in 1..nest_var.count loop
dbms_output.put_line(nest_var(i).a_val || ' - '||nest_var(i).b_val);
end loop;
end;
7499 - ALLEN
7521 - WARD
7654 - MARTIN
7844 - TURNER
7900 - JAMESUsing ref cursor
create or replace procedure retrieve_emp2(mgr_no number,e_details out sys_refcursor) is
begin
OPEN e_details FOR select empno,ename from emp
where mgr = mgr_no;
end;
declare
empno_val emp.empno%type;
ename_val emp.ename%type;
edetails_ref_Cur sys_refcursor;
begin
retrieve_emp2(7698,edetails_ref_Cur);
loop
fetch edetails_ref_cur into empno_val,ename_val;
exit when edetails_ref_cur%notfound;
dbms_output.put_line(empno_val ||' - '||ename_val);
end loop;
close edetails_ref_cur;
end;
7499 - ALLEN
7521 - WARD
7654 - MARTIN
7844 - TURNER
7900 - JAMESHTH,
Prazy