I have PL/SQL function looking like:
FUNCTION get_agent_statistics ( id NUMBER
RETURN agent_stats_t
PIPELINED;
And I select from it (iBatis code):
SELECT * FROM table(pkg.get_agent_statistics(#id#))
How should I change this select if I'll remove PIPELINED
statement from function?
When you remove PIPELINED
clause from the function declaration, function ceases to be a PIPELINED table function and as a result you will have to modify the body of the function to convert it to a TABLE function, if you still want to use it the from
clause of the query, or a simple function, which you wont be able to use in the from
clause of a query.
Addendum
Could I select something from non-pipelined function?
Yes, if you have a TABLE function, otherwise no. Here is a couple of examples:
-- prerequisites
SQL> create or replace type T_rows as object(
2 e_name varchar2(21),
3 e_lname varchar2(21)
4 )
5 /
Type created
SQL> create or replace type T_tab is table of t_rows
2 /
Type created
-- PIPELINED TABLE function
SQL> create or replace function GetEnames
2 return T_Tab
3 pipelined
4 is
5 l_etab t_tab := t_tab();
6 begin
7 for i in (select first_name
8 , last_name
9 from employees)
10 loop
11 pipe row(t_rows(i.first_name, i.last_name));
12 --l_etab.extend;
13 --l_etab(l_etab.last) := t_rows(i.first_name, i.last_name);
14 end loop;
15 return ;--l_etab;
16 end;
17 /
Function created
SQL> select *
2 from table(getenames)
3 where rownum <= 5;
E_NAME E_LNAME
--------------------- ---------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
Bruce Ernst
-- non-pipelined table function
SQL> create or replace function GetEnames
2 return T_Tab
3
4 is
5 l_etab t_tab := t_tab();
6 begin
7 for i in (select first_name
8 , last_name
9 from employees)
10 loop
11 --pipe row(t_rows(i.first_name, i.last_name));
12 l_etab.extend;
13 l_etab(l_etab.last) := t_rows(i.first_name, i.last_name);
14 end loop;
15 return l_etab;
16 end;
17 /
Function created
SQL> select *
2 from table(getenames)
3 where rownum <= 5;
E_NAME E_LNAME
--------------------- ---------------------
Steven King
Neena Kochhar
Lex De Haan
Alexander Hunold
Bruce Ernst
SQL>
If you'll get working compiled procedure without PIPELINED
statement, you don't need to change your SELECT
. See this - http://www.oracle-base.com/articles/misc/pipelined-table-functions.php
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