一种选择是创建带有OUT参数的过程。
由于您没有发布测试用例，我自己创建了一个。
SQL> create table taby as
2 select 1 senderindex, 1 recipientpostindex, 1 senderpostindex from dual;
Table created.
SQL> create table shipment_days as
2 select 5 shipment_days, 1 first_Index, 1 second_index from dual;
Table created.
您的查询转换为过程：
SQL> create or replace procedure getshipmentdays
2 (par_date in out date,
3 par_varsend in varchar2,
4 par_varrec in varchar2,
5 --
6 par_sendix out taby.senderpostindex%type,
7 par_recix out taby.recipientpostindex%type,
8 par_days out shipment_days.shipment_days%type
9 )
10 as
11 begin
12 select par_date,
13 t.senderpostindex,
14 t.recipientpostindex,
15 d.shipment_days
16 into par_date,
17 par_sendix,
18 par_recix,
19 par_days
20 from taby t join shipment_days d on d.first_index = t.senderindex
21 and d.second_index = t.recipientpostindex
22 where t.senderpostindex = par_varsend
23 and t.recipientpostindex = par_varrec;
24 end;
25 /
Procedure created.
测试：由于有多个OUT参数，您必须声明变量以接受它们的值。
SQL> set serveroutput on;
SQL> declare
2 l_date date := date '2020-06-09';
3 l_sendix taby.senderpostindex%type;
4 l_recix taby.recipientpostindex%type;
5 l_days shipment_days.shipment_days%type;
6 begin
7 getshipmentdays(l_date, 1, 1, l_sendix, l_recix, l_days);
8 dbms_output.put_line('date = ' || l_date ||', '||
9 'senderPostindex = ' || l_sendix ||', '||
10 'recipientpostindex = ' || l_recix ||', '||
11 'shipment_days = ' || l_days
12 );
13 end;
14 /
date = 09.06.20, senderPostindex = 1, recipientpostindex = 1, shipment_days = 5
PL/SQL procedure successfully completed.
SQL>
另一种选择是创建一个返回 refcursor 的函数：
SQL> create or replace function fgetshipmentdays
2 (par_date in date,
3 par_varsend in varchar2,
4 par_varrec in varchar2
5 )
6 return sys_refcursor
7 as
8 l_rc sys_refcursor;
9 begin
10 open l_rc for
11 select par_date,
12 t.senderpostindex,
13 t.recipientpostindex,
14 d.shipment_days
15 from taby t join shipment_days d on d.first_index = t.senderindex
16 and d.second_index = t.recipientpostindex
17 where t.senderpostindex = par_varsend
18 and t.recipientpostindex = par_varrec;
19 return l_rc;
20 end;
21 /
Function created.
SQL> var rc refcursor
SQL> exec :rc := fgetshipmentdays(date '2020-06-09', 1, 1);
PL/SQL procedure successfully completed.
SQL> print rc
:B3 SENDERPOSTINDEX RECIPIENTPOSTINDEX SHIPMENT_DAYS
-------- --------------- ------------------ -------------
09.06.20 1 1 5
SQL>
或者，如您所愿，使用表函数。
首先创建类型：
SQL> create type t_sd_row as object
2 (datum date,
3 sendix varchar2(10),
4 recix varchar2(10),
5 days number
6 );
7 /
Type created.
SQL> create type t_sd_tab as table of t_sd_row;
2 /
Type created.
功能：
SQL> create or replace function getshipmentdays
2 (par_date in date,
3 par_varsend in varchar2,
4 par_varrec in varchar2
5 )
6 return t_sd_tab as
7 l_tab t_sd_tab := t_sd_tab();
8 begin
9 select t_sd_row(par_date,
10 t.senderpostindex,
11 t.recipientpostindex,
12 d.shipment_days
13 )
14 bulk collect into l_tab
15 from taby t join shipment_days d on d.first_index = t.senderindex
16 and d.second_index = t.recipientpostindex
17 where t.senderpostindex = par_varsend
18 and t.recipientpostindex = par_varrec;
19 return l_tab;
20 end;
21 /
Function created.
测试：
SQL> select * from table(getshipmentdays(date '2020-06-08', 1, 1));
DATUM SENDIX RECIX DAYS
---------------- ---------- ---------- ----------
08/06/2020 00:00 1 1 5
SQL>