How can I write this procedure differently - sql

Question

I want to write the following procedure differently so i can call it to return data as if it were a table by doing: SELECT * FROM table(package.get7DayCapacityDemandProv(1, sysdate))
Procesdure:
PROCEDURE get7DayCapacityDemandProv(p_H_id IN work_entity_data.H_id%TYPE
,p_date IN DATE
,p_capacity_day_1 OUT NUMBER
,p_demand_day_1 OUT NUMBER
,p_capacity_day_2 OUT NUMBER
,p_demand_day_2 OUT NUMBER
,p_capacity_day_3 OUT NUMBER
,p_demand_day_3 OUT NUMBER
,p_capacity_day_4 OUT NUMBER
,p_demand_day_4 OUT NUMBER
,p_capacity_day_5 OUT NUMBER
,p_demand_day_5 OUT NUMBER
,p_capacity_day_6 OUT NUMBER
,p_demand_day_6 OUT NUMBER
,p_capacity_day_7 OUT NUMBER
,p_demand_day_7 OUT NUMBER
)
IS
BEGIN
getCapacityDemandOnDayProvider(p_H_id
,p_date
,p_capacity_day_1
,p_demand_day_1
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 1
,p_capacity_day_2
,p_demand_day_2
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 2
,p_capacity_day_3
,p_demand_day_3
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 3
,p_capacity_day_4
,p_demand_day_4
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 4
,p_capacity_day_5
,p_demand_day_5
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 5
,p_capacity_day_6
,p_demand_day_6
);
getCapacityDemandOnDayProvider(p_H_id
,p_date + 6
,p_capacity_day_7
,p_demand_day_7
);
END get7DayCapacityDemandProv;

Answer 1

You want to (1) convert this to a function that returns a record, and then (2) convert that to a pipelined function.
Here's an example. I've left out the first parameter just so I could easily run it, but you can just add that back in.
create or replace package test
as
type theRecordType is record (
day date,
capacity number,
demand number
);
type theTableType is table of theRecordType;
function getData(p_date DATE) return theTableType pipelined;
end test;
/
create or replace package body test
as
function getData(p_date DATE) return theTableType pipelined
as
theRecord theRecordType;
begin
for i in 0..6 loop
theRecord.date := p_date + i;
theRecord.capacity := i;
theRecord.demand := i+1;
--
-- you would have a call to your procedure instead of the above two lines
-- getCapacityDemandOnDayProvider(p_H_id
-- ,theRecord.date
-- ,theRecord.capacity
-- ,theRecord.demand
-- );
--
pipe row (theRecord);
end loop;
return;
end getData;
end test;
/
You can now select from the function and get one row for each day.
select * from table(test.getData(SYSDATE));
I made it a package so the types could be declared within the package header. Alternatively, you could keep it a standalone function and declare the types within the schema using CREATE TYPE.

Answer 2

This is off the cuff, so it is not going to be 100% syntactically correct, but it will be conceptually correct.
create or replace package bingo IS
TYPE bingoCursor is REF CURSOR;
function get7Days(
bingoId IN bingoTable.bingoId%TYPE,
bingoDate IN date)
return bingoCursor;
end bingo;
create or replace package body bingo IS
function get7Days(
bingoId IN bingoTable.bingoId%TYPE,
bingoDate IN date)
return bingoCursor IS
sevenDaysContent bingoCursor;
begin
open sevenDaysContent for
select day 1 stuff;
union all
select day 2 stuff;
union all
... select and union all days 3 - day 7;
return sevenDaysContent;
end get7Days;
end bingo;

Answer 3

Sounds like you want a function or a view. A procedure's returned data can be caught and used within a SQL script but it requires dumping it into a temp or variable table first.
If your requirement is to be able to just do a SELECT * FROM something then you probably want a function or a view.

Answer 4

You could create a function that returns a sys_refcursor. An overly simple example:
create or replace function BLAH(somevar in varchar2) return sys_refcursor IS
v_result_cur sys_refcursor;
v_query varchar2(4000);
...
begin
...
v_query := 'select field1, field2 from blah';
...
open v_result_cur for v_query;
return v_result_cur;
...
exception
...
end;
But I will say this isn't typical. I would probably use a view (or materialized view), or turn those inner procedures into functions and simply select them, like:
select
FN_getCapacityDemandOnDayProvider(someVars) as Day1Val,
FN_getCapacityDemandOnDayProvider(someVars2) as Day2Val
from dual;