Package that defines a stored procedure

Question

how can i write a package which would have store procedure in it.
i have a table called invoice which has invoice_no invoice_date and amount in it and its has around 100 records in it.
how can i write a package which has store procedure in it which would list out the entire contents on the INVOICE table to a calling PL SQL script.
i am trying something something like as under but i am getting error message with it
create or replace package hvinvoice as
procedure hv_invoice(cur_invoice out t_cursor)
is
begin
open cur_invoice for
select * from invoice;
end hv_invoice;
end hvinvoice;
Thanks

Answer 1

872959 wrote:
how can i write a package which would have store procedure in it.
i have a table called invoice which has invoice_no invoice_date and amount in it and its has around 100 records in it.
how can i write a package which has store procedure in it which would list out the entire contents on the INVOICE table to a calling PL SQL script.
i am trying something something like as under but i am getting error message with it
create or replace package hvinvoice as
procedure hv_invoice(cur_invoice out t_cursor)
is
begin
open cur_invoice for
select * from invoice;
end hv_invoice;
end hvinvoice;
ThanksAside from the documentation that Centinul has provided, let's put it in simple terms for you...
A package is generally made of two parts, a "package specification" and a "package body".
The package specification defines any variables, types, constants, cursors, functions and/or procedures that any user of the package should be able to access. By "defines" that means that the functions and procedures are declared in the specification but don't contain any actual code.
The package body is where the code for those functions and procedures is written, along with any other variables, functions, procedures etc. that should only be accessible to that package itself.
So, let's take your code. First we need a package specification:
create or replace package hvinvoice as
  procedure hv_invoice(cur_invoice out sys_refcursor);  -- I've used a sys_refcursor here because it's the most reasonable datatype for passing back a cursor
end;So that's the package specification, which is just defining the procedure to expose to users of the package, without providing the actual code.
Now we need the package body:
This starts off looking similar to the package specification, but has the word "body" in the package declaration...
create or replace package body hvinvoice as
  procedure hv_invoice(cur_invoice out sys_refcursor) is
  begin
    open cur_invoice for
      select * from invoice;
   end hv_invoice;
end;Note: any functions or procedures you declare in the package specification must have an equivalent body of code in the package body. If you miss out the code, the package won't compile without errors.
It's also possible to create just a package specification without a package body, though you'd only do that if you wanted a package that just defined a standard set of constants or variables etc., you wouldn't be able to put functions or procedures in it.
Hope that helps.