Question

I want to combine the data from a table and from a pipelined table function into a single SYS_REFCURSOR. My pipelined table function returns an array of strings

CREATE OR REPLACE FUNCTION function_name
  RETURN string_type
  PIPELINED
IS
BEGIN
  PIPE ROW(pr_package.constant1);
  PIPE ROW(pr_package.constant2);
  RETURN;
END;

I tried to write the query using a scalar subquery

open cur_TEMP for
  Select AR.*,(select * from table(FUNCTION)) from TABLE1 AR

but that throws an error “single-row subquery returns more than one row”.

Answer 1

Since

select * 
  from table(FUNCTION)

returns multiple rows, you cannot use it in a scalar subquery. You could do a Cartesian product between the output of the pipelined table function and the table

OPEN cur_temp
 FOR SELECT ar.*, f.column_value
       FROM table1 ar 
            CROSS JOIN table(function) f;

but it is quite rare that you would intentionally want to generate a Cartesian product. If the table has N rows and the pipelined table function returns M rows, the query I posted will return N * M rows which gets rather large rather quickly. If that’s not what you want, please explain the desired output in a bit more detail.