How to call Oracle function which has SYS_REFCURSOR as OUT Parameter

问题

create or replace
FUNCTION test_fun (
p_ref_cur               OUT SYS_REFCURSOR,
p_a_code            IN  NUMBER                                  DEFAULT 0,
p_category          IN  package.category%TYPE           DEFAULT NULL,
p_name              IN  package.name%TYPE           DEFAULT NULL,
p_display_name      IN  package.display_name%TYPE   DEFAULT NULL,
p_rowid             IN  package."rowid"%TYPE                DEFAULT NULL,
p_flg               IN  package.flg%TYPE                DEFAULT '1',
p_mod_dat           IN  package.mod_dat%TYPE            DEFAULT SYSTIMESTAMP,
p_mod_usr           IN  package.mod_usr%TYPE            DEFAULT NULL
)
RETURN NUMBER
AS

How to call this function in oracle which has SYS_REFCURSOR as OUT parameter?

Update: **test_fun** will be called from another function say caller() where the complete function to be executed will be taken from the database and execute using execute immediate command.

SELECT command into cmd from data_table where id=p_id;
execute immediate (cmd);

cmd value will be like

test_fun(v_cv1,0, 'pp', 'np123', 'np', NULL, 1, NULL, 'testuser');

NOTE: We have control over the caller() function and cmd to be execute but no control over test_fun()

Any help is much appreciated.

回答1:

Just declare a variable of type SYS_REFCURSOR in the calling block, and call your function, e.g. from SQL/Plus:

 set autoprint on;
 var cur refcursor;

 declare
      FUNCTION test_fun (
        p_ref_cur               OUT SYS_REFCURSOR)
      RETURN NUMBER is
      begin
        open p_ref_cur for select * from dual;
        return 1;
      end;

 begin
     dbms_output.put_line(test_fun(:cur));
 end;
 /

回答2:

This procedure did the magic

  PROCEDURE executecmd(cmd_in IN VARCHAR2)
          AS
          v_cv1 SYS_REFCURSOR;
          BEGIN
                 dbms_output.put_line('Executing cmd: '|| cmd);

                 execute immediate 'declare
                    result number;
                   BEGIN
                    result:='||cmd_in||';'||
                   'END;'
                   USING v_cv1;
          END;

来源：https://stackoverflow.com/questions/13579672/how-to-call-oracle-function-which-has-sys-refcursor-as-out-parameter