表格和样本数据(COLUMN1的数字为1 – 10)：

create table table1(column1 number,column2 date,column3 varchar2(1000),column4 clob);

insert into table1
select level,sysdate,level,level from dual connect by level <= 10;
commit;

打包一个打开引用游标并选择所有内容的过程的包：

create or replace package test_pkg is
    type cur_Table1 is ref cursor return table1%rowtype;
    procedure sp1(p_cursor in out cur_table1);
end;
/

create or replace package body test_pkg is
    procedure sp1(p_cursor in out cur_table1) is
    begin
        open p_cursor for select column1,column2,column3,column4 from table1;
    end;
end;
/

从ref游标中读取COLUMN1数据的PL / sql块：

--Basic steps are: call procedure,convert cursor,describe and find columns,--then fetch rows and retrieve column values.
--
--Each possible data type for COLUMN1 needs to be added here.
--Currently only NUMBER is supported.
declare
    v_cursor sys_refcursor;
    v_cursor_number number;

    v_columns number;
    v_desc_tab dbms_sql.desc_tab;
    v_position number;
    v_typecode number;
    v_number_value number;
begin
    --Call procedure to open cursor
    test_pkg.sp1(v_cursor);
    --Convert cursor to DBMS_sql cursor
    v_cursor_number := dbms_sql.to_cursor_number(rc => v_cursor);
    --Get information on the columns
    dbms_sql.describe_columns(v_cursor_number,v_columns,v_desc_tab);

    --Loop through all the columns,find COLUMN1 position and type
    for i in 1 .. v_desc_tab.count loop
        if v_desc_tab(i).col_name = 'COLUMN1' then
            v_position := i;
            v_typecode := v_desc_tab(i).col_type;

            --Pick COLUMN1 to be selected.
            if v_typecode = dbms_types.typecode_number then
                dbms_sql.define_column(v_cursor_number,i,v_number_value);
            --...repeat for every possible type.
            end if;
        end if;
    end loop;

    --Fetch all the rows,then get the relevant column value and print it
    while dbms_sql.fetch_rows(v_cursor_number) > 0 loop
        if v_typecode = dbms_types.typecode_number then
            dbms_sql.column_value(v_cursor_number,v_position,v_number_value);
            dbms_output.put_line('Value: '||v_number_value);
        --...repeat for every possible type
        end if;
    end loop;   
end;
/