Oracle管道函數(Pipelined Table Function)實現的實例

1. 簡單的例子(返回單列的表)

1>創建一個表類型

create or replace type t_table is table of number;

 

2>創建函數返回上面定義的類型

create or replace function f_pipe(s number)
return t_table pipelined
as
    v_number number;   
begin    
for i in 1..s loop 
    v_number := i;
    pipe row(v_number);   
end loop;
return;
end f_pipe;

    ;

3>測試

select * from table(f_pipe(5))

 

2.復雜一點的例子

1>創建一個表類型(有多個列)

create or replace type obj_table as object
(
  id int,
  name varchar2(50)
)

 

2>創建函數返回上面定義的類型

create or replace function f_pipe(s number)
return t_table pipelined
as
    v_obj_table obj_table;   
begin    
for i in 1..s loop 
    v_obj_table :=  obj_table(i,to_char(i*i));
    pipe   row(v_obj_table);   
end loop;
return;
end f_pipe;

 

3>測試

select * from table(f_pipe(5))