自動生成類型

Question

我在PL/SQL包中創建了一個函數，該函數使用定義爲數字表的自定義類型。我使用這種類型的目的在與SELECT COLUMN_VALUE指令像這樣的SQL查詢：

在包類型定義：

type T_IDS is table of my_table.col_id%type; 

在封裝主體的過程內的查詢：

l_ids_list T_IDS ; 
begin 
select col_ids bulk collect into T_IDS from my_table; 
select sum(t.rec_value) into total_value 
      from my_table t where t.col_id in (
      select column_value from Table(l_ids_list)); 

一切工作正常，當我編譯這段代碼時，我可以看到在我的schema_name/type部分下生成的新類型。

一旦我將它安裝在測試環境中，失敗與錯誤編譯：

Error: PLS-00642: local collection types not allowed in SQL statements
Error: PL/SQL: ORA-22905: cannot access rows from a non-nested table item

數據庫版本（本地和測試）是完全一樣的，11G。有沒有辦法在DBMS上激活這樣的一代？

爲例重現：

create table my_table (
col_id number, 
rec_value number 
); 

insert into my_table (col_id, rec_value) values (1,100); 
insert into my_table (col_id, rec_value) values (2,200); 
insert into my_table (col_id, rec_value) values (3,300); 
insert into my_table (col_id, rec_value) values (4,400); 

commit; 

包創建：

create or replace package test_pck as 

type T_IDS is table of my_table.col_id%type; 

procedure test_list; 

end test_pck; 
/

create or replace 
package body test_pck as 

procedure test_list is 
    l_ids_list T_IDS ; 
    total_value number; 
begin 
    select col_id bulk collect into l_ids_list from my_table; 
    select sum(t.rec_value) into total_value 
      from my_table t where t.col_id in (
       select column_value from Table(l_ids_list)); 
end test_list; 
end test_pck; 
/

Answer 1

你在做什麼是錯的。你應該創建SQL類型並且不使用pl/sql類型來訪問TABLE函數。

現在至於爲什麼它實際上在你的開發環境中工作。

無聲的pl/sql表創建旨在用於流水線功能，並且已經存在了一段時間，但是您在非流水線功能中使用它，因此這應該失敗。但在11g第1版（準確地說是11.1.0.7）中，一個錯誤意味着它實際上編譯了。如果你真的想運行它，雖然你會得到一個錯誤：

SQL> create package body foo 
    2 as 
    3 
    4 procedure test 
    5  is 
    6    l_ids_list T_IDS ; 
    7    total_value number; 
    8  begin 
    9    select col_id bulk collect into l_ids_list from my_table; 
10    select sum(t.rec_value) into total_value 
11    from my_table t 
12    where t.col_id in (select column_value from Table(l_ids_list)); 
13  end; 
14 end; 
15/

Package body created. 

SQL> exec foo.test; 
BEGIN foo.test; END; 

* 
ERROR at line 1: 
ORA-21700: object does not exist or is marked for delete 
ORA-06512: at "TEST.FOO", line 10 
ORA-06512: at line 1 
SQL> select * from v$version; 

BANNER 
-------------------------------------------------------------------------------- 
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production 
PL/SQL Release 11.2.0.2.0 - Production 
CORE 11.2.0.2.0  Production 
TNS for Linux: Version 11.2.0.2.0 - Production 
NLSRTL Version 11.2.0.2.0 - Production 

現在，甲骨文在11.2.0.3修正了這個錯誤行爲。現在的錯誤是在編譯時拋出：

SQL> create package body foo 
    2 as 
    3 
    4 procedure test 
    5  is 
    6    l_ids_list T_IDS ; 
    7    total_value number; 
    8  begin 
    9    select col_id bulk collect into l_ids_list from my_table; 
10    select sum(t.rec_value) into total_value 
11    from my_table t 
12    where t.col_id in (select column_value from Table(l_ids_list)); 
13  end; 
14 end; 
15/

Warning: Package Body created with compilation errors. 

SQL> show errors 
Errors for PACKAGE BODY FOO: 

LINE/COL ERROR 
-------- ----------------------------------------------------------------- 
10/3  PL/SQL: SQL Statement ignored 
12/48 PL/SQL: ORA-22905: cannot access rows from a non-nested table 
     item 

12/54 PLS-00642: local collection types not allowed in SQL statements 
SQL> select * from v$version; 

BANNER 
-------------------------------------------------------------------------------- 
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production 
PL/SQL Release 11.2.0.3.0 - Production 
CORE 11.2.0.3.0  Production 
TNS for Linux: Version 11.2.0.3.0 - Production 
NLSRTL Version 11.2.0.3.0 - Production 

總之

，與create type和使用創建一個SQL類型來代替：

SQL> create type T_IDS as table of number; 
    2/

Type created. 

SQL> create package body foo 
    2 as 
    3 
    4 procedure test 
    5  is 
    6    l_ids_list T_IDS ; 
    7    total_value number; 
    8  begin 
    9    select col_id bulk collect into l_ids_list from my_table; 
10    select sum(t.rec_value) into total_value 
11    from my_table t 
12    where t.col_id in (select column_value from Table(l_ids_list)); 
13  end; 
14 end; 
15/

Package body created. 

SQL> exec foo.test 

PL/SQL procedure successfully completed. 

SQL> select * from v$version; 

BANNER 
-------------------------------------------------------------------------------- 
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production 
PL/SQL Release 11.2.0.3.0 - Production 
CORE 11.2.0.3.0  Production 
TNS for Linux: Version 11.2.0.3.0 - Production 
NLSRTL Version 11.2.0.3.0 - Production