自动生成类型

Question

我在PL/SQL包中创建了一个函数，该函数使用定义为数字表的自定义类型。我使用这种类型的目的在与SELECT COLUMN_VALUE指令像这样的SQL查询：

在包类型定义：

type T_IDS is table of my_table.col_id%type; 

在封装主体的过程内的查询：

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，当我编译这段代码时，我可以看到在我的schema_name/type部分下生成的新类型。

一旦我将它安装在测试环境中，失败与错误编译：

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

数据库版本（本地和测试）是完全一样的，11G。有没有办法在DBMS上激活这样的一代？

为例重现：

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; 

包创建：

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

你在做什么是错的。你应该创建SQL类型并且不使用pl/sql类型来访问TABLE函数。

现在至于为什么它实际上在你的开发环境中工作。

无声的pl/sql表创建旨在用于流水线功能，并且已经存在了一段时间，但是您在非流水线功能中使用它，因此这应该失败。但在11g第1版（准确地说是11.1.0.7）中，一个错误意味着它实际上编译了。如果你真的想运行它，虽然你会得到一个错误：

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 

现在，甲骨文在11.2.0.3修正了这个错误行为。现在的错误是在编译时抛出：

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 

总之

，与create type和使用创建一个SQL类型来代替：

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