Question

我有这个功课，我必须在嵌套表中添加程序，这里是结构

create type associe_t as Object(noAs int, nomAs varchar(50), capAs int)
/
create type lesAssocies_t as TABLE OF associe_t
/
create type promoteur_t as Object(matP int, nomP varchar(50), adrP varchar(50), lesAssocies lesAssocies_t)
/
create table promoteur of promoteur_t (
    constraint pk_promoteur primary key(matP));

create table promoteur of promoteur_t (
    constraint pk_promoteur primary key(matP),
    constraint limCapAs check (capAs <= 1 000 000)
) tableSpace TBS3202A2012
NESTED TABLE lesAssocies STORE AS Table_lesAssocies ;

我想要一个associe_t类型的方法，它可以根据参数中传递的数字更新记录中的值。

所以我尝试将方法签名添加到我的类型中：

alter type associe_t add member procedure augmenteCapAs(P IN number) cascade ;

我试图在以下情况后添加该程序的主体：

CREATE or replace TYPE BODY associe_t AS
MEMBER procedure augmenteCapAs(P in number ) AS 
  BEGIN 
    update Table_lesAssocies t set t.capAs = P/100 where t.noAs = self.noAs;
  END;
END;
/

如果我使用表名Table_lesAssocies它会给我以下错误：

ORA-22812: cannot reference nested table column's storage table

如果我使用表名lesAssocies_t，它会告诉我该表不存在。

我做错了什么？我很确定我不应该使用该表的物理名称（Table_lesAssocies）

我应该使用哪个表名？

Answer 1

如错误消息所述，您无法直接访问（检索或存储）嵌套表的列 - 仅通过外部表。因此，您可以按如下方式重写代码：

SQL> create type associe_t as Object(noAs int, nomAs varchar(50), capAs int)
  2  /

Type created


SQL> create type lesAssocies_t as TABLE OF associe_t
  2  /

Type created


SQL> create type promoteur_t as Object(matP int, nomP varchar(50), adrP varchar(50), lesAssocies lesAssocies_t)
  2  /

Type created


SQL> create table tb_promoteur of promoteur_t (
  2      constraint pk_promoteur primary key(matP)
  3  )tablespace users
  4  NESTED TABLE lesAssocies STORE AS Table_lesAssocies;

Table created

SQL> alter table table_lesassocies add constraint chk_capas check (capas < 1000000);

Table altered

SQL> alter type associe_t add member procedure augmenteCapAs(P IN number) cascade ;

Type altered


SQL> CREATE OR REPLACE TYPE BODY associe_t AS
  2  MEMBER procedure augmenteCapAs(P in number ) AS
  3    BEGIN
  4      update table(select lesAssocies
  5                     from tb_promoteur) t
  6         set t.capAs = P/100
  7       where t.noAs = self.noAs;
  8    END;
  9  END;
 10  /

Type body created

Oracle - 向嵌套表添加方法（过程）

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