如何在Oracle中修改Collection类型的变量。

在如何在JAVA程序中使用Struct一次传入多条数据给Oracle的存储过程中我介绍了如何通过定义Struct和Array在JAVA程序中一次传入多条数据给Oracle的存储过程。

步骤一：定义对象类型。


CREATE TYPE department_type AS OBJECT (


DNO NUMBER (10),


NAME VARCHAR2 (50),


LOCATION VARCHAR2 (50)


);



步骤二：定义一个对象类型的数组对象。


CREATE TYPE dept_array AS TABLE OF department_type;

步骤三：定义存储过程来插入数据。


CREATE OR REPLACE PACKAGE objecttype AS


PROCEDURE insert_object (d dept_array);


END objecttype;




CREATE OR REPLACE PACKAGE BODY objecttype


AS


PROCEDURE insert_object (d dept_array)


AS


BEGIN


FOR i IN d.FIRST..d.LAST


LOOP


INSERT INTO department_teststruct


VALUES (d(i).dno,d(i).name,d(i).location);


END LOOP;


END insert_object;


END objecttype;



如果我们需要对dept_array类型的d进行的更新的话，那么直接使用下面的语句系统会提示错误。


CREATE OR REPLACE PACKAGE objecttype AS


PROCEDURE insert_object (d dept_array);


END objecttype;




CREATE OR REPLACE PACKAGE BODY objecttype


AS


PROCEDURE insert_object (d dept_array)


AS


BEGIN


FOR i IN d.FIRST..d.LAST


LOOP


d(i).location := 'New Loc'||i;


INSERT INTO department_teststruct


VALUES (d(i).dno,d(i).name,d(i).location);


END LOOP;


END insert_object;


END objecttype;



错误提示： PLS-00363: expression 'D.LOCATION' cannot be used as an assignment target

正确的方法是：


CREATE OR REPLACE PACKAGE BODY objecttype


AS


procedure insert_object(d in out dept_array)


is


begin


for i in 1..d.count loop --与FOR i IN d.FIRST..d.LAST 功能相同


d(i).location := 'New Loc'||i;


INSERT INTO department_teststruct


VALUES (d (i).dno,d (i).name,d (i).location);


end loop;


end insert_object;


END objecttype;

关键问题是：d 必须是output类型(代码中红色粗体标记部分)。

参考内容：http://forums.oracle.com/forums/thread.jspa?messageID=2208830�