Oracle中定义package以及存储过程的使用

使用scott账户下的dept表；

select * from dept order by deptno;

10 ACCOUNTING NEW YORK

20 RESEARCH DALLAS

30 SALES CHICAGO

40 OPERATIONS BOSTON

为了演示方便，插入一条数据：

insert into dept(deptno, dname, loc) values(50,'SYSTEM', 'NEW YORK');

新插入的记录为：50 SYSTEM NEW YORK

我们主要演示在package中存储过程的返回类型为pipelined table，cursor 和 value三种。

1.返回类型为pipelined table。　　

create or REPLACE type dept_obj is OBJECT( DEPTNO NUMBER(2,0), DNAME VARCHAR2(14 BYTE) );

create or REPLACE type dept_obj_type AS table of dept_obj;

2.定义package 和package body。

 create or replace package SPTest
 is
 /*return a pipelined demo start*/
 type dept_data_rec_type is RECORD(
   DEPTNO NUMBER(2,0),
      DNAME VARCHAR2(14)
 );

 type dept_ref_type is REF CURSOR;

 function getDept(in_loc IN VARCHAR2) return dept_obj_type pipelined;
 /*return a pipelined demo end*/

 /*return a cursor demo start*/
 FUNCTION getDeptInfo(in_deptno IN dept.deptno%TYPE) RETURN dept_ref_type;
 /*return a cursor demo end*/

 /* return a varchar value start */
 function getName(in_deptno in number) RETURN VARCHAR2;
 /* return a varchar value end */
 end SPTest;
 /
 -----------------------------------------------------------------------------------------------
 create or replace package body SPTest
 is
   /*return a pipelined demo start*/
   function getDept(in_loc IN VARCHAR2) return dept_obj_type pipelined is
     l_dept_obj dept_obj :=dept_obj(null, null);
     dept_ref_type_cursor dept_ref_type;
     dept_data_rec        dept_data_rec_type;
   begin
     open dept_ref_type_cursor
     for select deptno, dname from dept where loc = in_loc;

     loop
     fetch dept_ref_type_cursor into dept_data_rec;
     exit when dept_ref_type_cursor%NOTFOUND;
     l_dept_obj.DEPTNO := dept_data_rec.DEPTNO;
     l_dept_obj.DNAME := dept_data_rec.DNAME;

     pipe row(l_dept_obj);
     end loop;
     close dept_ref_type_cursor;
     RETURN ;
   end getDept;
   /*return a pipelined demo end*/

   /*return a cursor demo start*/
   FUNCTION getDeptInfo(in_deptno IN dept.deptno%TYPE) RETURN dept_ref_type
   AS
           dept_ref_type_cursor dept_ref_type;
      BEGIN

      OPEN dept_ref_type_cursor FOR
           SELECT deptno, dname, loc FROM dept where deptno = in_deptno;

      RETURN dept_ref_type_cursor;

      END getDeptInfo;
   /*return a cursor demo end*/

   /* return a varchar value start */
   function getName(in_deptno in number) RETURN VARCHAR2
   as rtn_deptname VARCHAR2(100);
   begin
     select dname into rtn_deptname from dept where deptno = in_deptno;
     RETURN rtn_deptname;
   end getName;
   /* return a varchar value start */

 end SPTest;
 /

最后，执行存储过程。

/*返回pipelined table */

select deptno, dname from table(SPTest.getDept('NEW YORK')) order by deptno;

/*返回cursor*/

select SPTest.getDeptInfo(10) from dual;

/*返回具体值*/

select SPTest.getName(50) from dual;