Oracle 存储过程 package 使用 Object type

亦凉 2022-04-10 07:17 208阅读 0赞

# [Oracle中定义package以及存储过程的使用][Oracle_package] #

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。

![复制代码][20181228155228154]

1 create or replace package SPTest
     2 is
     3 /*return a pipelined demo start*/
     4 type dept_data_rec_type is RECORD(
     5   DEPTNO NUMBER(2,0),
     6      DNAME VARCHAR2(14)
     7 );
     8 
     9 type dept_ref_type is REF CURSOR;
    10 
    11 function getDept(in_loc IN VARCHAR2) return dept_obj_type pipelined;
    12 /*return a pipelined demo end*/
    13 
    14 /*return a cursor demo start*/
    15 FUNCTION getDeptInfo(in_deptno IN dept.deptno%TYPE) RETURN dept_ref_type;
    16 /*return a cursor demo end*/
    17 
    18 /* return a varchar value start */
    19 function getName(in_deptno in number) RETURN VARCHAR2;
    20 /* return a varchar value end */
    21 end SPTest;
    22 /
    23 -----------------------------------------------------------------------------------------------
    24 create or replace package body SPTest
    25 is
    26   /*return a pipelined demo start*/
    27   function getDept(in_loc IN VARCHAR2) return dept_obj_type pipelined is
    28     l_dept_obj dept_obj :=dept_obj(null, null);
    29     dept_ref_type_cursor dept_ref_type;
    30     dept_data_rec        dept_data_rec_type;
    31   begin
    32     open dept_ref_type_cursor
    33     for select deptno, dname from dept where loc = in_loc;
    34    
    35     loop
    36     fetch dept_ref_type_cursor into dept_data_rec;
    37     exit when dept_ref_type_cursor%NOTFOUND;
    38     l_dept_obj.DEPTNO := dept_data_rec.DEPTNO;
    39     l_dept_obj.DNAME := dept_data_rec.DNAME;
    40    
    41     pipe row(l_dept_obj);
    42     end loop;
    43     close dept_ref_type_cursor;
    44     RETURN ;
    45   end getDept;
    46   /*return a pipelined demo end*/
    47   
    48   /*return a cursor demo start*/
    49   FUNCTION getDeptInfo(in_deptno IN dept.deptno%TYPE) RETURN dept_ref_type
    50   AS
    51           dept_ref_type_cursor dept_ref_type;        
    52      BEGIN
    53     
    54      OPEN dept_ref_type_cursor FOR
    55           SELECT deptno, dname, loc FROM dept where deptno = in_deptno;
    56     
    57      RETURN dept_ref_type_cursor;
    58     
    59      END getDeptInfo;
    60   /*return a cursor demo end*/
    61   
    62   /* return a varchar value start */
    63   function getName(in_deptno in number) RETURN VARCHAR2
    64   as rtn_deptname VARCHAR2(100);
    65   begin
    66     select dname into rtn_deptname from dept where deptno = in_deptno;
    67     RETURN rtn_deptname;
    68   end getName;
    69   /* return a varchar value start */
    70   
    71 end SPTest;
    72 /

![复制代码][20181228155228154]

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;

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