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 YORK20 RESEARCH DALLAS30 SALES CHICAGO40 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,cursor 和 value三种。1.返回类型为pipelined。 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;更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=12本文永久更新链接地址