oracle存储过程及REFCURSOR的使用(二)
d%type,
n_name out user_info.name%type,
n_pwd out user_info.pwd%type
)
as
begin
select user_info.name, user_info.pwd into n_name, n_pwd
from user_info
where user_info.id=n_id;
end pro_getUserInfo;
--调用
declare
v_id user_info.id%type := '1';
v_name user_info.name%type;
v_pwd user_info.pwd%type;
begin
pro_getUserInfo(v_id, v_name, v_pwd);
dbms_output.put_line('name: ' || v_name || ' pwd: ' || v_pwd);
end;
-- 打印九九乘法表
create or replace procedure pro_multiplication_table
is
i integer;
j integer;
begin
for i in 1..9 loop
for j in 1..9 loop
if i>=j then
DBMS_output.put(To_Char(j)||'*'||to_char(i)||'='||to_char(i*j)||' ');
end if;
end loop;
DBMS_output.put_line('');
end loop;
end pro_multiplication_table;
--调用
call pro_multiplication_table();
--使用自定义游标、根据工作and薪水查询员工姓名
create or replace procedure pro_getName(
n_sal emp.sal%type,
n_ename out emp.ename%type,
n_job in out emp.job%type
)
is
n_count number;
cursor cur is select ename from emp where emp.sal > n_sal and emp.job=n_job;
n_row cur%rowtype;
begin
select count(*) into n_count from emp where emp.sal > n_sal and emp.job=n_job;
if n_count > 1 then
for n_row in cur loop
DBMS_output.put_line('职工姓名为:'||n_row.ename||' 工作为:'||n_job);
end loop;
else
DBMS_output.put_line('未查到符合条件的记录！');
end if;
end pro_getName;
-- 调用
declare
v_sal emp.sal%type := 2000;
v_job emp.job%type :='MANAGER';
v_ename emp.ename%type;
begin
pro_getName(v_sal, v_ename, v_job);
end;
--ref cursor的使用
--创建存放弱引用和强引用的cursor的包
create or replace package refcursor_pkg
as
type weak_ref_cursor is ref cursor;
type strong_ref_cursor is ref cursor return emp%rowtype;
end refcursor_pkg;
--将弱引用的cursor作为结果返回
create or replace procedure test(
p_deptno in number,
p_cursor out refcursor_pkg.weak_ref_cursor
)
is begin
open p_cursor for select * from emp where deptno=p_deptno;
end test;
/**或者不用包直接使用下面这种定义
create or replace procedure test_1(
p_deptno IN number,
p_cursor OUT SYS_REFCURSOR
)
is
begin
open p_cursor FOR select *from emp where deptno = p_deptno;
end test_1;
*/
declare
v_deptno number := 20;
v_cursor refcursor_pkg.weak_ref_cursor;
r_emp emp%rowtype;
begin
test(v_deptno, v_cursor);
loop
fetch v_cursor into r_emp;
exit when v_cursor%notfound;
dbms_output.put_line('empno: ' || r_emp.empno || ' ename: ' || r_emp.ename || ' job: ' || r_emp.job);
end loop;
close v_cursor;
end;
/**
//java中使用ref cursor
public void method() throws SQLException{
Connection conn = getConnection();
CallableStatement cstmt = null;
ResultSet rs = null;
int deptno = 10;
Object temp;
try{
cstmt = conn.prepareCall("begin test( , ); end;");
cstmt.setInt(1, deptno);
cstmt.registerOutParameter(2,
OracleTypes.CURSOR);
cstmt.execute();
rs = (ResultSet) cstmt.getObject(2);
ResultSetMetaData rsm = rs.getMetaData();
int columnCount = rsm.getColumnCount();
while (rs.next()){
for (int j=0;j< columnCount;j++){
temp = rs.getObject(j+1);
}
}
} finally {
if (!rs==null){
rs.close();
}
if (!stmt==null){
stmt.close();
}
if (!conn==null){
conn.close();
}
}
}
*/