使用oracle的javaJVM,trigger
create or replace java source named FirstClass as
public class FirstClass{
public static String greeting(String name){
return "Hello " + name + "!";
}
}
/
create or replace function firstclass_greeting (name varchar2) return varchar as
language java name 'FirstClass.greeting(java.lang.String) return java.lang.String';
/
SQL> select firstclass_greeting('Bruce') from dual;
FIRSTCLASS_GREETING('BRUCE')
--------------------------------------------------------------------------------
Hello Bruce!
========================================
Listing 4. The Source Code for create_bookstore_tables.sql
drop table books
/
drop table publisher_supply_orders
/
create table books(
book_id number primary key,
publisher_id number,
page_count number,
author_name varchar2(50),
book_title varchar2(50),
description varchar2(500),
status varchar2(10),
inventory_qty number
)
/
insert into books values(100, 200, 234, 'Bruce Hopkins', 'Bluetooth for Java', 'great book', 'IN STOCK', 10);
insert into books values(101, 200, 401, 'Sam Jones', 'Living on the East Coast', 'worth every penny', 'IN STOCK', 50);
insert into books values(102, 250, 278, 'Max Jason', 'The South of France', 'a best-seller', 'IN STOCK', 20);
create table publisher_supply_orders(
book_id number,
publisher_id number,
order_quantity number
)
/
=================
create or replace java source named "ReorderTrigger" as
import java.sql.*;
import oracle.jdbc.driver.*;
public class ReorderTrigger {
public static int REORDER_THRESHOLD = 5;
public static int REORDER_QTY = 25;
public static void reorderBooks(Integer bookID, Integer publi
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需要大量oracle测试数据时,可以使用以下方法。
DECLARE
i INT;
BEGIN
i := 0;
WHILE(i < 100000)
LOOP
i := i + 1;
INSERT INTO TEST_TABLE(ID, XM) VALUES(i, '姓名' || i);
END LOOP;
COMMIT;
END; ......
--查出所有被锁住的表
select b.owner TABLEOWNER, b.object_name TABLENAME, c.OSUSER LOCKBY, c.USERNAME LOGINID, c.sid SID, c.SERIAL# SERIAL
from v$locked_object a,dba_objects b, v$session c
where b.object_id = a.object_id AND a.SESSION_ID =c.sid;
--通过SID, SERIAL解锁
--alter system kill sessio ......
成员函数和过程
构造函数方法
-oracle的每个对象均有一个内置的构造函数方法
-用于创建对象的一个实例
-无需显式地定义
-与对象类型同名
定义对象类型
create or replace
type persontype as object
(
id int,
name varchar(20),
member function ......