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Are nested transactions allowed in MySQL?
...noDB supports SAVEPOINTS.
You can do the following:
CREATE TABLE t_test (id INT NOT NULL PRIMARY KEY) ENGINE=InnoDB;
START TRANSACTION;
INSERT
INTO t_test
VALUES (1);
SELECT *
FROM t_test;
id
---
1
SAVEPOINT tran2;
INSERT
INTO t_test
VALUES (2);
SELECT *
FROM t_test;
id...
Adding attribute in jQuery
...
You can add attributes using attr like so:
$('#someid').attr('name', 'value');
However, for DOM properties like checked, disabled and readonly, the proper way to do this (as of JQuery 1.6) is to use prop.
$('#someid').prop('disabled', true);
...
Disable password authentication for SSH [closed]
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Many guides suggest changing ChallengeResponseAuthentication, PasswordAuthentication, UsePAM from yes to no on server. Successfully tested under Debian/Ubuntu.
– anon
Apr 13 '18 at 10:29
...
c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...均提供实例参考。窗口应用程序使用Timer:
#define TIMER_ID 1000 //定时器ID,可任意。触发后回调函数中用于区别不同的定时器以执行不同的任务
SetTimer(TIMER_ID, 1000 , NULL); //启动定时器,1秒后触发
KillTimer(TIMER_ID); //取消定时器
...
passing xxx as \'this\' argument of xxx discards qualifiers - C/C++ - 清泛网 - 专注C/C++及内核技术
...lude <set>
using namespace std;
class StudentT {
public:
int id;
string name;
public:
StudentT(int _id, string _name) : id(_id), name(_name) {
}
int getId() { // 应该声明为const成员
return id;
}
string getName() { // 应该声明为con...
解决:ORA-00054:资源正忙,要求指定NOWAIT - 数据库(内核) - 清泛网 - 专注...
...出所有被锁的对象,定位出哪个回话占用
select l.session_id,o.owner,o.object_name from v$locked_object l,dba_objects o where l.object_id=o.object_id
结果:
session_id owner object_name
158 SA TEST_1
...
对比想要创建的索引,定位哪些会话需要被删除
2:...
SSH免密码登陆教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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2、ssh-keygen -t [rsa|dsa],将会生成密钥文件和私钥文件 id_rsa,id_rsa.pub或id_dsa,id_dsa.pub
3、将 .pub 文件复制到B机器的 .ssh 目录, 并 cat id_dsa.pub >> ~/.ssh/authorized_keys
4、大功告成,从A机器登录B机器的目标账户,不再需要密码了
ssh-k...
Phpcms v9 实现首页|列表页|内容页点击量调用的代码 - 更多技术 - 清泛网 -...
...容页的点击量获取比较简单,一般默认模板中自带:<span id="hits">< span>...<script language="JavaScript" src="{APP_PATH}api.p...1、内容页的点击量获取比较简单,一般默认模板中自带:
<span id="hits"></span>
...
<script language="JavaScript" src="{APP_...
js + css 实现Div弹出效果 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...splay: none;
position: absolute;
top: 20%;
left: 22%;
width: 55%;
height: 60%;
padding: 20px;
border: 1px solid #004F8C;
background-color: white;
z-index:1002;
overflow: auto;
}
</style>
<a href="javascript:void(0)" onclick="showDiv('conte...
为iFrame添加动态载入效果,提高用户体验 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...加载中:完成后:以下是完整代码:<div style="float: left;width: 205px;font-size: 13px !important;line-hei iFrame动态载入效果,现在记录一下,顺便分享。
先展示下效果:
加载中:
完成后:
以下是完整代码:
<div style="float: left;width...