mariadb

【构建之法教学项目】一个简单的基于C#的电子商务系统演练场景的代码示例

為{幸葍}努か 提交于 2021-02-08 13:41:32
电子商务平台,是一个历史悠久而又充满挑战的行业,他和社交一起成为中国互联网市场的两极。电子商务系统是一个非常复杂的系统,他实现了人与物、人与人的链接,同时也需要大量的技术来支撑,实现系统的高可用。这些技术包括DevOPS、容器技术、领域驱动设计、物联网、微服务、全文检索等。电商涉及的技术体系非常庞大,对开发者来说是一个充满挑战的宝库,可以说电商业务的技术学习可以贯穿职业生涯的非常漫长的时间。不过在此之前,我们先实现一个最简单的理想模型 ,只考虑最简单的实现模式,下面这个项目是从一个典型的电商项目中,抽出的一些典型场景。 这个项目目前采用C#进行构建,其主要目的是搭建一个极简的电商平台的demo。在这个简单的电子商务系统中,采用目前不少企业使用的比较传统的软件管理方式,以ER图设计为主然后再从数据库出发设计业务的传统模式,而不是按照UML的方式进行软件设计再进行软件功能开发。在本项目中,设计了顾客、商家、商品、订单四个简单的表结构, 1、顾客:负责下单,购买商品。 2、商家:负责对商品信息和价格信息进行维护。 3、商品:商品的描述信息。 4、订单:顾客下单记录为订单。 本项目主要实现了以下功能: 1、商家:可以进行商品信息的维护。 2、顾客:可选择下单的商品=》建立订单,以及查询订单。 项目的代码地址为:https://github.com/buildyoucode

Request on key/value in a JSON type field with Doctrine2

耗尽温柔 提交于 2021-02-08 13:18:18
问题 I'm trying to figure out how, in a symfony 3.4 app, to retrieve (through a repository method, with a DQL request for example) entities depending on a value for a specific key in a "json" typed column. Saw there's some stuff possible with postgre but I didnt find anything with mariaDB Let's say I get an entity Letter with this property : /** * * @ORM\Column(type="json") */ private $metadatas; which contains, for example: { "key1": "value", "key2": "value" } How can I, or, Is it possible to

Loops and traps in database design

僤鯓⒐⒋嵵緔 提交于 2021-02-08 10:48:30
问题 I have started working on designing a database in MariaDB in a company. This is first time I am working on it. ( Previously I used to work for Business Objects in Datawarehousing ) However I have created the tables and have joined them as per requirements. I encounter loops, chasm traps and fan traps in the layout which I have created. Do I need to resolve them before working on the database ?? All the search I am doing in the internet about these problems fetches results which are about

Loops and traps in database design

半腔热情 提交于 2021-02-08 10:47:24
问题 I have started working on designing a database in MariaDB in a company. This is first time I am working on it. ( Previously I used to work for Business Objects in Datawarehousing ) However I have created the tables and have joined them as per requirements. I encounter loops, chasm traps and fan traps in the layout which I have created. Do I need to resolve them before working on the database ?? All the search I am doing in the internet about these problems fetches results which are about

GSSAPI-Auth with PHP to MariaDB (Windows)

ぃ、小莉子 提交于 2021-02-08 10:36:19
问题 I'm currently working on Single Sign On to a Database-Server in a clean Windows Domain Environment. And as MySQL Enterprise and MSSQL servers are currently no option, it came down to MariaDB with the GSSAPI plugin. That's what I currently have: Server: Windows 7 x64 member of MYDOMAIN MariaDB 10.2.14 x64 Apache2 2.4.33 x64 VC11 + mod_authnz_sspi + PHP 5.6.35 + mod_fcgid MariaDB ODBC Driver x64 HeidiSQL (SQL-Client delivered with the MariaDB installer) FCGID-Config looks as follows ("A:" is

GSSAPI-Auth with PHP to MariaDB (Windows)

巧了我就是萌 提交于 2021-02-08 10:33:38
问题 I'm currently working on Single Sign On to a Database-Server in a clean Windows Domain Environment. And as MySQL Enterprise and MSSQL servers are currently no option, it came down to MariaDB with the GSSAPI plugin. That's what I currently have: Server: Windows 7 x64 member of MYDOMAIN MariaDB 10.2.14 x64 Apache2 2.4.33 x64 VC11 + mod_authnz_sspi + PHP 5.6.35 + mod_fcgid MariaDB ODBC Driver x64 HeidiSQL (SQL-Client delivered with the MariaDB installer) FCGID-Config looks as follows ("A:" is

DB connections increase after setting aurora in MariaDB connector

一曲冷凌霜 提交于 2021-02-08 06:49:01
问题 We're testing the failover behaviour using the MariaDB JDBC connector Aurora specific features. We've set the JDBC URL as the documentation suggest: jdbc:mysql:aurora://cluster.cluster-xxxx.us-east-1.rds.amazonaws.com/db The problem is that as soon as we add the aurora: part in the URL schema, we can see an increase in the connections to the database writer until the point that we've to rollback the change (it even reaches 3.000 connections). Versions: MariaDB connector: 2.0.1 HikariCP

DB connections increase after setting aurora in MariaDB connector

混江龙づ霸主 提交于 2021-02-08 06:48:03
问题 We're testing the failover behaviour using the MariaDB JDBC connector Aurora specific features. We've set the JDBC URL as the documentation suggest: jdbc:mysql:aurora://cluster.cluster-xxxx.us-east-1.rds.amazonaws.com/db The problem is that as soon as we add the aurora: part in the URL schema, we can see an increase in the connections to the database writer until the point that we've to rollback the change (it even reaches 3.000 connections). Versions: MariaDB connector: 2.0.1 HikariCP

Mariadb connection client: Access denied for user (using password: NO) on mysql 8.0

微笑、不失礼 提交于 2021-02-07 20:40:07
问题 mariadb-java-client throws access denied on mysql 8.0, but works on mysql 5.6 So I wonder if mariadb client is compatible with mysql 8.0 in mysql, test users are set limit to hosts machine = % even tested on mysql 8.0's machine, same access denied error. Caused by: java.sql.SQLException: Access denied for user 'user1'@'192.168.238.1' (using password: NO) Current charset is UTF-8. If password has been set using other charset, consider using option 'passwordCharacterEncoding' Connection

CentOS 7.2 yum方式安装MySQL 5.7

佐手、 提交于 2021-02-07 06:38:19
CentOS 7之后的版本yum的默认源中使用MariaDB替代原先MySQL,因此安装方式较为以往有一些改变: 下载mysql的源 wget http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm 安装yum库 yum localinstall -y mysql57-community-release-el7-7.noarch.rpm 安装MySQL yum install -y mysql-community-server 启动MySQL服务 systemctl start mysqld.service MySQL5.7加强了root用户的安全性,因此在第一次安装后会初始化一个随机密码,以下为查看初始随机密码的方式(此命令只能用于查询初始密码) grep 'temporary password' /var/log/mysqld.log 结果如下: 使用初始随机密码登录后MySQL会强制要求修改密码,否则无法正常使用,(密码必须包含小写、大写字母及特殊字符,当然也有其他方法不受此限制,再次不多做描述),修改方法如下: SET PASSWORD = PASSWORD('your new password'); ALTER USER 'root'@'localhost' PASSWORD EXPIRE