Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 Impact on the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 Limitations . . . . . . . Introduction Apache ShardingSphere is an ecosystem to transform any database into a distributed database system, and enhance it with sharding, elastic scaling, encryption features & more. The project is committed flexibly build application systems for various scenarios, allowing architects to freely adjust the system architecture according to the current businesses. 3.3. Hybrid Architecture 9 Apache ShardingSphere

Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184 Impact on the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 Limitations . . . . . . . Introduction Apache ShardingSphere is an ecosystem to transform any database into a distributed database system, and enhance it with sharding, elastic scaling, encryption features & more. The project is committed flexibly build application systems for various scenarios, allowing architects to freely adjust the system architecture according to the current businesses. 3.3. Hybrid Architecture 9 Apache ShardingSphere

ShardingSphereDriver 的驱动类，通过实现 org. apache.shardingsphere.infra.url.ShardingSphereURLLoader 的 SPI，可允许从多种来源 和 File System 获取并解析为 ShardingSphere 的 YAML 配置文件。如无特定声明，以下实现均采 用 YAML 1.1 作为 YAML 的编写规范，这并不阻止 org.apache.shardingsphere .yaml?placeholder-type=environment • jdbc:shardingsphere:classpath:config.yaml?placeholder-type=system_props 从绝对路径中加载配置文件 配置文件为 xxx.yaml，当 placeholder-type 为 none 或不标明时，配置文件格式与 YAML 配置 一致。当 placeholder-type placeholder-type=environment • jdbc:shardingsphere:absolutepath:/path/to/config.yaml? placeholder-type=system_props JDBC URL 参数 对于 org.apache.shardingsphere.infra.url.ShardingSphereURLLoader 的实现，并非所有 的 JDBC

SQLStatementVisitorEngine("MySQL", false); MySQLStatement sqlStatement = visitorEngine.visit(parseASTNode); System.out.println(sqlStatement.toString()); 相关参考 • YAML 配置：SQL 解析 SQL 翻译 配置入口 类名称：org.apache.shardingsphere nativeTest。如有需要，请使用 org.junit.jupiter.api.condition.DisabledInNativeImage 注解或 org.graalvm.nativeimage.imagecode 的 System Property 屏蔽部分单元测试在 GraalVM Native Image 下运行。 ShardingSphere 定义了 generateMetadata 的 Maven Profile See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License");

SQLStatementVisitorEngine("MySQL", false); MySQLStatement sqlStatement = visitorEngine.visit(parseASTNode); System.out.println(sqlStatement.toString()); 相关参考 • YAML 配置：SQL 解析 SQL 翻译 配置入口 类名称：org.apache.shardingsphere See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); proxy_property_name 为 PROXY 的属性配置，需使用下划线命名 • agent_plugins_enabled 为 agent 插件的启用状态，默认值 FALSE • system_log_level 为系统日志等级，仅影响 PROXY 的日志打印，默认值 INFO 示例 • 设置 Proxy 属性配置 SET DIST VARIABLE sql_show = true;

Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Impact on the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195 Limitations . . . . . . . is an open source ecosystem that allows you to transform any database into a distributed database system. The project includes a JDBC and a Proxy, and its core adopts a micro‐ kernel and pluggable architecture isolation support for complex testing work. The obtained testing result can accurately reflect the system’s true capacity and performance. 1.1. What is ShardingSphere 2 Apache ShardingSphere document,

Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 Impact on the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 Limitations . . . . . . . Introduction Apache ShardingSphere is an ecosystem to transform any database into a distributed database system, and enhance it with sharding, elastic scaling, encryption features & more. The project is committed flexibly build application systems for various scenarios, allowing architects to freely adjust the system architecture according to the current businesses. 1.3. Deployment 7 Apache ShardingSphere document

"STATEMENT", false, new Properties()); MySQLStatement sqlStatement = visitorEngine.visit(parseASTNode); System.out.println(sqlStatement.toString()); 相关参考 • YAML 配置：SQL 解析 • Spring Boot Starter：SQL 解析 • Spring See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); uginBootService Sys temDate‐ time 从应用系统时间中获取 当前时间进行路由 org .apache.shardin gsphere.datetim e.system.System DatetimeService 5.8 读写分离 5.8.1 ReadQueryLoadBalanceAlgorithm 全限定类名 org.apache.shardingsphere

//Insert student data session.insert("Student.insert", student); System.out.println("record inserted successfully"); session.commit(); session.close(); System.out.println(st.getId()); System.out.println(st.getName()); System.out.println(st.getBranch()); System.out.println(st.getPercentage()); System.out out.println(st.getEmail()); System.out.println(st.getPhone()); } System.out.println("Records Read Successfully "); session.commit(); session.close();

The applications and databases that use Database Mesh to visit databases will form a large grid system, where they just need to be put into the right positions accordingly. They are all governed by the registry center, ShardingSphere can build an application system that is applicable to all kinds of scenarios. Ar‐ chitects can adjust the system architecture to the most applicable one to their needs to registry center, ShardingSphere can build an application system that is applicable to all kinds of scenarios. Ar‐ chitects can adjust the system architecture to the most applicable one to their needs to