Pluggable: Building database function ecology . . . . . . . . . . . . . . . . . . . . . . . 5 2.3.1 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3.2 L2 Feature Layer 9.4.1 SQL Error Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460 Kernel Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 460 Feature Exception Open Ecosystem It can provide users with flexibility thanks to custom systems based on multi‐level (kernel, feature, and ecosystem) plugin capabilities. 1.3. Advantages 3 2 Design Philosophy ShardingSphere

Pluggable: Building database function ecology . . . . . . . . . . . . . . . . . . . . . . . 5 2.3.1 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3.2 L2 Feature Layer 9.4.1 SQL Error Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429 Kernel Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429 Feature Exception Open Ecosystem It can provide users with flexibility thanks to custom systems based on multi‐level (kernel, feature, and ecosystem) plugin capabilities. 1.3. Advantages 3 2 Design Philosophy ShardingSphere

4 1.2.3 Pluggable: Building database function ecology . . . . . . . . . . . . . . . . . . 4 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 L2 Feature Layer 4.4.1 SQL Error Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 Kernel Exception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 Feature Exception Implementation classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 5.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327 5

3.4.4 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L2 Feature Layer 6.2.3 ShardingSphereYamlConstruct . . . . . . . . . . . . . . . . . . . . . . . . . . . 222 6.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223 6 and access limitation and an‐ alyze, QoS and observability). • Pluggable: Leveraging the micro kernel and 3 layers pluggable mode, features and database ecosystem can be embedded flexibily. Developers

5 1.2.3 Pluggable: Building database function ecology . . . . . . . . . . . . . . . . . . 6 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 L2 Feature Layer Implementation classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 5.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 5 distributed database system. The project includes a JDBC and a Proxy, and its core adopts a micro‐ kernel and pluggable architecture. Thanks to its plugin‐oriented architecture, features can be flexibly

3.4.4 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L2 Feature Layer 6.2.3 ShardingSphereYamlConstruct . . . . . . . . . . . . . . . . . . . . . . . . . . . 226 6.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 6 and access limitation and an‐ alyze, QoS and observability). • Pluggable: Leveraging the micro kernel and 3 layers pluggable mode, features and database ecosystem can be embedded flexibily. Developers

3.4.4 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L1 Kernel Layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L2 Feature Layer 6.2.3 ShardingSphereYamlConstruct . . . . . . . . . . . . . . . . . . . . . . . . . . . 238 6.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239 6 and access limitation and an‐ alyze, QoS and observability). • Pluggable: Leveraging the micro kernel and 3 layers pluggable mode, features and database ecosystem can be embedded flexibily. Developers

org/document/current/cn/user-manual/shardingsphere-proxy/ yaml-config/)。 8. 启动 ShardingSphere‐Proxy Linux/macOS 操作系统请运行 bin/start.sh，Windows 操作系统请运行 bin/start.bat 启动 ShardingSphere‐Proxy。默认监听端口 3307，默认配置目录为 volumes: - ./custom/conf:/opt/shardingsphere-proxy-native/conf ports: - "3307:3307" • 本节假定处于 Linux（amd64，aarch64），MacOS（amd64，aarch64/M1）或 Windows（amd64） 环境。 • 本节依然受到 ShardingSphere JDBC 一侧的 GraalVM com/idea/2022/06/intellij ‐idea‐2022‐2‐eap‐5/#Experimental_GraalVM_Native_Debugger_for_Java 及其后继。如果你使用的不 是 Linux，则无法对 GraalVM Native Image 进行 Debug，请关注尚未关闭的 https://github.com/oracle/ graal/issues/5648 。 对于使用

Sharding Route . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.1.5 Guide to Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 SQL Parsing . . . . . 5.2.3 ShardingSphereYamlConstruct . . . . . . . . . . . . . . . . . . . . . . . . . . . 282 5.3 Kernel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282 5 designated node. 3.1. Sharding 21 Apache ShardingSphere document, v5.0.0-beta 3.1.5 Guide to Kernel The major sharding processes of all the three ShardingSphere products are identical. The core consists

org/document/current/cn/user-manual/shardingsphere-proxy/ yaml-config/)。 8. 启动 ShardingSphere‐Proxy Linux/macOS 操作系统请运行 bin/start.sh，Windows 操作系统请运行 bin/start.bat 启动 ShardingSphere‐Proxy。默认监听端口 3307，默认配置目录为 volumes: - ./custom/conf:/opt/shardingsphere-proxy-native/conf ports: - "3307:3307" • 本节假定处于 Linux（amd64，aarch64），MacOS（amd64）或 Windows（amd64）环境。如果你位于 MacOS（aarch64/M1）环境，你需要关注尚未关闭的 https://github /idea/2022/06/intellij‐idea‐2022‐2‐eap‐5/#Experimental_GraalVM_Native_Debugger_for_Java 及 其后继。如果你使用的不是 Linux，则无法对 GraalVM Native Image 进行 Debug，请关注尚未关闭 的 https://github.com/oracle/graal/issues/5648 。 • 对于使用