getMapper(BlogMapper.class); Blog blog = mapper.selectBlog(101); 第二种方法有很多优势，首先它不是基于字符串常量的，就会更安全；其次，如果你的 IDE 有代码补全功能，那么你可以在有了已映射 SQL 语句的基础之上利用这个功能。 PDFmyURL - the best online web to pdf conversion service 提示 some_table t1 Your visitors can save your web pages as PDF in one click with http://pdfmyurl.com! cross join some_table t2 Property value can be also used in include refid attribute or property Resources 工具类,这个类在 org.mybatis.io 包中。Resources 类正 如其名,会帮助你从类路径下,文件系统或一 个 web URL 加载资源文件。看一下这个类的 源代码或者通过你的 IDE 来查看,就会看到一整套有用的方法。这里给出一个简表: URL getResourceURL(String resource) URL getResourceURL(ClassLoader loader

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The name changes, or incorrect handling of operations such as paging, sorting, and aggregate grouping. Cross‐library transactions are also tricky for a distributed database cluster. Reasonable use of table database can effectively avoid the trouble caused by distributed transactions. In scenarios where cross‐library transactions cannot be avoided, some businesses might still be in the need to maintain transaction

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The name changes, or incorrect handling of operations such as paging, sorting, and aggregate grouping. Cross‐library transactions are also tricky for a distributed database cluster. Reasonable use of table database can effectively avoid the trouble caused by distributed transactions. In scenarios where cross‐library transactions cannot be avoided, some businesses might still be in the need to maintain transaction

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The name changes, or incorrect handling of operations such as paging, sorting, and aggregate grouping. Cross‐library transactions are also tricky for a distributed database cluster. Reasonable use of table database can effectively avoid the trouble caused by distributed transactions. In scenarios where cross‐library transactions cannot be avoided, some businesses might still be in the need to maintain transaction

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The name changes, or incorrect handling of operations such as paging, sorting, and aggregate grouping. Cross‐library transactions are also tricky for a distributed database cluster. Reasonable use of table database can effectively avoid the trouble caused by distributed transactions. In scenarios where cross‐library transactions cannot be avoided, some businesses might still be in the need to maintain transaction

databases=MySQL 远程 debug Docker 容器中的 Proxy 代码 IT 测试的 Proxy 镜像默认开启了 3308 端口用于远程调试容器中的实例。 使用 IDEA 等 IDE 工具可以通过如下方式连接并 debug 容器中的 Proxy 代码： IDEA ‐> Run ‐> Edit Configurations ‐> Add New Configuration ‐> username=root scaling.it.native.mysql.password=root scaling.it.native.mysql.port=3306 找到对应的用例，在 IDE 下使用 Junit 的方式启动即可。 Docker 环境启动 第一步：打包镜像 ./mvnw -B clean install -am -pl shardingsphere-test/sha ing/pom.xml -Dscaling.it.env.type=DOCKER - Dscaling.it.docker.mysql.version=${image-name} 也可以使用 IDE 的方式运行用例。it-env.properties 可以配置如下： scaling.it.env.type=DOCKER scaling.it.docker.mysql.version=mysql:5

ShardingSphere document 远程调试通过镜像启动的 Proxy E2E 测试的 Proxy 镜像默认开启了 3308 端口用于远程调试容器中的实例。 使用 IDEA 等 IDE 工具可以通过如下方式连接并 debug 容器中的 Proxy 代码： IDEA ‐> Run ‐> Edit Configurations ‐> Add New Configuration ‐> ShardingSphere‐Proxy（使用 3307 端口）：参考 proxy 启动手册，或者修改 proxy/ bootstrap/src/main/resources/conf/server.yaml 之后在 IDE 运行 org.apache. shardingsphere.proxy.Bootstrap。 Proxy 配 置 可 以 参 考：‐ test/e2e/operation/pipeline/s username=root pipeline.it.native.mysql.password=root pipeline.it.native.mysql.port=3306 4. 找到对应的测试类，在 IDE 启动运行。 DOCKER 环境启动 参考 .github/workflows/e2e-pipeline.yml。 1. 打包镜像 ./mvnw -B clean install -am -pl

debug Docker 容器中的 Proxy 代码 远程调试通过镜像启动的 Proxy E2E 测试的 Proxy 镜像默认开启了 3308 端口用于远程调试容器中的实例。 使用 IDEA 等 IDE 工具可以通过如下方式连接并 debug 容器中的 Proxy 代码： IDEA ‐> Run ‐> Edit Configurations ‐> Add New Configuration ‐> ShardingSphere‐Proxy（使用 3307 端口）：参考 proxy 启动手册，或者修改 proxy/ bootstrap/src/main/resources/conf/server.yaml 之后在 IDE 运行 org.apache. shardingsphere.proxy.Bootstrap。 Proxy 配 置 可 以 参 考：‐ test/e2e/operation/pipeline/s username=root pipeline.it.native.mysql.password=root pipeline.it.native.mysql.port=3306 4. 找到对应的测试类，在 IDE 启动运行。 DOCKER 环境启动 参考 .github/workflows/e2e-pipeline.yml。 1. 打包镜像 ./mvnw -B clean install -am -pl

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The group by are just the case in point. 3.1. Sharding 10 Apache ShardingSphere document, v5.0.0-beta Cross‐database transaction is also a tricky thing that distributed databases need to deal. Fair use of distributed transactions can be avoided by the wise use of different tables in the same database. When cross‐database transactions cannot be avoided, some businesses still need to keep transactions consistent

pressure, can provide possibilities to transfer distributed transactions to local transac‐ tions, since cross‐database upgrades are once involved, distributed transactions can turn pretty tricky sometimes. The aggregated group by are just the case in point. 4.3. Sharding 26 Apache ShardingSphere document, v5.1.1 Cross‐database transaction is also a tricky thing that distributed databases need to deal. Fair use of distributed transactions can be avoided by the wise use of different tables in the same database. When cross‐database transactions cannot be avoided, some businesses still need to keep transactions consistent