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java-mysql-explain

Auto execute mysql explain when execute sql in java project. Install via the VSCode Marketplace or see Installation Instructions.

Features

  • Auto print original mysql sql log.
  • Auto execute mysql explain when execute sql.
  • Support jdk8+, mysql-connector 5,6,8.
  • User-friendly, no intrusion into business services.

  • 自动打印 mysql 语句日志
  • 自动查看 mysql 执行计划
  • 支持 jdk8+，支持 mysql-connector 5、6、8
  • 使用友好，对业务服务无侵入

Usage

Open the launch.json file, add a java startup item if not exists, then right-click the item Generate Mysql Explain vmArgs to generate neccessary vmargs for current java project. After this, you can startup your app that works with executing mysql explain automatically.

打开 launch.json 文件，添加 Java 启动项后右键点击 生成 Mysql Explain 启动参数 生成所需的 Java 启动参数。然后启动项目，观察日志中自动执行 Explain 后的输出。

App startup log with -Ddebug:

[mysql-explain] load parameter [mysql.showSQL] from jvm parameter: true
[mysql-explain] load parameter [mysql.explain.filter] from jvm parameter: INSERT,UPDATE,DELETE
[mysql-explain] load parameter [mysql.explain.types] from jvm parameter: ALL
[mysql-explain] load parameter [mysql.explain.extras] from jvm parameter: Using filesort,Using temporary
[mysql-explain] configurations:
+---+---------------------------+----------------------+--------------------------------+--------------------------------+------------------------------------------------------------------+
| # | config item               | config key           | current value                  | default value                  | remark                                                           |
+---+---------------------------+----------------------+--------------------------------+--------------------------------+------------------------------------------------------------------+
| 1 | Print SQL                 | mysql.showSQL        | true                           | false                          | true/false                                                       |
| 2 | Filter out before print   | mysql.showSQL.filter |                                |                                | Example: QRTZ_,COUNT(0)                                          |
| 3 | Filter out before explain | mysql.explain.filter | INSERT,UPDATE,DELETE           |                                | Example: INSERT,UPDATE,DELETE                                    |
| 4 | Filter by explain [type]  | mysql.explain.types  | ALL                            | ALL                            | system,const,eq_ref,ref,range,index,ALL                          |
| 5 | Filter by explain [Extra] | mysql.explain.extras | Using filesort,Using temporary | Using filesort,Using temporary | Using filesort,Using temporary,Using where,Using index condition |
+---+---------------------------+----------------------+--------------------------------+--------------------------------+------------------------------------------------------------------+

Extension Settings

Extension settings

Requirements

VSCode 1.85.0 or newer

Development

Compile before debugging. Debug (F5) while editing extension.ts to spawn a VSCode debug instance.