Re: [I] java.lang.UnsupportedOperationException: Cannot support database type 'MySQL' error [shardingsphere]

["HouYuSource (via GitHub)" <gi...@apache.org>]

HouYuSource commented on issue #7701:
URL: https://github.com/apache/shardingsphere/issues/7701#issuecomment-1878215315

   > @ted-w-20230331 hi!，can you tell you how did you solve it? I also encountered this kind of problem
   
   You can debug the SQLParserFactory static code,
   
   1. The result of executing this code varies among different threads, and static only executes once, so the first result must be correct;
   2. This code should not be executed by an asynchronous thread because the ClassLoader of the asynchronous thread is uncertain, which may cause SPI to obtain an empty implementation class;
   3. If it is a SpringBoot application, the current thread's ClassLoader should be 'org.springframework.boot.loader.LaunchedURLClassLoader' to properly initialize.
   
   ```
   public final class SQLParserFactory {
       
       static {
           NewInstanceServiceLoader.register(SQLParserConfiguration.class);
       }
      // ...
   }
   ```


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