「WGCLOUD」server启动错误信息：Table 'wgcloud.SYSTEM_INFO' doesn't exist

WGCLOUD监控系统的server启动时候，日志打印出现错误

2022-06-16 09:44:39.516 [taskScheduler-2] ERROR com.wgcloud.task.ScheduledTask - 检测license任务错误
org.springframework.jdbc.BadSqlGrammarException: 
### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: Table 'wgcloud.SYSTEM_INFO' doesn't exist
### The error may exist in class path resource [mybatis/mapper/SystemInfoMapper.xml]
### The error may involve com.wgcloud.mapper.SystemInfoMapper.countByParams-Inline
### The error occurred while setting parameters
### SQL: SELECT count(*)  FROM SYSTEM_INFO t
### Cause: java.sql.SQLSyntaxErrorException: Table 'wgcloud.SYSTEM_INFO' doesn't exist
; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Table 'wgcloud.SYSTEM_INFO' doesn't exist
    at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:239)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:70)
    at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:91)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:441)
    at com.sun.proxy.$Proxy62.selectOne(Unknown Source)
    at org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160)
    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87)
    at org.apache.ibatis.binding.MapperProxy$PlainMethodInvoker.invoke(MapperProxy.java:152)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:85)
    at com.sun.proxy.$Proxy79.countByParams(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:215)
    at com.sun.proxy.$Proxy80.countByParams(Unknown Source)
    at com.wgcloud.service.SystemInfoService.countByParams(SystemInfoService.java:97)
    at com.wgcloud.service.SystemInfoService$$FastClassBySpringCGLIB$$71218ce9.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
    at com.wgcloud.service.SystemInfoService$$EnhancerBySpringCGLIB$$97352e58.countByParams(<generated>)
    at com.wgcloud.task.ScheduledTask.validateLicense(ScheduledTask.java:90)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

原因：

1、这个错误是wgcloud数据库中没有创建表，也就是我们没有导入sql脚本来初始化数据库，sql脚本在安装包里，如下图所示，我们导入对应的sql就可以了，一个是mysql的初始化脚本，一个是postgresql的初始化脚本

2、还有一种可能是Linux安装的mysql，大小写敏感问题导致的问题
我们通过修改my.cnf文件的参数来达到大小写不敏感

vi /etc/my.cnf
# 在[mysqld]加入下面参数
lower_case_table_names=1

然后保存退出，重启服务

systemctl restart mysqld

这个时候就已经设置好表名称大小写不敏感了