1、记录数据库配置的出现问题

解决MySql查询语句报Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre异常的问题

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今天上午在公司启动项目的时候,获取一个列表的时候项目报错,内容如下:

</article>
 
  1. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression # 1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'kypj-gate.t1.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
  2. ; bad SQL grammar []; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression # 1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'kypj-gate.t1.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by
  3. at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java: 91)
  4. at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java: 73)
  5. at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java: 81)
  6. at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java: 74)
  7. at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java: 399)
  8. at com.sun.proxy.$Proxy35.selectList(Unknown Source)
  9. at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java: 205)
  10. at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java: 119)
  11. at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java: 63)
  12. at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java: 52)
  13. at com.sun.proxy.$Proxy43.findProxyList(Unknown Source)
  14. at com.kypj.jeeplat.modules.platmgt.player.service.PlatPlayerService.findProxyListPage(PlatPlayerService.java: 2268)

明明是相同的项目在同事的电脑上就没问题,在网上查了一下原来是MySql版本的问题,我的MySql数据库版本是5.7.23,在5.7以上的版本实现了对功能依赖的检测,MySql默认启用了only_full_group_by SQL模式,可以试试在Navicat里面输入查询语句

select @@global.sql_mode;
 

得到的结果如下,

ONLY_FULL_GROUP_BY,sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
 

照理说只要将结果中的ONLY_FULL_GROUP_BY去掉就可以,试着在Navicat里执行

set @@global.sql_mode = 'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';
 

重启MySql服务,再进入Navicat执行select @@global.sql_mode发现刚才的set语句并没有生效,

进入MySql安装路径下,打开my.ini文件,在文件的最末尾加上

sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION

这样一句,再重启MySql服务,发现Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggre异常的问题已经解决

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