java.sql.SQLException: Unknown system variable 'query_cache_size'

Jar包版本不对：

<dependency>
       <groupId>mysql</groupId>
       <artifactId>mysql-connector-java</artifactId>
       <version>5.1.40</version>
</dependency>

换个版本就好了：

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.11</version>
</dependency>

原文地址：https://www.cnblogs.com/jack-zhou21235/p/12191870.html

时间： 2024-08-29 20:18:19

java.sql.SQLException: Unknown system variable 'query_cache_size'的相关文章

Hibernate卡住，然后报错java.sql.SQLException: Unknown system variable 'language'异常

启动应用的时候会卡在: 08:22:58,221 DEBUG IntegratorServiceImpl:46 - Adding Integrator [org.hibernate.cfg.beanvalidation.BeanValidationIntegrator]. 08:22:58,226 DEBUG IntegratorServiceImpl:46 - Adding Integrator [org.hibernate.secure.spi.JaccIntegrator]. 08:22:

JDBC报错消息 Could not get JDBC Connection; nested exception is java.sql.SQLException: Unknown system variable 'tx_isolation'

今天用JDBCTemplate时,发现启动服务器之后报错: Could not get JDBC Connection; nested exception is java.sql.SQLException: Unknown system variable 'tx_isolation'. 网上说是因为MySQL版本过高的问题,我的MySQL版本是8.0,里面已经没有tx_isolation,变成了transaction_isolation,用了以下几种解决方法: (1)更改MySQL 无效,仍然

解决问题：java.sql.SQLException: Unknown system variable 'tx_isolation'

是因为MySQL版本高但驱动jar包的版本太低, 因此将mysql-connector-java升级到最新版本就解决了问题: <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.17</version></dependency> 但紧接着又发现报错: 在数据库连接配置文件

mysql 8.0 java连接报错：Unknown system variable 'query_cache_size'

java连接mysql 8.0.11报错 java.sql.SQLException: Unknown system variable 'query_cache_size' at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:545) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513) at co

Unknown system variable 'query_cache_size' 错误原因以及解决办法

Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Unknown system variable

java.sql.SQLException: Unknown type '246 in column 0 of 1 in binary-encoded result set的解决办法

最近在大学毕设项目基础上新增一些功能,基于Struts2开源框架,数据库采用的是MySQL.写完后台的新功能代码,单元测试也顺利通过,去整合前台,但是当使用JSP页面操作的时候,没想到报异常了.截图如下: java.sql.SQLException: Unknown type '246 in column 2 of 4 in binary-encoded result set. 纳闷了,为什么能够通过JUnit呢? 几经查找,都说是MySQL的bug,更换了MySQL新版本的驱动包,比如mysq

java.sql.SQLException: Unknown column 'user0_.user_name' in 'field list' 报错问题

报错信息: java.sql.SQLException: Unknown column 'user0_.user_name' in 'field list'Query is: select user0_.id as id1_0_, user0_.user_name as user_nam2_0_, user0_.password as password3_0_ from user user0_java thread: http-nio-8881-exec-1 Hibernate报错:说表里没有u

java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.解决方案

解决方案: 首先查看数据库的版本号,删除旧的jar包,将mysql-connector-java.jar更换成对应版本号同时在连接数据库的url后加上?useUnicode=true&characterEncoding=utf-8 java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via

Oracle java.sql.SQLException: 数字溢出

六月 30, 2016 5:47:47 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions信息: Loading XML bean definitions from class path resource [org/springframework/jdbc/support/sql-error-codes.xml]六月 30, 2016 5:47:47 下午 org.springf