MySQL一直处于只会用，不怎么理解的阶段。甚至是一些较为深层次的管理，都不怎么熟悉，得加强啊！近日，系统测试，使用MySQL数据

说来惭愧，MySQL一直处于只会用，不怎么理解的阶段。甚至是一些较为深层次的管理，都不怎么熟悉，得加强啊！

近日，，系统测试，使用MySQL数据库，需要在某个表上创建触发器，数据库是在本机安装。但是，无论如何都无法创建触发器，后台错误信息如下：

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: TRIGGER command denied to user 'root'@'mortimer-PC' for table 't_user'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2677)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2627)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:841)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:681)
at com.apusic.jdbc.adapter.StatementHandle.execute(Unknown Source)
at com.apusic.esb.base.util.SQLUtil.createDBObjectIfNecessary(SQLUtil.java:263)
at com.apusic.esb.base.util.SQLUtil.createDBObjectIfNecessary(SQLUtil.java:225)
at com.apusic.esb.config.trigger.mysql.MySqlTriggerManager.createTriggersIfNecessary(MySqlTriggerManager.java:83)
at com.apusic.esb.config.trigger.TriggerConfigManager.deploy(TriggerConfigManager.java:331)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:139)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:43)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:27)
at com.apusic.esb.base.communication.socket.server.CommSocketServer$RequestProcessor.run(CommSocketServer.java:99)
at com.apusic.util.ThreadPoolImpl$WorkerThread.run(Unknown Source)
2014-06-25 10:38:42 错误 [apusic.com.apusic.esb.config.trigger.TriggerConfigManager]
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: TRIGGER command denied to user 'root'@'mortimer-PC' for table 't_user'
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.Util.getInstance(Util.java:386)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2677)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2627)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:841)
at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:681)
at com.apusic.jdbc.adapter.StatementHandle.execute(Unknown Source)
at com.apusic.esb.base.util.SQLUtil.createDBObjectIfNecessary(SQLUtil.java:263)
at com.apusic.esb.base.util.SQLUtil.createDBObjectIfNecessary(SQLUtil.java:225)
at com.apusic.esb.config.trigger.mysql.MySqlTriggerManager.createTriggersIfNecessary(MySqlTriggerManager.java:83)
at com.apusic.esb.config.trigger.TriggerConfigManager.deploy(TriggerConfigManager.java:331)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:139)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:43)
at com.apusic.esb.base.communication.CommInvokeUtil.invoke(CommInvokeUtil.java:27)
at com.apusic.esb.base.communication.socket.server.CommSocketServer$RequestProcessor.run(CommSocketServer.java:99)
at com.apusic.util.ThreadPoolImpl$WorkerThread.run(Unknown Source)

分析错误信息：TRIGGER command denied to user 'root'@'mortimer-PC' for table 't_user'，看起来是不允许root用户在t_user表上执行TRIGGER命令，为啥不允许？

分析下，首先怀疑是否驱动的问题，因为，驱动确实存在不匹配的问题，驱动的版本较低（针对5.0），而服务器版本为5.5，替换驱动之后问题依旧。