关于Hibernate错误Unknown table 'system_sequences' in information_schema

很久没有弄Hibernate了，最近想弄Hibernate4搭建一下环境。

字面意思应该是hibernate不知道的schema里system_sequences表.

于是检查hibernate配置文件hibernate.cfg.xml

发现dialect方言用错了，忘记改过来

org.hibernate.dialect.HSQLDialect

我用的是mysql5，应该用这个

org.hibernate.dialect.MySQLInnoDBDialect

修改后不再报Unknown table ‘system_sequences’ in information_schema错误了。

hibernate所有的方言类都放在org.hibernate.dialect包中,从hibernate4.jar中可以找到这些类。

他们均是 org.hibernate.dialect.Dialect 的子类

错误日志：

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'system_sequences' in information_schema

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:406)

at com.mysql.jdbc.Util.getInstance(Util.java:381)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2548)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2477)

at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1422)

at org.hibernate.tool.hbm2ddl.DatabaseMetadata.initSequences(DatabaseMetadata.java:149)

at org.hibernate.tool.hbm2ddl.DatabaseMetadata.<init>(DatabaseMetadata.java:70)

at org.hibernate.tool.hbm2ddl.DatabaseMetadata.<init>(DatabaseMetadata.java:63)

at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:196)

at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:178)

at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:492)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1746)

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1784)

at com.hel.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:12)

at com.hel.util.HibernateUtil.<clinit>(HibernateUtil.java:7)

at com.hel.test.EventManager.createAndStoreEvent(EventManager.java:18)

at com.hel.test.EventManager.main(EventManager.java:13)

2013-1-30 17:35:25 org.hibernate.tool.hbm2ddl.SchemaUpdate execute

ERROR: HHH000299: Could not complete schema update