我对Hibernate还不熟悉,配置时遇到了一些问题。我试图建立与一个已有的Oracle数据库的只读连接。我不想让Hibernate执行任何DML/DDL和更改数据库模式,但每次我尝试部署项目时,都会看到这个消息:
INFO: updating schema
SEVERE: Unsuccessful: create table WILLOEM.SAMPLE_INFO (SAMPLE_ID varchar2(255) not null, CELL_LINE varchar2(255), STUDY_ID varchar2(255), primary key (SAMPLE_ID))
SEVERE: ORA-00955: name is already used by an existing object
这里没有造成任何损害,因为表创建失败,但我不想创建可能导致数据丢失的情况。我该如何配置Hibernate以只读方式运行?我能否完全防止语句执行,而不添加缺少特权的新Oracle用户?
以下是我的当前Hibernate配置:
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName"><value>oracle.jdbc.OracleDriver</value></property>
<property name="url"><value>jdbc:oracle:thin:@source.db.somewhere.com:1524:WILLOEM</value></property>
<property name="username"><value>username</value></property>
<property name="password"><value>password</value></property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource"><ref local="dataSource"/></property>
<property name="packagesToScan" value="com.willoem.project.hibernate" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory"><ref local="sessionFactory"/></property>
</bean>