数据库移植： 从Oracle移植到MySQL 注意databasePlatform

采用Spring框架、JPA操作数据库开发一个小网站过程中，遇到需要将数据库从Oracle移植到MySQL，在进行单元测试时遇到如下错误：Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'SEQ_GEN_IDENTITY' in field listError Code: 1109Call: SELECT SEQ_GEN_IDENTITY.NEXTVAL FROM DUALQuery: ValueReadQuery()一开始以为是Entity的主键生成策略有问题：@GeneratedValue(strategy=GenerationType.IDENTITY)经过测试，发现问题出在

<bean id="entityManagerFactory"class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"><property name="dataSource" ref="oracleDataSource" /><property name="jpaVendorAdapter"><bean class="org.springframework.orm.jpa.vendor.TopLinkJpaVendorAdapter"><property name="showSql" value="true" /><property name="generateDdl" value="false" /><property name="databasePlatform"value="oracle.toplink.essentials.platform.database.oracle.OraclePlatform" /></bean></property><property name="loadTimeWeaver"><bean class="com.test.springmvc.util.MyClassLoader" /></property></bean>

将 databasePlatform属性注释掉就OK了