警告 :请在下面查看我自己的答案。此问题是由10.2.0.4之外的类路径中存在的旧Oracle驱动程序引起的。问题解决了。这个问题的其余部分留给后代。
我一直在反对以下观点。这是从我的应用程序代码中提取的一个简单的POJO:
@Entity @Table(name = "PIGGIES") public class Piggy { private Long id; private String description; public Piggy() {} @Id @GeneratedValue @Column(name = "PIGGY_ID") public Long getId() { return id; } public void setId(Long id) { this.id = id; } @Lob @Column(name = "PIGGY_DESCRIPTION") public String getDescription() { return description; } public void setDescription(String d) { description = d; } }
有一个String属性和一个CLOB列。当内容很短时(例如“ hello world”),它会持续存在。对于更长的字符串,我得到以下异常:
java.sql.SQLException: operation not allowed: streams type cannot be used in batching at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179) at oracle.jdbc.driver.OraclePreparedStatement.addBatch(OraclePreparedStatement.java:4236) at org.apache.commons.dbcp.DelegatingPreparedStatement.addBatch(DelegatingPreparedStatement.java:172) at org.apache.commons.dbcp.DelegatingPreparedStatement.addBatch(DelegatingPreparedStatement.java:172) at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:31) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2403)
我将Hibernate 3.2.3与Oracle JDBC驱动程序10.2.0.4结合使用。异常消息指示批处理可能有错误。虽然可以在这种简单情况下禁用批处理,但是我需要为“实际” POJO启用批处理。实际上,就目前情况而言,查询批处理是我们完全使用Hibernate的唯一原因。
所以,我的问题是,我该如何进行上述工作?
编辑 :有趣的观察:只要长度等于或小于1333个字符,我的“ description”属性的值就会持续存在。如此奇数!
编辑2 :为了找到一种解决方案,我对getProperty()注释进行了如下修改,这没有什么区别:
getProperty()
@Lob @Type(type="text") @Column(name = "PIGGY_DESCRIPTION", length = Integer.MAX_VALUE) public String getDescription() { return description; }
编辑3 :这是“小猪”的DDL:
CREATE TABLE "PIGGIES" ( "PIGGY_ID" NUMBER NOT NULL ENABLE, "PIGGY_DESCRIPTION" CLOB, CONSTRAINT "PIGGIES_PK" PRIMARY KEY ("PIGGY_ID") USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 STORAGE(INITIAL 1048576 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "BBDATA" ENABLE ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING STORAGE(INITIAL 1048576 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT) TABLESPACE "BBDATA" LOB ("PIGGY_DESCRIPTION") STORE AS "SYS_LOB0000177753C00002$$"( TABLESPACE "BBDATA" ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10 NOCACHE STORAGE(INITIAL 1048576 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645 PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)) ;
这是整个堆栈:
org.hibernate.exception.GenericJDBCException: could not update: [com.bamnetworks.cms.types.Piggy#934] at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2425) at org.hibernate.persister.entity.AbstractEntityPersister.updateOrInsert(AbstractEntityPersister.java:2307) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2607) at org.hibernate.action.EntityUpdateAction.execute(EntityUpdateAction.java:92) at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:248) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:232) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:140) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106) Caused by: java.sql.SQLException: operation not allowed: streams type cannot be used in batching at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179) at oracle.jdbc.driver.OraclePreparedStatement.addBatch(OraclePreparedStatement.java:4236) at org.apache.commons.dbcp.DelegatingPreparedStatement.addBatch(DelegatingPreparedStatement.java:172) at org.apache.commons.dbcp.DelegatingPreparedStatement.addBatch(DelegatingPreparedStatement.java:172) at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:31) at org.hibernate.persister.entity.AbstractEntityPersister.update(AbstractEntityPersister.java:2403) ... 45 more
傻瓜警报:事实证明,我的类路径上有一个过时的JAR以及9层的Oracle JDBC类。清理完所有内容后,只需使用以下注释即可轻松完成所有工作:
@Lob @Column(name = "PIGGY_DESCRIPTION") public String getDescription() { return description; }
责怪胖手指。