Java-Hibernate和DB2-正確使用序列

Question

我想知道如何使DB2和Hibernate序列正常工作？

任何投入將不勝感激。 在下面，我有執行序列創建的sql，帶有我認為休眠應用於序列的注釋的getStockId和錯誤。

我在DB2中創建了以下序列：

  CREATE TABLE stock (
  STOCK_ID INTEGER NOT NULL,
  STOCK_CODE VARCHAR(10),
  STOCK_NAME VARCHAR(20),
  PRIMARY KEY (STOCK_ID));

  CREATE SEQUENCE seq_stock
  MINVALUE 1
  START WITH 1
  INCREMENT BY 1
  CACHE 10;

在System i中，我發出了以下命令，它可以確保直接SQL正常運行：

   insert into PGMR28.stock(STOCK_ID, STOCK_CODE, STOCK_NAME) VALUES(NEXT VALUE FOR PGMR28.SEQ_STOCK, 'TST','Test 123');

在我的Hibernate Stock對象中，執行以下操作：

@SequenceGenerator(name="SEQ_STOCK", sequenceName="SEQ_STOCK", initialValue=1, allocationSize=1)
@Id
@Column(name = "STOCK_ID", unique = true, nullable = false)
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="SEQ_STOCK")
public Integer getStockId() {
    return this.stockId;
}

在initialValue = 1時，我也嘗試了initialValue = 10。 錯誤在session.getTransaction（）。commit（）;處。 調用我的主要對象。 我收到以下錯誤：

2014-03-20_08:40:07.252 WARN  o.h.util.JDBCExceptionReporter - SQL Error: -7008, SQLState: 55019
2014-03-20_08:40:07.258 ERROR o.h.util.JDBCExceptionReporter - [SQL7008] STOCK in PGMR28 not valid for operation.
Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not insert: [com.mkyong.stock.Stock]
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2454)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2874)
    at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:79)
    at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:265)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:184)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
    at com.mkyong.App.main(App.java:37)
Caused by: java.sql.SQLException: [SQL7008] STOCK in PGMR28 not valid for operation.
    at com.ibm.as400.access.JDError.throwSQLException(JDError.java:696)
    at com.ibm.as400.access.JDError.throwSQLException(JDError.java:662)
    at com.ibm.as400.access.AS400JDBCStatement.commonExecute(AS400JDBCStatement.java:1025)
    at com.ibm.as400.access.AS400JDBCPreparedStatement.executeUpdate(AS400JDBCPreparedStatement.java:1649)
    at org.hibernate.jdbc.NonBatchingBatcher.addToBatch(NonBatchingBatcher.java:46)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2434)
    ... 11 more

Answer 1

發生這種情況的原因在於，您嘗試更新的表未記錄日志，並且您的更新正在非事務模式下運行。

你可以試試看

<property name="hibernate.connection.autocommit" value="true"/>