Question

我现在正在使用JPA eclipselink并喜欢使用Eclipselink连接到我的数据库

我在“我的数据库”中有一些de表的类，而我有一个查询来获取我的条目：

final Query query = entityManager.createQuery("SELECT q FROM FDC_DBCHANGE q ORDER BY q.CHANGE_ID");

我为我的桌子做了一些课程：

FDC_DBCHANGE

package com.bechtle.dbchanges.model;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

@Entity
public class FDC_DBCHANGE {

    @Id
    @GeneratedValue(strategy = GenerationType.TABLE)
    private long CHANGE_ID;
    private String CHANGE_NAME;
    private String CHANGE_DATE;
    private int CHANGE_NUMBER;

    @OneToMany(mappedBy = "FDC_DBCHANGE")
    private final List<FDC_EXECUTED> checkBoxes = new ArrayList<FDC_EXECUTED>();

public String getChangeName() {
    return CHANGE_NAME;
}

public void setChangeName(final String pChangeName) {
    CHANGE_NAME = pChangeName;
}

public String getChangeDate() {
    return CHANGE_DATE;
}

public void setChangeDate(final String pChangeDate) {
    CHANGE_DATE = pChangeDate;
}

public int getChangeNumber() {
    return CHANGE_NUMBER;
}

public void setChangeNumber(final int pChangeNumber) {
    CHANGE_NUMBER = pChangeNumber;
}

public List<FDC_EXECUTED> getCheckBoxes() {
    return checkBoxes;
}

@Override
public String toString() {
    return "FDC_DBCHANGE [CHANGE_NAME=" + CHANGE_NAME + ", CHANGE_DATE="
            + CHANGE_DATE + "CHANGE_NUMBER=" + CHANGE_NUMBER + "]";
}
}

FDC_EXECUTED

package com.bechtle.dbchanges.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;

@Entity
public class FDC_EXECUTED {

@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private int ENTRY_ID;
private FDC_DBCHANGE FDC_DBCHANGE;
private FDC_SYSTEM FDC_SYSTEM;

@OneToOne
@JoinColumn
public FDC_DBCHANGE getDbChange() {
    return FDC_DBCHANGE;
}

public void setDbChange(final FDC_DBCHANGE pDbChange) {
    FDC_DBCHANGE = pDbChange;
}

@OneToOne
@JoinColumn
public FDC_SYSTEM getSystem() {
    return FDC_SYSTEM;
}

public void setSystem(final FDC_SYSTEM pSystem) {
    FDC_SYSTEM = pSystem;
}
}

和 FDC_SYSTEM

package com.bechtle.dbchanges.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

@Entity
public class FDC_SYSTEM {
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private int SYSTEM_ID;
private String NAME;
private FDC_EXECUTED fdcexecuted;

public String getName() {
    return NAME;
}

public void setName(final String pName) {
    NAME = pName;
}

@OneToMany(mappedBy = "FED_SYSTEM")
public FDC_EXECUTED getExecuted() {
    return fdcexecuted;
}

public void setExecuted(final FDC_EXECUTED pExecuted) {
    fdcexecuted = pExecuted;
}
}

当我在Tomcat上运行它时会出现以下异常：

org.springframework.web.util.NestedServletException：请求处理失败;嵌套异常是Exception [EclipseLink-4002]（Eclipse Persistence Services - 2.5.0.v20130507-3faac2b）：org.eclipse.persistence.exceptions.DatabaseException   内部异常：java.sql.SQLSyntaxErrorException：ORA-00904：＆＃34; FDC_DBCHANGE_CHANGE_ID＆＃34;：无效标识符

错误代码：904   调用：SELECT ENTRY_ID，FDC_DBCHANGE_CHANGE_ID，FDC_SYSTEM_SYSTEM_ID FROM FDC_EXECUTED WHERE（FDC_DBCHANGE_CHANGE_ID =？）       bind =＆gt; [1参数界限]   查询：ReadAllQuery（name =＆＃34; checkBoxes＆＃34; referenceClass = FDC_EXECUTED sql =＆＃34; SELECT ENTRY_ID，FDC_DBCHANGE_CHANGE_ID，FDC_SYSTEM_SYSTEM_ID FROM FDC_EXECUTED WHERE（FDC_DBCHANGE_CHANGE_ID =？）＆＃34;）       org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:932）       org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:816）       javax.servlet.http.HttpServlet.service（HttpServlet.java:620）       org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:801）       javax.servlet.http.HttpServlet.service（HttpServlet.java:727）

Eclipselink尝试运行SQL语句SELECT ENTRY_ID， FDC_DBCHANGE_CHANGE_ID ， FDC_SYSTEM_SYSTEM_ID FROM FDC_EXECUTED WHERE（ FDC_DBCHANGE_CHANGE_ID =？）

代替SELECT ENTRY_ID， CHANGE_ID ， SYSTEM_ID FROM FDC_EXECUTED WHERE（ CHANGE_ID =？）

我不知道为什么......

我希望有人可以帮助我，抱歉我的英语不好......

obsidianfarmer

Answer 1

好的，问题解决了，原因是Eclipselink需要一个我无法访问的OID，这就是问题......

HTTP状态500 - 请求处理失败;嵌套异常是异常[EclipseLink-4002]

1 个答案: