Question

嗨，这是我的实体StudentEntity.java，

  @Entity
  @NamedQueries({
    @NamedQuery(name="totalStudentSQLQuery",
                query="select count(*) as MAX_STUDENT from tblstudent"),    
    @NamedQuery(name="queryForPagination",
                query="SELECT s.studentid AS studentid, s.studentname AS studentname, s.contactno AS contactno, s.deptid AS deptid "+
                        "FROM (SELECT Row_number() OVER() AS row_num, studentid, studentname, contactno, deptid FROM   tblstudent order by studentId asc) s" +
                        " WHERE  s.row_num >=:minRow AND s.row_num <=:maxRow")
  })
  @Table(name="TBLSTUDENT")
  public class StudentEntity implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = 100034222342L;

    @Id
    @Column(name="STUDENTID")
    private Integer studentId;

    @Column(name="STUDENTNAME")
    private String studentName;

    @Column(name="CONTACTNO")
    private String contactNumber;
    .....
    .....

  }

我正在使用Hibernate 4.0 jar用于持久性提供程序，并使用JPA，

我的persistense.xml如下，

  <?xml version="1.0" encoding="UTF-8"?>
  <persistence xmlns="http://java.sun.com/xml/ns/persistence"
               xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
               xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
               version="2.0">
    <persistence-unit name="forPractise" transaction-type="JTA">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>jdbc/app</jta-data-source>
        <class>com.entity.StudentEntity</class>
        <class>com.entity.DeptEntity</class>
        <properties>
                <property name="hibernate.dialect"  value="org.hibernate.dialect.DerbyDialect"  />
                <property name="hibernate.show_sql" value="true" />
                <property name="hibernate.format_sql" value="true" />               
            </properties>
    </persistence-unit>
  </persistence>

现在，当我创建此项目的war文件并尝试在Glassfish服务器中部署时，我收到错误意外的标记：（ org.hibernate.hql.internal.ast.QuerySyntaxException：意外令牌:(第1行，第116列附近[SELECT s.studentid AS studentid，s.studentname AS studentname，s.contactno AS contactno，s.deptid AS deptid FROM（SELECT Row_number（）OVER（）AS row_num，studentid，studentname，contactno，deptid FROM tblstudent order by studentId asc）s WHERE s.row_num＆gt; =：minRow AND s.row_num＆lt; =：maxRow]

任何人都可以告诉我，我在NamedQuery中犯了错误，

我正在使用Derby数据库。

Answer 1

看起来您正在使用标准SQL查询。对于NamedQueries，您必须使用JPA-QL定义查询。

Answer 2

如果您想使用经典的SQL数据库，您必须使用注释查询 @NamedNativeQuery。

JPA查询异常意外（

2 个答案: