mysql - SQL 错误 : 1054, SQLState:42S22

Question

大家好，我正在尝试从我的数据库中检索一些数据，但是我得到了

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'subject_id' in 'where clause'

如果我检索同一个表的其他列，它会起作用。我正在使用 spring 和 hibernate

这是我的 Controller 代码

@RequestMapping(value = "/getAnyQuestion", method = RequestMethod.GET)
public @ResponseBody
String getAnyQuestion(
        @RequestParam(value = "subId", required = true) Long subId,
        @RequestParam(value = "questionType", required = true) String questionType) {

    Question questionList = questionService.getAnyQuestion(subId,questionType);

    if (questionList != null) {
        questionId = questionList.getId();
        return questionList.getQuestionText();
    }

    return "";
}

这是我的服务

 public Question getAnyQuestion(Long subId,String questionType) {             
    String query = "subject_id = " + subId +"  and "+ "questionType='" + questionType +"' and 1=1 order by rand()";       

    List<Question> questionList = hibernateTemplate.findByCriteria(DetachedCriteria.forClass(Question.class).add(Restrictions.sqlRestriction(query)),0,1);
    if (questionList.isEmpty()) {
        return null;
    }
    return questionList.get(0);
}

这是我的域名

@Entity

@Table(name = "问题")公开课问题{

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Column(length = 50)
private String questionType;
@Column(length = 5000)
private String questionText;

@ManyToOne
private Syllabus syllabus;
@ManyToOne
private Subject subject;
@ManyToOne
private Roll roll;

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}


public String getQuestionText() {
    return questionText;
}

public void setQuestionText(String questionText) {
    this.questionText = questionText;
}

public String getQuestionType() {
    return questionType;
}

public void setQuestionType(String questionType) {
    this.questionType = questionType;
}

public Syllabus getSyllabus() {
    return syllabus;
}

public void setSyllabus(Syllabus syllabus) {
    this.syllabus = syllabus;
}


public Subject getSubject() {
    return subject;
}

public void setSubject(Subject subject) {
    this.subject = subject;
}

public Roll getRoll() {
    return roll;
}

public void setRoll(Roll roll) {
    this.roll = roll;
}

完整的 StackTrace 是

    21296 [http-bio-8080-exec-10] WARN org.hibernate.util.JDBCExceptionReporter - SQL Error: 1052, SQLState: 23000
21296 [http-bio-8080-exec-10] ERROR org.hibernate.util.JDBCExceptionReporter - Column 'subject_id' in where clause is ambiguous
Jun 26, 2013 7:30:12 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/Trainning] threw exception [Request processing failed; nested exception is org.springframework.dao.DataIntegrityViolationException: Hibernate operation: could not execute query; SQL [select this_.id as id3_4_, this_.questionText as question2_3_4_, this_.questionType as question3_3_4_, this_.roll_id as roll4_3_4_, this_.subject_id as subject5_3_4_, this_.syllabus_id as syllabus6_3_4_, roll2_.id as id4_0_, roll2_.contact as contact4_0_, roll2_.rollno as rollno4_0_, roll2_.studentName as studentN4_4_0_, subject3_.id as id0_1_, subject3_.course as course0_1_, subject3_.sem as sem0_1_, subject3_.subjectName as subjectN4_0_1_, subject3_.syllabuspath as syllabus5_0_1_, syllabus4_.id as id6_2_, syllabus4_.chapterName as chapterN2_6_2_, syllabus4_.subject_id as subject3_6_2_, subject5_.id as id0_3_, subject5_.course as course0_3_, subject5_.sem as sem0_3_, subject5_.subjectName as subjectN4_0_3_, subject5_.syllabuspath as syllabus5_0_3_ from question this_ left outer join roll roll2_ on this_.roll_id=roll2_.id left outer join subject subject3_ on this_.subject_id=subject3_.id left outer join syllabus syllabus4_ on this_.syllabus_id=syllabus4_.id left outer join subject subject5_ on syllabus4_.subject_id=subject5_.id where subject_id = 1  and questionType='University' and 1=1 order by rand()]; Column 'subject_id' in where clause is ambiguous; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'subject_id' in where clause is ambiguous] with root cause
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'subject_id' in where clause is ambiguous
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    at com.mysql.jdbc.Util.getInstance(Util.java:384)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1041)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3566)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3498)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2113)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2275)
    at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:93)
    at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)
    at org.hibernate.loader.Loader.doQuery(Loader.java:697)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
    at org.hibernate.loader.Loader.doList(Loader.java:2232)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2129)
    at org.hibernate.loader.Loader.list(Loader.java:2124)
    at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:118)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1597)
    at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306)
    at org.springframework.orm.hibernate3.HibernateTemplate$35.doInHibernate(HibernateTemplate.java:966)
    at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:366)
    at org.springframework.orm.hibernate3.HibernateTemplate.findByCriteria(HibernateTemplate.java:956)
    at org.Trainning.service.question.QuestionServiceImpl.getAnyQuestion(QuestionServiceImpl.java:91)
    at org.Trainning.controller.activities.ActivityController.getAnyQuestion(ActivityController.java:749)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:213)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:126)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:647)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:603)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:950)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:859)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:883)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:781)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

我做错了什么请帮助我，如果我检索教学大纲数据但给出上述主题错误，它工作正常

这是 hibernate 生成的查询:

Hibernate: select this_.id as id3_4_, this_.questionText as question2_3_4_, this_.questionType as question3_3_4_, this_.roll_id as roll4_3_4_, this_.subject_id as subject5_3_4_, this_.syllabus_id as syllabus6_3_4_, roll2_.id as id4_0_, roll2_.contact as contact4_0_, roll2_.rollno as rollno4_0_, roll2_.studentName as studentN4_4_0_, subject3_.id as id0_1_, subject3_.course as course0_1_, subject3_.sem as sem0_1_, subject3_.subjectName as subjectN4_0_1_, subject3_.syllabuspath as syllabus5_0_1_, syllabus4_.id as id6_2_, syllabus4_.chapterName as chapterN2_6_2_, syllabus4_.subject_id as subject3_6_2_, subject5_.id as id0_3_, subject5_.course as course0_3_, subject5_.sem as sem0_3_, subject5_.subjectName as subjectN4_0_3_, subject5_.syllabuspath as syllabus5_0_3_ from question this_ left outer join roll roll2_ on this_.roll_id=roll2_.id left outer join subject subject3_ on this_.subject_id=subject3_.id left outer join syllabus syllabus4_ on this_.syllabus_id=syllabus4_.id left outer join subject subject5_ on syllabus4_.subject_id=subject5_.id where subject_id = 1  and questionType='University' and 1=1 order by rand() limit ?

根据 Yak 的建议，这里是我的主题域

    @Entity
@Table(name = "subject")
public class Subject {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    @Column(length=80)
    private Double course;
    @Column(length=60)
    private String subjectName;
    @Column(length=10)
    private Double sem;
    @Column(length=300)
    private String syllabuspath;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Double getCourse() {
        return course;
    }

    public void setCourse(Double course) {
        this.course = course;
    }

    public Double getSem() {
        return sem;
    }

    public void setSem(Double sem) {
        this.sem = sem;
    }

    public String getSubjectName() {
        return subjectName;
    }

    public void setSubjectName(String subjectName) {
        this.subjectName = subjectName;
    }

    public String getSyllabuspath() {
        return syllabuspath;
    }

    public void setSyllabuspath(String syllabuspath) {
        this.syllabuspath = syllabuspath;
    }


}

这是desc给我的

| Field        | Type          | Null | Key | Default | Extra          |
+--------------+---------------+------+-----+---------+----------------+
| id           | bigint(20)    | NO   | PRI | NULL    | auto_increment |
| questionText | varchar(5000) | YES  |     | NULL    |                |
| questionType | varchar(50)   | YES  |     | NULL    |                |
| roll_id      | bigint(20)    | YES  | MUL | NULL    |                |
| subject_id   | bigint(20)    | YES  | MUL | NULL    |                |
| syllabus_id  | bigint(20)    | YES  | MUL | NULL    |                |
+--------------+---------------+------+-----+---------+----------------+

Answer 1

消除 WHERE 子句中的 column_id 歧义:

where subject_id = 1  and questionType='University' and 1=1 order by rand() limit ?

我猜是这行代码引起的:

String query = "subject_id = " + subId +"  and "+ "questionType='" + questionType +"' and 1=1 order by rand()";       

应该是这样的

String query = "this_.subject_id = " + subId +"  and "+ "this_.questionType='" + questionType +"' and 1=1 order by rand()";