大家好，我正在尝试从数据库中检索一些数据，但我得到了
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一些列，它就会起作用。我正在使用 spring 和 hibernate
这是我的控制器代码
@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(名称=“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 ?
按照 Yak 的建议，这是我的主题域
@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;
}
}
这就是 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 | |
+--------------+---------------+------+-----+---------+----------------+
消除
column_idWHEREwhere subject_id = 1 and questionType='University' and 1=1 order by rand() limit ?
我猜是由这行代码引起的：
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()";
即使我也面临这个问题。 发生这种情况的原因是在表上创建的触发器脚本编写错误。 我指的是错误的列名/错误的表导致 SQL 错误：1054，SQLState：42S22
如果您正在使用 spring boot（2 及以上）yml，则使用此。
spring:
jpa:
hibernate:
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
如果出现此错误，请尝试更改写入表格的文件。
使用：
`import jakarta.persistence.Entity;
import jakarta.persistence.Id;
import jakarta.persistence.Table;`
而不是：
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
希望这会对您的申请有所帮助。