使用 HQL 比较两个表中的记录
Compare records from two tables using HQL
我有两个 table 名为 Reservation 和 Vehicle。
- 车辆 Table 有一个车辆 ID，这是它的主键。
- 预订 Table 也有一个车辆 ID 列，它是引用车辆 table 中的车辆 ID 的外键。我已经在我的数据库中指定了外键引用。
现在，我想使用 HQL 检索其车辆 ID 不在预订 Table 中的车辆的车辆详细信息。我编写了以下查询来实现这一点：
Query vehicleQuery;
vehicleQuery = session.getCurrentSession().createQuery("from VehicleBean vbean,ReservationBean rbean where vbean.vehicleID NOT LIKE rbean.vehicleID");
vehicleList=(ArrayList<VehicleBean>) vehicleQuery.list();
但是，根据 运行 代码，我收到以下错误：
Hibernate: select vehiclebea0_.VEHICLEID as VEHICLEID3_0_, reservatio1_.RESERVATIONID as RESERVAT1_5_1_, vehiclebea0_.FAREPERKM as FAREPERKM3_0_, vehiclebea0_.NAME as NAME3_0_, vehiclebea0_.REGISTRATIONNUMBER as REGISTRA4_3_0_, vehiclebea0_.SEATINGCAPACITY as SEATINGC5_3_0_, vehiclebea0_.TYPE as TYPE3_0_, reservatio1_.BOARDINGPOINT as BOARDING2_5_1_, reservatio1_.BOOKINGDATE as BOOKINGD3_5_1_, reservatio1_.BOOKINGSTATUS as BOOKINGS4_5_1_, reservatio1_.DRIVERID as DRIVERID5_1_, reservatio1_.DROPPOINT as DROPPOINT5_1_, reservatio1_.JOURNEYDATE as JOURNEYD7_5_1_, reservatio1_.ROUTEID as ROUTEID5_1_, reservatio1_.TOTALFARE as TOTALFARE5_1_, reservatio1_.USERID as USERID5_1_, reservatio1_.VEHICLEID as VEHICLEID5_1_ from ATA_TBL_VEHICLE vehiclebea0_ cross join ATA_TBL_RESERVATION reservatio1_ where vehiclebea0_.VEHICLEID not like reservatio1_.VEHICLEID
Jun 04, 2015 9:05:07 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NumberFormatException: For input string: "vehicleID"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at javax.el.ArrayELResolver.coerce(ArrayELResolver.java:166)
at javax.el.ArrayELResolver.getValue(ArrayELResolver.java:46)
at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:104)
at org.apache.el.parser.AstValue.getValue(AstValue.java:183)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1026)
at org.apache.jsp.WEB_002dINF.views.seevehicles_jsp._jspx_meth_c_005fforEach_005f0(seevehicles_jsp.java:348)
at org.apache.jsp.WEB_002dINF.views.seevehicles_jsp._jspService(seevehicles_jsp.java:288)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at `enter code here`org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
这是我的 POJO 类 Driver 和预订：
@Entity
@Table(name = "ATA_TBL_RESERVATION")
public class ReservationBean {
@Id
@Column(name = "RESERVATIONID")
private String reservationID;
@Column(name = "USERID")
private String userID;
@Column(name = "ROUTEID")
private String routeID;
@Column(name = "BOOKINGDATE")
private Date bookingDate;
@Column(name = "JOURNEYDATE")
private Date journeyDate;
@Column(name = "VEHICLEID")
private String vehicleID;
@Column(name = "DRIVERID")
private String driverID;
@Column(name = "BOOKINGSTATUS")
private String bookingStatus;
@Column(name = "TOTALFARE")
private Double totalFare;
@Column(name = "BOARDINGPOINT")
private String boardingPoint;
@Column(name = "DROPPOINT")
private String dropPoint;
@Entity
@Table(name = "ATA_TBL_VEHICLE")
public class VehicleBean {
@Id
@Column(name = "VEHICLEID")
private String vehicleID;
@Column(name = "NAME")
private String name;
@Column(name = "TYPE")
private String type;
@Column(name = "REGISTRATIONNUMBER")
private Integer registrationNumber;
@Column(name = "SEATINGCAPACITY")
private Integer seatingCapacity;
@Column(name = "FAREPERKM")
private Double farePerKm;
您需要 ReservationBean 为空的左外连接。
vehicleQuery = session.getCurrentSession()
.createQuery("from VehicleBean vbean " +
" left join vbean.reservation rbean " +
" where rbean is null");
I found a way to do the same using subquery. Although, I'm not sure out of this and the left join, which one is the more efficient one.
vehicleQuery = session.getCurrentSession().createQuery("FROM VehicleBean v WHERE (v.type =:vehicleType) AND (v.vehicleID NOT IN (SELECT r.vehicleID FROM ReservationBean r))");
vehicleQuery.setString("vehicleType", vehicleType);
vehicleList=(ArrayList<VehicleBean>) vehicleQuery.list();
我有两个 table 名为 Reservation 和 Vehicle。
- 车辆 Table 有一个车辆 ID，这是它的主键。
- 预订 Table 也有一个车辆 ID 列，它是引用车辆 table 中的车辆 ID 的外键。我已经在我的数据库中指定了外键引用。
现在，我想使用 HQL 检索其车辆 ID 不在预订 Table 中的车辆的车辆详细信息。我编写了以下查询来实现这一点：
Query vehicleQuery;
vehicleQuery = session.getCurrentSession().createQuery("from VehicleBean vbean,ReservationBean rbean where vbean.vehicleID NOT LIKE rbean.vehicleID");
vehicleList=(ArrayList<VehicleBean>) vehicleQuery.list();
但是，根据 运行 代码，我收到以下错误：
Hibernate: select vehiclebea0_.VEHICLEID as VEHICLEID3_0_, reservatio1_.RESERVATIONID as RESERVAT1_5_1_, vehiclebea0_.FAREPERKM as FAREPERKM3_0_, vehiclebea0_.NAME as NAME3_0_, vehiclebea0_.REGISTRATIONNUMBER as REGISTRA4_3_0_, vehiclebea0_.SEATINGCAPACITY as SEATINGC5_3_0_, vehiclebea0_.TYPE as TYPE3_0_, reservatio1_.BOARDINGPOINT as BOARDING2_5_1_, reservatio1_.BOOKINGDATE as BOOKINGD3_5_1_, reservatio1_.BOOKINGSTATUS as BOOKINGS4_5_1_, reservatio1_.DRIVERID as DRIVERID5_1_, reservatio1_.DROPPOINT as DROPPOINT5_1_, reservatio1_.JOURNEYDATE as JOURNEYD7_5_1_, reservatio1_.ROUTEID as ROUTEID5_1_, reservatio1_.TOTALFARE as TOTALFARE5_1_, reservatio1_.USERID as USERID5_1_, reservatio1_.VEHICLEID as VEHICLEID5_1_ from ATA_TBL_VEHICLE vehiclebea0_ cross join ATA_TBL_RESERVATION reservatio1_ where vehiclebea0_.VEHICLEID not like reservatio1_.VEHICLEID
Jun 04, 2015 9:05:07 AM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.NumberFormatException: For input string: "vehicleID"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at javax.el.ArrayELResolver.coerce(ArrayELResolver.java:166)
at javax.el.ArrayELResolver.getValue(ArrayELResolver.java:46)
at org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:104)
at org.apache.el.parser.AstValue.getValue(AstValue.java:183)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
at org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate(PageContextImpl.java:1026)
at org.apache.jsp.WEB_002dINF.views.seevehicles_jsp._jspx_meth_c_005fforEach_005f0(seevehicles_jsp.java:348)
at org.apache.jsp.WEB_002dINF.views.seevehicles_jsp._jspService(seevehicles_jsp.java:288)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:264)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1208)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:992)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:939)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:844)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at `enter code here`org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
这是我的 POJO 类 Driver 和预订：
@Entity
@Table(name = "ATA_TBL_RESERVATION")
public class ReservationBean {
@Id
@Column(name = "RESERVATIONID")
private String reservationID;
@Column(name = "USERID")
private String userID;
@Column(name = "ROUTEID")
private String routeID;
@Column(name = "BOOKINGDATE")
private Date bookingDate;
@Column(name = "JOURNEYDATE")
private Date journeyDate;
@Column(name = "VEHICLEID")
private String vehicleID;
@Column(name = "DRIVERID")
private String driverID;
@Column(name = "BOOKINGSTATUS")
private String bookingStatus;
@Column(name = "TOTALFARE")
private Double totalFare;
@Column(name = "BOARDINGPOINT")
private String boardingPoint;
@Column(name = "DROPPOINT")
private String dropPoint;
@Entity
@Table(name = "ATA_TBL_VEHICLE")
public class VehicleBean {
@Id
@Column(name = "VEHICLEID")
private String vehicleID;
@Column(name = "NAME")
private String name;
@Column(name = "TYPE")
private String type;
@Column(name = "REGISTRATIONNUMBER")
private Integer registrationNumber;
@Column(name = "SEATINGCAPACITY")
private Integer seatingCapacity;
@Column(name = "FAREPERKM")
private Double farePerKm;
您需要 ReservationBean 为空的左外连接。
vehicleQuery = session.getCurrentSession()
.createQuery("from VehicleBean vbean " +
" left join vbean.reservation rbean " +
" where rbean is null");
I found a way to do the same using subquery. Although, I'm not sure out of this and the left join, which one is the more efficient one.
vehicleQuery = session.getCurrentSession().createQuery("FROM VehicleBean v WHERE (v.type =:vehicleType) AND (v.vehicleID NOT IN (SELECT r.vehicleID FROM ReservationBean r))");
vehicleQuery.setString("vehicleType", vehicleType);
vehicleList=(ArrayList<VehicleBean>) vehicleQuery.list();