hql

问题 I'm trying to select with a inner join in one of my JPA repositories the query: @Query(value = "select wm.WagerIdentification, wm.BoardNumber, wm.MarkSequenceNumber, wm.MarkNumber," + " pt.CouponTypeIdentification, pt.WagerBoardQuickPickMarksBoard " + "from WagerBoard wb " + "inner join wb.listOfWagerMarks wm on wb.WagerIdentification = wm.WagerIdentification and wb.BoardNumber = wm.BoardNumber and wb.GameIdentification = wm.GameIdentification and wm.meta_IsCurrent = 1 " + "inner join wb

问题 An employer has many employees (a one-to-many relationship). Here is how I select the employees for a given :employer : select employer.employees from Employer employer where employer = :employer I would like to filter the results to get only the employees which gender field is m . How could I achieve this using HQL? Is there any clause that I haven't noticed in the doc? Ideally, something like: and employer.employees.gender = 'm' Or: and each(employer.employees).gender = 'm' 回答1: Try this

问题 I'm currently trying to naivly get the k-nearest neighbors of a set of points, given a value k, a coordinate to use as center and a radius serving as the max distance to find points within. I'm using geographical points (SRID 4326) on a MSSQL 2008 database. The neighbors are naivly found ordering the query by the distance to the point and limiting the result. My trouble starts at limiting the points by the given radius. The distances returned by the Distance function are much larger than

问题 So we have 2 objects which each map to a db table. public class Dispute { private Long disputeSeqNo; private List<StatusInfo> statusInfos; } public class StatusInfo { private Long statusSeqNo; private Date createdDt; private String statusCd; private Dispute dispute; } A Dispute can have 0 or more StatusInfo's associated with it. Currently hibernate is returning all the StatusInfo objects for every Dispute. While in some cases this is desired. However I have a use case where: I only need to

问题 I am trying to get my head around HQL and run it inside the Persistence window of IntelliJ IDEA. Here's the thing: I can run simple queries like these: hql> SELECT offer FROM OfferEntit offer; hql> SELECT offer FROM OfferEntit offer WHERE offer.id = 1L; but if I add something like a JOIN : hql> SELECT offer FROM OfferEntit offer JOIN offer.owner AS owner WHERE owner.id = 1L; I get an empty result. Always. No matter what I do. I have no idea why.. Also I checked whether those records exist -

问题 Actually in my Hibernate Annotation based Application have theree ValueObject classes(Bean class) these are.. public Class CourseVO{ @Column(name="NAME") private String name; } SKillsetVO class public Class SkillsetVO{ @ManyToOne @JoinColumn(name="COURSE_ID", insertable=false, updatable=false) private CourseVO courseSID; @ManyToMany(cascade = {CascadeType.ALL}, fetch=FetchType.EAGER) @JoinTable(name="SKILLSET_COURSE",joinColumns={@JoinColumn(name="SKILLSET_ID",referencedColumnName="S_ID")}

问题 I'm trying to code the following HQL query using the Criteria API: var userList = _session .CreateQuery("select u from User u where u.Role.ID=3 and u.Customer.ID=:cID") .SetInt32("cID", 1) .List<User>(); (3 NHibernate objects : User(ID, Name, Role, Customer), Role(ID, Name) and Customer(ID, Name). I tried the following but it doesn't work because NHibernate tries to find a Customer associated with a Role: var userList = _session .CreateCriteria(typeof(User)) .CreateCriteria("Role") .Add

问题 I understand that a IQueryable cannot be serialized. That means that queries can not be serialized, sent to a webservice, deserialized, queried and then sent back. I was wondering if it is possible to convert a hibernate linq query to hql to be sent over the wire. Is there another route I am missing? 回答1: I think I've seen ADO.NET Data Services as advertised to work with NHibernate: http://wildermuth.com/2008/07/20/Silverlight_2_NHibernate_LINQ_==_Sweet http://ayende.com/Blog/archive/2008/07

问题 Lets say that i have two entities public class EntityA { @id @GeneratedValue @Column(name="id") private Long id; @OneToMany(mappedBy="EntityA") @JoinColumn(name = "entityA_id") private List<EntityB> entityBList; } public class EntityB { @Column(name = "MODEL_PERCENT") private BigDecimal modelPercent; @ManyToOne @joincolumn(name="entityA_id") private EntityA entityA; } What i want now is, when i fetch the EntityA i want to add a where clause to fetch all EntityBs' whose modelPercent is greater

问题 I have Person entity, which have many-to-many relationship with Address entity (which has some boolean property). This relationship represent with help of separate table (which is not an entity) I need a query like: "from Person p where p.addresses is empty or p.addresses.getLastElement.propert is TRUE" Question: Can I pull the last element of p.addresses collection in HQL question? If yes, How? If no, can I represent many-to-many relationship as entity? 回答1: Can I pull the last element of p