hql

问题 I have a table "Products(id, name, productionDate)" in Oracle database. "date" column is defined as String and it has value like "131120" (1st two digits for year, 2nd two digits for year & final two digits for date). I need a sorted output based on date using Hibernate. SQL query to do this is like the following: select * from products order by to_date(productionDate, 'YYMMDD') desc; This sql query is fine when I try from command prompt. But when I tried to use this query using Hibernate, I

问题 I have a DTO object like this: public class TreeViewDTO { public string Value { get; set; } public string Text { get; set; } public bool HasChildren { get; set; } } and my entity mapped with Nhibernate is: public class Entity { public virtual int Id { get; set; } public virtual string Name { get; set; } public virtual Entity Parent { get; set; } /* other properties */ } I would like to know, how can I get a List of my DTOs and fill the HasChildren property using a count method or a subquery

问题 I have been at this for hours without success. For everything I try from other incidents logged here or examples elsewhere, the HQL syntax always seems to be wrong in my method: Session session = sessionFactory.openSession(); try { Query query = session.createQuery("select p from Person p join p.books where p.personId = :personId").setParameter("personId", personId); List<Person> persons = query.list(); Person person = persons.get(0); Hibernate.initialize(person.getBooks()); return person; }

问题 I'm on trouble with an hql problem. I would like to write a query, that updates an attribut, and that's based on a value on another table. This is my example, I have those two tables : Client and Widhdrawal. Client : idClient, name ... Widhdrawal : idWidh, cost, and the idClient (foreign key) Now if i would update the client, under the condition of (idClient = 5 for example), i can't. I tried this, but in vain : String hql = "UPDATE Widhdrawal W set W.cost = :salary " + "where W.Client.id

问题 Im looking for information but I didnt find how. I have two tables: Remesas |codigo_prod| nombre |codigo_proveedor| ----------------------------------------- | 1001 | product1 | EST | | 1002 | product2 | ASM | - Proveedores |codigo_proveedor| mail | ---------------------------------- | EST | pro@mail.com | | ASM | pro2@mail.com | | DAM | pro3@mail.com | I have to delete from Proveedores the row that dont have codigo_proveedor on Remesas in this case delete DAM that its not on Remesas. Thank

问题 HI, all : i am newbie at hive, i got this error when i was creating a table using "select from " syntax, my input is as following: `hive>create table longyuan_web.tmp_recent_week_data_cookies as select u from longyuan_web.ods_mbw_user_pv where dt>='2018-07-19' and dt<='2018-07-25'and platform='31' and u is not null and length(u)>=32 and os='ios' group by u` i get this error: FAILED: SemanticException 0:0 Error creating temporary folder on: hdfs://hadoop-bd-ns01/hive/warehouse/longyuan_web.db.

问题 Why Nibernate HQL can not handle the following query: from Deal D where (D.ApprovalDate + INTERVAL 1 Year) < current_timestamp() < (D.RenewalDate + INTERVAL -1 Year) knowing that INTERVAL and YEAR are keywords in MySQL, so this is kind of mixing Sql within Hql (unless Hql can handle date functions like so and I don't know) . The dialect is MySQLDialect Its perfectly valid to execute this query SELECT '2005-01-01' + INTERVAL 1 Year; 回答1: You can pass the Sql directly in the query using

问题 I'm trying to implement paging within my project. When using NHibernate's IQueryOver syntax as shown below things are working as expected. public PagedResult<T> ExecutePagedQuery(IQueryOver<T,T> query) { SetPaging(query); var results = query.Future<T>(); var count = query.ToRowCountQuery().FutureValue<int>(); return new PagedResult<T>() { TotalItemCount = count.Value, PageOfResults = results.ToList() }; } protected virtual void SetPaging(IQueryOver<T, T> query) { var maxResults = PageSize;

问题 I have condition part of my query as follows: ... where foo.bar like '%:%' the query would execute but with no result. I think it's because of the colon since it is a reserved char in HQL. So how can I escape it without sending the : as a parameter to my query. I have already used '%\:%' and '%\\:%' with no success. 回答1: I found a solution: q=q.replaceAll(":","'||unistr('\\003A')||'"); 来源： https://stackoverflow.com/questions/18614960/how-to-escape-colon-in-hql

问题 I have Oracle table, which contains char type columns. In my Entity class i mapped oracle char type to java string type. Here is the code for my Entity class. @Entity @Table(name="ORG") public class Organization { private String serviceName; private String orgAcct; //Some other properties goes here... @Column(name="ORG_ACCT", nullable=false, length=16) public String getOrgAcct() { return this.orgAcct; } public void setOrgAcct(String orgAcct) { this.orgAcct = orgAcct; } @Column(name="SERVICE