toplink

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TOPLink SchemaManager functionality

I wanted to know how SchemaManag开发者_如何学Pythoner of toplink works. I have a DataBaseSession and I create schemamanger from it. I also have some mappings in toplink. So my question is:[详细]

2023-04-12 02:10 分类：问答
how does toplink session.refreshObject() handle one to many mappings?

am using the Session.refreshObject(Object o) method to fresh an object that has a getList() method. This开发者_Go百科 list is provided by toplink using a one to many mapping. When I refresh the object[详细]

2023-04-11 11:52 分类：问答
How can I get Toplink generated query by using getTranslatedSQLString?

So what I\'m doing is creating a subquery that gets a list of ID values, then the main query gets all the necessary values and adds ordering.[详细]

2023-04-10 16:14 分类：问答
How can I fetch first n rows from a TopLink query?

For optimization purpose, I want to fetch first N results in a subquery (I\'m getting first N ID values) and in the main query fetch full rows for the ID values in the subquery and order them. What I[详细]

2023-04-09 04:02 分类：问答
JPA Equivalent of Oracle TopLink's addBatchReadAttribute

We\'re using JPA, and when a collection of objects returns from a query, a separate query is executed for each \"child\" object related through a foreign key.[详细]

2023-04-08 16:01 分类：问答
using oracle sequences with jpa (toplink)

I have a sequence object in my oracle db: create sequence BASE_SEQ minvalue 1 maxvalue 9999999999999999999999999999[详细]

2023-04-07 10:31 分类：问答
Batch updates in JPA (Toplink)

Is there any way if executing batch updates (EntityManager persist() or merge()开发者_JAVA百科) using JPA Toplink?If you want to do a batch update, you can create a Query (either JPQL or Native SQL) t[详细]

2023-04-04 00:35 分类：问答
ORA-01400 cannot insert null error in one to one relationship

i have this code public void guardarAspirante(AspiranteDTO aspiranteDTO) { Aspirante aspirante = new Aspirante();[详细]

2023-03-22 05:55 分类：问答
Problem in converting an application from BMT to CMT

I have an application which is using weblogic server 10.3 and ejb 3.0 and also Toplink for ORM. Currently the transactions are using UnitOfWork.commit() for committing a particular action stated in th[详细]

2023-03-13 03:55 分类：问答
JPA Inheritance

Hi I\'m new to JPA and I\'m having trouble understanding how it handles inheritance. I have a specific problem I need solved without changing the DB scheme, but if you can\'t find a solution I would[详细]

2023-03-03 06:40 分类：问答