eclipselink

相关标签：javascript jquery android 多少钱 iPhone

CriteriaBuilder.isEmpty on an ElementCollection vs. JPQL approach

I\'m trying to do a simple query using the JPA2 criteria API on the following class(es): // a lot of imports[详细]

2023-03-13 00:46 分类：问答
spring eclipselink problem with IntegrityException

I try to use spring with eclipseLink and I\'ve got an IntegrityException. This is my configuration: <?xml version=\"1.0\" encoding=\"UTF-8\"?>[详细]

2023-03-11 04:35 分类：问答
Libraries for hash partitioning/Sharding with JPA

My department has decided move to hash partitioning/sharding for some of our large Oracle databases.We will be splitting our entities across different schemas.I\'ve been tasked to do a spike to evalua[详细]

2023-03-11 04:04 分类：问答
How to write JPA query with boolean condition

In my project i am using JPA 2.0 with eclipselink inplementation, an I have following problem: I have defined entity with boolean column:[详细]

2023-03-10 11:50 分类：问答
With EclipseLink, send a statement to the database on each new connection

I\'m using EclipseLink to access an SQLite database. SQLite, by default, because of backwards compatibility, does not enforce foreign key constraints. Foreign keys constraints can be enabled on per-co[详细]

2023-03-10 05:25 分类：问答
Class "Department" is mapped, but is not included in any persistence unit

I am getting this error and I have no idea the reason: Class \"Department\" is mapped, but is not included in any persistence unit.[详细]

2023-03-09 16:05 分类：问答
Getting nearly double the length when reading byte[] from postgres with jpa

I开发者_如何学C have an Image class that has a byte[] to contain the actual image data.I\'m able to upload and insert the image just fine in my webapp.When I attempt to display the image after reading[详细]

2023-03-09 14:59 分类：问答
Eclipselink delete and create leads to unique constraint exception

I have an entity that has a custom set primary key. First I delete this entity and afterwards I recreate this entity with the same primary key.[详细]

2023-03-08 22:47 分类：问答
EclipseLink deleting referenced entity

I\'m using EclipseLink as my persistance unit. I\'m having a problem on deleting an entity. Following example: a device has a type. There are many devices which could have the same type.[详细]

2023-03-08 15:54 分类：问答
When does Eclipselink use DeferredChangeDetectionPolicy although configured otherwise?

I\'m investigating a serious performance problem in my OSGi-based application which is using Eclipselink as persistence provider for JPA classes. The problem appeared very suddenly after a version upd[详细]

2023-03-07 16:31 分类：问答