I\'m using OpenJPA in my app开发者_StackOverflow中文版lication as a JPA vendor. The question is theoretical or conceptual:
I am u开发者_如何转开发sing JOINED inheritance strategy with EclipseLink JPA implementation. I have noticed that EclipseLink is adding discriminator column, named by default DTYPE, to the database sch
I am using the AndroMDA plugin for maven to generate code from an uml diagram made in MagicDraw. When the code is generated, AndroMDA desings the JPA annotation for the persitence layer. I think that
This is the same question as: How to dynamically generate SQL query based on user's selections? The only difference is, that I\'m interested in seeing solutions also using Java/JPA (+possibly Ec
We are building software in java, and are new to it. Iconfused about JPA. Normally in MVC pattern, SQL queries are hidden in model. And controller can\'t access
The naive attempt query would look like this: Query query = em.createQuery(\"from org.domain.Resource r where r._parent = ? order by ?\");
when i do query SUBSTR(e.updatetime - s.updatetime, 1,30) i will get result below +000000001 05:06:47.388000
I read this advice from error message: You should consider either expiring and/or testing connection validity
I have a single table which is generated from two jpa entities (inheritance). So we have a DTYPE column generated in the database table which has entity name has values.
In JPA, I am using @GeneratedValue: @TableGenerator(name = \"idGenerator\", table = \"generator\", pkColumnName = \"Indecator\" , valueColumnName = \"value\", pkColumnValue = \"man\")
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