I need to create hibernate relation one to many between Department and Person (one Department has many persons).
I have a basic inheritance hierarchy setup using JPA and Hibernate that looks something like the following:
I have a little application where I store entity to DB. I do this in next way: class Entity { privete id;
Salve! Part of another question/answer on SO (as well as other statements claiming the same): if you are updating your database schema by JPA (generally not a good practice though)
I have two entities (tables): Department and Person. Both tables have a field CODE which is not unique.
I have two tables: TABLE NAME: TABLE_A A_ID A_CODE A_DESC TABLE NAME: TABLE_B B_ID B_TABLE_A_PARENT_ID B_TABLE_A_CHILD_ID
I\'m trying to do a multiselect on an entity with an IdClass. I can\'t get a column that is mapped as part of the ID. It\'s clear why I can\'t, as none of the columns that are marked as @Ids are a par
I am trying to map a PostgreSQL custom type,named transmission_result, to a Hibernate/JPA POJO. The PostgreSQL custom type is more or less an enum type of string values.
This is with EclipseLink via JPA, where I let it create the tables for me.The back end data base is Derby for development mode, and I expect to use MySQL or something else for deployment.
I have a Hibernate/JPA query which performs a simple query based on an indexed field in the database. The table is fairly large with around 28 million records but when using the database directly the
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